Profile Information

Full Name: Dirk Paessler
Company: Paessler AG
Contact: [email protected]
Title: CEO

2017-Jun- 5 in All About PRTG
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What's Better: Monitoring as a Service or on Premises?

What is better, PRTG on premises or on demand? Watch this 2 minutes video to learn more about PRTG as a service.
 
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2017-Jun- 1 in All About PRTG
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The Future of Monitoring in 150 Seconds!

  • WHAT ARE THE ADVANTAGES OF A SAAS OFFERING?
  • WHAT ARE YOUR THOUGHTS ON SECURITY?
  • WHAT IS THE FUTURE OF PRTG?

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2017-May-29 in All About PRTG
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PRTG IN THE CLOUD: ALL ABOUT THE BETA TEST IN 3 MINUTES!

Any questions about the PRTG as a service beta test? Just watch this 3 minutes video and you will be given the answers:

  • HOW CAN I PARTICIPATE IN THE PUBLIC BETA?
  • DOES PRTG...

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2017-May-11 in All About PRTG
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PRTG Goes Cloud: Help Us Beta Test PRTG In The Cloud

Time and time again, we have asked ourselves the question: What's the easiest way to monitor your IT infrastructure? With PRTG Network Monitor we have established a solution, that's easy-to-use...

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2017-May- 3 in IT Insights
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Cloud Computing – Combined with BYOD – Is Changing SMB IT Forever

When you open any IT news website nowadays you can read a lot about the future of IT in the cloud. The trend to move applications and data to the cloud is...

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3 Well-Tested Strategies for Remote Network Monitoring on a Budget

Are you responsible for a distributed IT landscape, i.e. a central network and various other data centers, branches, offices, customer networks, etc.? And are you looking for a monitoring...

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How to Grow and Stay Agile – Part 2:
Top 6 Software Development Decisions

When you are running your business based on a single software product, decisions about software development are as integral to your success as Read more

How to Grow and Stay Agile –
Part 1: Top 6 Business Decisions

I have been founder and CEO of this company for almost 20 years. It started as a one person part-time shareware business,...

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2016-Jan-26 in All About PRTG
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Critical Security Update Available for PRTG Network Monitor

The following information only affects you if you are running PRTG Network Monitor V15.2.16.2229/2230 (released on April 28th 2015) through V16.1.21.1257/1258 (released on January 18th...

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2015-Jun- 2 in All About PRTG
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Examples of IT Scenarios You Can Monitor with PRTG 100 for Free

In my last blog article, I told you about our decision to offer PRTG Network Monitor 100 for free. Since then a lot of new...

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Listen Up: What Our Customers Think About Mobile, Efficiency and Support Quality

As developers of a software solution that is vital for IT departments worldwide, we constantly are looking for new ways to improve the user interface, the monitoring workflow and the...

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2015-Apr- 7 in All About PRTG
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Paessler Offers PRTG 100 for Free

Whether you are a small business owner, have a very elaborate private IT setup, or are just launching your own startup—now you have the possibility to professionally monitor your network,...

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How to Set up a Cloud Policy Before Entering the Cloud

What do weather forecasts and predicting trends in IT have in common? There's a lot of talk about clouds. Really a lot. Believe me when I say I'm not a fan of chasing trends. Besides Big Data...

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2014-May-29 in All About PRTG
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How It All Started:
11 Years PRTG Network Monitor

When it's your birthday you often start to wonder where the time is going, even more so when it's your child's birthday. With software it's not that much different. I often think of PRTG...

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Monitoring of Things:
Exploring a New World of Data

We love technology. It's what drives our developers. It's what drives our product. It's what drives our marketing. We try to avoid jumping on the bandwagon of every new IT buzzword that's out...

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Please Support the OpenSSL Project

Over the last few weeks the Heartbleed Bug pushed the OpenSSL project into the media and made us aware of the frailty of our security. It was...

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OpenSSL Heartbleed Bug Vulnerability

Today various security advisories have been published about a serious security leak in the OpenSSL library called "Heartbleed Bug". This library is one of the most common libraries used for SSL...

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The Future is Mobile: Are You Ready?

Do you remember Doc Brown, Marty McFly and their stunning time machine? After having messed things up in the first "Back to the Future" movie (letting Biff get his hands on the almanac), Marty...

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2014-Feb-25 in All About PRTG
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Critical Security Update Available for PRTG Network Monitor

The following information only affects you if you are running PRTG Network Monitor V8 through V14 and you share your PRTG installation with other users, who access PRTG via...

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2013-Jul-16 in All About PRTG
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Introducing Our New Passive Application Performance Sensor

Our new „Passive Application Performance Sensor" allows you to monitor the performance of a server/service without actually accessing neither the client...

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2013-Apr-23 in All About PRTG
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Paessler at VMware Forum 2013

VMware Forum is a free one-day event organized by VMware, the global leader in virtualization and cloud infrastructure. Hosted in several cities around the globe the event is aimed at IT...

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2012-Nov- 7 in All About PRTG
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New Version of PRTG Introduces 64bit Core Server and Other New Features

There is a new update for PRTG Network Monitor (V12.4.6) available in the stable channel. It introduces our new 64bit core server as well as numerous new...

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The WMI Performance Test (2012 Edition)

Since 2009 we have been conducting WMI performance tests to help us understand why some customers run into more WMI overload situations in their networks than other customers. In the past we...

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The Paessler Roadmap

User feedback and feature request have always been one of the driving forces behind innovation at Paessler and the improvement of our products. I want to talk about how we build our roadmap...

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How We Rate Your Feature Requests

More than {{ "number-of-worldwide-installations"|translate(lang) }} users work with our software every day. As such, we receive a lot of requests and suggestions - much more than we can action...

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Your Feedback is Highly Appreciated!

Since the very first release of our first monitoring software ("IPCheck" in 1998), we have used feedback from our customers to drive innovation and to continually improve our products. That's...

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Version 12 of PRTG will introduce "Continuous Rollout"

Today we are proud to announce the soon release of the next major version of PRTG: Version 12.2.

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Using Amazon EC2 Micro Instances For WAN and Website Monitoring

Recently the Amazon EC2 Cloud announced that their "Micro Instances" now support Windows as operating system. Before this announcement you could only use "Small Instances" for Windows machines...

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How to Setup a Failure Tolerant Online Business in Six Steps—Step 6: Know Your Costs

When monitoring and evaluating which failure tolerant setup is best for your needs, make sure you are...

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Beautiful Testing

If monitoring software is your business, there is one thing you cannot have enough of: Test systems running all over your network, under many different platforms, and on different hardware...

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How to Setup a Failure Tolerant Online Business in Six Steps—Step 2: Set Up Redundancy and Auto-Healing for Your Website

Providing redundancies is essential. If technically possible we always try to set up "auto-healing" mechanisms which kick in immediately whenever a failure happens.

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How to Setup a Failure Tolerant Online Business in Six Steps—Step 1: Choose a Reliable Hosting Provider

Thing number one is to have a website that's online and working (and to make it really fast). Many younger companies seem to head straight for the cloud, mainly to market leader Amazon EC2 or...

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We were Moving: at 67 Gigabit per Second

"Never underestimate the bandwidth of a station wagon
full of tapes hurtling down the highway."
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2011-Aug-29 in All About PRTG
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Introducing PRTG 9 Features: Sneak a Peek at CEO's Whiteboard

Today I want to share a photo from my office with you. It shows my whiteboard covered with our wish list of all the new features for PRTG version 9.

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Hosting a Website Through Amazon CloudFront

In yesterday's post I mentioned that we are now hosting our corporate website through the Read more

Paessler Has a New Website—Now Fully CDN-Hosted

You may have already noticed our new look: Last week we launched our new website for www.paessler.com. This re-launch brought a new design to our...

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2011-Mar-31 in
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Website Relaunch

Our website will be relaunched in a completely new design in early April. This is to provide all information about Paessler and our network monitoring software, PRTG, in an even easier way for...

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2011-Mar-28 in All About PRTG
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Page Load Times of PRTG for Large Installations

We recently conducted a series of performance tests of PRTG's web interface using the built-in web page...

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2011-Mar-27 in All About PRTG
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Measure the Page Load Times of Your PRTG Installation

We recently added a hidden and experimental feature that allows you to measure the page load times of your PRTG installation (it was added in version 8.3). These measurements can be quite...

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2011-Mar-27 in All About PRTG
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How to Lower Web Page Load Times of PRTG by 80%-90% in 4 Easy Steps

According to Jacob Nielsen, the usability guru for web based applications, the page load time of websites should stay below 1 second to make a...

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2011-Jan-20 in All About PRTG
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Monitoring CDN Services and Cloud Servers Using a Globally Distributed PRTG Cluster

One of our test and demo websites for PRTG is a 5-way cluster which has cluster nodes in California, Texas, Ireland, Singapore, and Australia. With this cluster we are continuously monitoring 20...

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2010-Nov-22 in All About PRTG
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More Options to use iPhone Push Notifications with PRTG

iPhone Push Notifications are a fast and cost effective way to send alarms from your PRTG server to your iPhone/iPad. Due to Apple’s design of the push notification system we cannot easily...

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2010-Nov- 9 in All About PRTG
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Consuming RESTful HTTP/XML APIs With a PRTG Sensor

With a new custom sensor (created by our friend Gerard Feijth) it is now possible to use data from REST-like APIs as sensor data in PRTG. The sensor requests data from an HTTP or HTTPS URL (using...

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2010-Nov- 3 in All About PRTG
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Beta Testers Wanted: PRTG's Database for Logs, Todos and Toplists is Now 50-300 Times Faster

During the next weeks we will officially introduce a new database system for log entries, ToDos, and Toplists. The old system (based on SQLite) was sufficient for small to medium installations,...

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2010-Sep-23 in All About PRTG
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Showing up-to-date weather information, webcam images and radar images in PRTG's maps

If you are running a "dashboard" for your NOC, e.g. by using a big screen on the wall that displays PRTG monitoring information, you can also add webcam images, weather data, current radar maps...

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2010-Sep-22 in All About PRTG
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Revisited: Don't Use Windows Vista And Windows 2008 R1 for Network Monitoring via WMI!

In June last year we published our test results for WMI monitoring performance for various combinations of Windows versions (Don't...

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2010-Sep-14 in All About PRTG
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Introducing the New All-In License Model

With the release of PRTG 8, Paessler takes a revolutionary step and completely simplifies its licensing model. Using our new add-on-free software product PRTG 8 you monitor your network without...

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2010-Aug-16 in All About PRTG
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New Features in PRTG 8 - Part 4: New Graph Types

While the beta test of PRTG 8 is running we are posting a series of blog...

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2010-Aug-10 in All About PRTG
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Vintage Browsers and PRTG: Why We Do Not Support IE6/IE7 Any More

There is an obvious trend for application design nowadays: Everybody wants web based applications! They offer three big...

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2010-Aug- 4 in All About PRTG
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News from the PRTG Community

Enabling its users to write their own custom sensors, PRTG offers a powerful option to extend existing network monitoring to make it even more convenient. Although PRTG offers out-of-the-box...

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2010-Jul-13 in All About PRTG
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The First Public Beta of PRTG 8 Is Here

Two years and 14 days ago, on June 30th 2008, we released the last new major version: version 7 of PRTG Network Monitor. Since then PRTG has seen Read more

2010-Jun-21 in All About PRTG
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iPRTG 2 - The Personal Network Monitoring Assistant on Your iPhone

As of now, iPRTG 2 is available in the iTunes store! iPRTG is a personal network monitoring assistant for your PRTG Network Monitor...

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2010-May-20 in All About PRTG
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How to Use Google Font API for the Web Interface of PRTG Network Monitor

Yesterday Google have published their new "Google Fonts API" which enables webmasters to use a selection of attractive fonts for...

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"Real World" Performance Comparison of CDN (Content Delivery Network) Providers

Since February visitors of our website http://www.cloudclimate.com have the possibility to measure "website asset delivery speed" of 24 CDN and cloud...

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2010-Apr-21 in All About PRTG
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Top 5 Troubleshooting Tips for Your WMI Problems

Windows Management Instrumentation (WMI) is a mighty tool for system administrators to monitor and to manage a whole Windows network from one central point. It allows you to start processes,...

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2010-Mar-30 in All About PRTG
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PRTG Network Monitor Gets a Massive Performance Boost for Large Installations

With the just-released version 7.3.3 of PRTG we are introducing significant improvements for PRTG's built-in web server. Especially for large...

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Big CDN Provider Test: Who Serves You Fastest?

Nowadays, state of the art websites use CDNs (Content Delivery Networks) to deliver static websites assets like images, CSS, and JavaScript files. In order to deliver these objects as fast as...

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2009-Dec- 7 in All About PRTG
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VoIP Monitoring: Why and How PRTG is Different for QoS and IP SLA Monitoring

Appreciating the benefits of mobile communication, we all have learned to condone some lack of speech quality when using our mobile phones. The possibility to communicate with everyone everywhere...

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2009-Dec- 4 in All About PRTG
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Howto: Rebooting a Computer via Windows Management Instrumentation (WMI) call

The main task of PRTG Network Monitor is to optimize your network’s availability and performance by avoiding system downtimes. All systems should always be up and running properly. That’s the...

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2009-Nov-30 in All About PRTG
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Howto: Branding and Customizing the PRTG Web Interface Using CSS

Many PRTG users want to use their own logos and/or corporate colors for the web interface of their PRTG installation. Today I want to write about a hidden feature of PRTG 7.2.x that allows you to...

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2009-Nov-26 in All About PRTG
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Monitoring (Almost) Any SQL Server Through ADO with PRTG Network Monitor

Today I would like to share a custom EXE sensor script for PRTG that monitors any SQL server using ActiveX Data Objects (ADO) and...

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2009-Nov-26 in All About PRTG
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Providing Customized Login Screens for PRTG to Customers

Recently a company that uses its own PRTG installation to monitor customers' sites asked us how they can supply customized login screens with the customers' logos when they log into the MSP's PRTG...

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2009-Nov-16 in All About PRTG
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New Version of PRTG Consumes Less Memory and less CPU Cycles

Today we have released Version 7.2.2 of PRTG Network Monitor which includes substantial improvements regarding memory and CPU usage as well as some bugfixes. The performance...

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2009-Nov-16 in All About PRTG
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Network Computing Has Tested All Major Monitoring Tools: PRTG Wins The Comparison!

In their October-issue German magazine Network Computing published a comparison test of all major network monitoring...

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2009-Nov-10 in All About PRTG
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How fast is your cloud? Depends on where you’re standing

Today I had a telefon interview about CloudClimate.com with Carl Brooks of SearchCloudComputing (techtarget.com). Afterwards Carl uploaded an interesting article about Read more

2009-Nov- 3 in All About PRTG
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PRTG Running On a Netbook Monitors the Complete Paessler LAN - Can Your Monitoring Software Do this?

Today I would like to talk about my favorite toy of recent weeks. I wanted to find the smallest PC in our company that is still able to monitor our complete production LAN network. So I wandered...

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2009-Nov- 2 in All About PRTG
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Sending Notifications from PRTG to iPhones With Prowl For Free

In the past using the Short Message Service (SMS) was the easiest way to send notifications from PRTG to mobile phones. But it required a costly service provider that forwards your message via...

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2009-Oct-16 in All About PRTG
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New PRTG 7.2.2 Beta version is available, includes performance and memory usage improvements

With version 7.2.2 we will introduce several performance and memory usage improvements. These changes will affect all installations, regardless of the number of sensors, but will be most notable...

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2009-Oct- 9 in All About PRTG
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How We Monitor Our Own Production Webservers

Today we have started our new production servers for www.paessler.com. I thought it might...

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www.paessler.com Runs on New Hardware and Software

Today we have moved our website to new productions systems. We now have a "private cloud" made of two VMware ESX servers which run our five production servers as virtual machines - plus a load...

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2009-Sep-28 in All About PRTG
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Monitoring Cisco ASA Firewalls using Netflow 9 and PRTG 7.2

Recently Cisco has implemented NetFlow 9 for its popular ASA 5500 security and firewall appliances. But this implementation of NetFlow is quite different from what other Cisco devices provide. It...

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2009-Sep-28 in All About PRTG
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Official Release of PRTG Network Monitor V7.2

The latest and improved version of PRTG is now publicly available. Our development team has been working hard since the Read more

2009-Sep- 8 in All About PRTG
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The Best Browser for PRTG (Part 3): The September 2009 Browser Shoot-Out

The web interface of PRTG uses a lot of AJAX and Javascript functions, so brower javascript performance is crucial for us. The latest versions of the most common web browsers (Read more

2009-Aug-28 in All About PRTG
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New Features in PRTG 7.2: VoIP Monitoring Using Cisco IP SLA

During the beta test of version 7.2 of PRTG Network Monitor I am posting a few posts about new features that we have built into this new version. In Read more

2009-Aug-27 in All About PRTG
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New Features in PRTG 7.2: The QoS Sensor - Our take on "VoIP Monitoring"

During the beta test of version 7.2 of PRTG Network Monitor I am posting a few posts about new features that we have built into this new version. Today's post is...

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2009-Aug-20 in All About PRTG
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New Features in PRTG 7.2: The New "S" View for Groups

During the beta test of version 7.2 of PRTG Network Monitor I will write a few posts about new features that we have built into this new version. With version PRTG 7.2 we are introducing a new...

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2009-Aug-20 in All About PRTG
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New Features in PRTG 7.2: Support for Amazon CloudWatch

During the beta test of version 7.2 of PRTG Network Monitor I will write a few posts about new features that we have built into this new version. If you are...

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2009-Aug-19 in All About PRTG
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iPRTG: The iPhone App for Administrators Using PRTG Network Monitor

Don't let monitoring your network tie you to your desk! With...

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2009-Aug-12 in All About PRTG
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Making Our Website Faster: A Comparison of Cloud Content Delivery Networks (CDNs) with Cloud Storage, Cloud Hosting and Old-Fashioned Hosting

We are currently preparing a new setup for the hosting of www.paessler.com. Because visitors to our website are coming from all over the world we decided to host CSS, images and media files on a...

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2009-Aug-10 in All About PRTG
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Public Beta Test for PRTG Network Monitor V7.2

Everybody here at Paessler AG is excited today! We are launching the public beta test for our upcoming version 7.2 of PRTG Network Monitor. This new version includes more than 400 new features and...

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2009-Jul-23 in All About PRTG
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PRTG Network Monitor supports VMware vSphere 4.0

A few weeks ago our system administrators began setting up our new VMware vSphere 4.0 server systems (two DELL PowerEdge R710 plus DELL PV...

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2009-Jul-22 in All About PRTG
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New Custom Sensors available

There are new custom EXE sensors available on prtg7addons, the Google Code open source website for PRTG.

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2009-Jul- 8 in All About PRTG
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Using PRTG's iPhone Interface on Windows Mobile Devices

From time to time we are asked about the possiblity to use PRTG's built-in iPhone webinterface from a mobile device running on Windows Mobile OS.

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2009-Jul- 3 in All About PRTG
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Using PageGate Paging Gateway to Relay Notifications for PRTG

Paessler's network monitoring software, PRTG Network Monitor, offers multiple methods to relay notifications, including SMTP mail relay, SMS, ICQ, etc., allowing users to ensure in various ways...

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Don't Use Windows Vista And Windows 2008 for Network Monitoring via WMI!

Many monitoring features of our PRTG Network Monitor software (as well as many other monitoring tools) are based on WMI. Everything is fine with WMI on Windows XP and Windows...

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Introducing Paessler Multi Server Simulator

For testing purposes Multi Server Simulator simulates a virtual network of HTTP, FTP, SMTP, or DNS servers plus any number of SNMP-based switches - all on a standard Windows PC. It is an...

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2009-May-25 in All About PRTG
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Habla Español? PRTG 7.1.3 now Available with Spanish User Interface

Today we have released version 7.1.3 of PRTG Network Monitor. The major new feature of this version is the Spanish translation of the user interface.

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Monitoring the Birth of a Search Engine - Wolfram|Alpha Goes Online

Over the last weekend the engineers of Wolfram Research gradually launched their new search engine Wolfram|Alpha (or should I better say...

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2009-May- 7 in All About PRTG
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Watching the Clouds: CloudClimate.com Provides Free Performance Monitoring of Cloud Hosting Vendors

Today www.cloudclimate.com officially leaves "stealth mode", it is now publicly available. For the last weeks we have been preparing this new website that...

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2009-Apr-28 in All About PRTG
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How we solved WMI error "8002801D : Library not registered" on an Exchange 2003 Server

When we tried to monitor a test installation of Exchange Server 2003 in our labs using WMI we always received the following WMI error message:
8002801D : Library not...
                    

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2009-Apr-17 in All About PRTG
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How To Get Rid of Huge "Default User\Local Settings\Temporary Internet Files\Content.IE5" Folders

Some PRTG users that use the new "HTTP Full Page Sensor" on the local probe (or on remote probes) have found huge amounts of disk space eaten up by the Internet Explorer cache folder of the...

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2009-Apr-14 in All About PRTG
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Comparing Amazon EC2 performance with other cloud/VPS hosting options... and real hardware

We wanted to roughly rate performance of a virtual server hosted by Amazon EC2 compared to other hosting offerings. So last week we ran several performance...

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2009-Apr- 8 in All About PRTG
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Dutch Translation for PRTG Network Monitor Available

Thanks to avid PRTG customer Gerard Feijth from the Netherlands you can now run the PRTG user interface in Dutch. He has translated the complete user interface into Dutch!

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2009-Apr- 7 in All About PRTG
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Monitoring Cloud Performance with PRTG: Comparing Disk Speed for Instance Stores and EBS Volumes on Amazon EC2

Here is another insight on Amazon's EC2 services that we found during our recent cloud monitoring experiments: For a couple of days we ran our load test sensor for...

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2009-Apr- 3 in All About PRTG
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Testing Cloud Computing Performance with PRTG: Performance Comparison of Amazon EC2 Instance Types

In version 7.1 of PRTG Network Monitor we have added a set of custom sensors which can be used to test the available CPU, disk and memory resources by running short load tests. We have used these...

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The Browser War Revisited (Part 3): Which Browsers Do People Use Around the World?

In the last weeks I have looked at the currently available web browsers from a "performance-for-PRTG" perspective and found that Chrome and Firefox are our...

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2009-Mar-31 in All About PRTG
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PRTG Network Monitor 7.1 - Official Release

This is an exciting day for everybody here at Paessler AG: After seven months of hard work we have finally uploaded the V7.1 release binaries of PRTG Network Monitor. This new version contains...

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2009-Mar-27 in All About PRTG
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New Features in PRTG 7.1 (Part 7): "Official Support for PRTG Virtualizing"

During the beta test of PRTG Network Monitor 7.1 I am posting a number of blog articles about new features in the new version. Virtualization has become...

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2009-Mar-26 in All About PRTG
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Almost There: Announcing the Release Candidate of PRTG 7.1

The official beta test for version 7.1 of PRTG Network Monitor is approaching its final stage. Today we have uploaded the Release Candidate! During the public beta test (ongoing since Read more

2009-Mar-26 in All About PRTG
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How PRTG computes CPU Index, Traffic Index and Response Time Index for your network

In order to provide graphs that show a quick status overview of your complete network (or a part of it) PRTG computes so-called "index" values based on the measurements of all sensors. The...

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2009-Mar-25 in All About PRTG
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New Features in PRTG 7.1 (Part 6): "SNMP Trap Notifications"

During the beta test of PRTG Network Monitor 7.1 I am posting a number of blog articles about new features in the new version. In PRTG V7.1 we have added a new option for...

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2009-Mar-24 in All About PRTG
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New Features in PRTG 7.1 (Part 5): "Automatic Probe Updating"

During the beta test of PRTG Network Monitor 7.1 I am posting a number of blog articles about new features in the new version. Another new break-through feature of PRTG 7.1 is the...

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2009-Mar-23 in All About PRTG
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New Features in PRTG 7.1 (Part 4): "Email Round Trip Monitoring"

During the beta test of PRTG Network Monitor 7.1 I am posting a number of blog articles about new features in the new version. Another interesting new feature in PRTG 7.1 is...

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2009-Mar-19 in All About PRTG
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New Features in PRTG 7.1 (Part 3): "Copying Devices by Cloning or Using Device Templates"

During the beta test of PRTG Network Monitor 7.1 I am posting a number of blog articles about new features in the new version. After configuring a device with one or more sensors there...

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2009-Mar-16 in All About PRTG
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Beta 3 (aka "Final Beta") of PRTG Network Monitor 7.1 is available

Today the final beta of PRTG 7.1 is available. This new version includes more WMI improvements, again more speed improvements for the web interface as well as many other changes. The next step...

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2009-Mar-16 in All About PRTG
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What to do when PRTG's ESX sensors show "Connection hangs. Check SSL on VMware server, then restart probe." message

When monitoring VMware ESX 3.5 servers with PRTG 7 we have seen situations where the HTTPS webserver of the ESX server crashes (i.e. the management interface is no longer accessible). In PRTG 7...

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2009-Mar-16 in All About PRTG
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What to do when PRTG’s ESX sensors show "Connection hangs. Check SSL on VMware server, then restart probe." message

When monitoring VMware ESX 3.5 servers with PRTG 7 we have seen situations where the HTTPS webserver of the ESX server crashes (i.e. the management interface is no longer accessible). In PRTG 7...

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2009-Feb-27 in All About PRTG
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Beta 2 of PRTG Network Monitor 7.1 is available

Today we have uploaded Beta 2 of PRTG Network Monitor V7.1. Since V 7.0.9 more than 700 changes (new features, improvements, bugfixes) have been built into the code. Most of these changes are...

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2009-Feb-27 in All About PRTG
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New Features in PRTG 7.1 (Part 2): "Toplists"

During the beta test of PRTG Network Monitor 7.1 I am posting a number of blog articles about new features in the new version. Packet Sniffing and NetFlow sensors can not only measure the total...

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2009-Feb-25 in All About PRTG
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The Best Browser for PRTG 7 (Part 2): The February 2009 Browser Shoot-Out

Yesterday's announcement of the public beta of Apple's Safari 4 browser gave us reason to re-evaluate the currently...

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2009-Feb-20 in All About PRTG
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New Features in PRTG 7.1 (Part 1): The "Sensor Factory"

During the beta test of PRTG Network Monitor 7.1 I will post a number of blog articles about new features in the new version. One of the coolest new features in V7.1 is the "Sensor Factory". It...

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2009-Feb-18 in All About PRTG
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How to Move an Installation of PRTG 7 to Another Computer

Today we have added a new article to the knowledgebase which explains how to move an installation of PRTG Network Monitor V7 onto another computer. The steps are:

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2009-Feb-13 in All About PRTG
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Introducing an Open Source Platform for Addons for PRTG Network Monitor

To support the exchange of ideas and knowledge between the users of PRTG Network Monitor - including our own labs and developers - we have created an open source platform on Google's projects...

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Five Free and Quick Ways to Create Beautiful Network Maps Online

In order to make the results of your network monitoring available in your Intranet or for customers we recommend using the "Maps" feature of Read more

"Cannot Assign Requested Address (#10049)" Errors in Webserver Stress Tool under Vista

Recently some users of our product Webserver Stress Tool found out that they could not perform any load tests anymore - but it had worked fine on their Vista computers before.

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Packet Sniffing Debug Tool Updated

Our Card Packet Counter is a small tool that shows live stats and a short term statistical history about the network data packets and streams passing a local network card....

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Monitoring your Internet Bandwidth Usage with a LinkSys RVS 4000 Router and PRTG Network Monitor

Many users of the freeware of PRTG Network Monitor use the software to simply monitor their Internet router and to find out how much bandwidth they consume in a month. The...

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2008-Oct- 9 in All About PRTG
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How We Created a Globally Distributed Monitoring System with PRTG for Less Than US$220/Month

As a testbed and demonstration website for the "Remote Probe" feature of our monitoring software PRTG Network Monitor (and out of...

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2008-Oct- 1 in All About PRTG
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Monitoring System Parameters of VMware ESX Servers Hosts and Virtual Machines

With version 7.0.9 we are introducing specialized sensors for monitoring of VMware ESX servers. These sensors talk...

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2008-Sep- 5 in All About PRTG
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The Browser War is Back: Choosing the Best Web Browser for PRTG Network Monitor

Since Google have launched their new browser "Chrome" a few days ago development in the world of Web browsers is becoming quite interesting. The new...

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2008-Aug-25 in All About PRTG
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The return of the TEXTLIST interface

With the latest beta version of PRTG Network Monitor 7.0.8 we have re-implemented the so-called "TEXTLIST" interface which makes access to the current monitoring status of all your sensors easy.

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How can I monitor my available bandwidth 24/7?

We receive questions like this every few days. User of our monitoring products want to know if their ISP or hosting service is actually providing them with the available bandwidth that they are...

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2008-Aug-19 in All About PRTG
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Introducing the PRTG Network Monitor API

Starting with Version 7.0.8 PRTG Network Monitor (currently in public beta testing) includes a web-based API that enables external programs to have access information from the monitoring...

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2008-Aug-15 in All About PRTG
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PRTG goes mobile: Introducing the iPhone-optimized Interface

With version 7.0.8 (currently in beta) we have added a new user interface that is optimized for the Apple iPhone. This feature enables the user to quickly check the status of his servers and...

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2008-Jul-22 in All About PRTG
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New version 7.0.6 of PRTG Network Monitor

We have uploaded a new version of PRTG 7. This version includes new features, usability improvements and a number of bugfixes. Besides a number of bugfixes and changes we have added the...

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2008-Jun-30 in All About PRTG
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Official Release of PRTG Network Monitor V7.0

Today we have officially released PRTG Network Monitor Version 7. This new version marks a major step in the development of Paessler's monitoring products.

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2008-Jun- 2 in All About PRTG
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Introduction to PRTG 7 for IPCheck 5 users - What's new? What's different?

A new knowledge base article summarizes the differences between PRTG Network Monitor 7 and its part-predecessor IPCheck 5 - from the perspective of an Read more

2008-May-27 in All About PRTG
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Release Candidate 1 of our new flagship product PRTG 7 is available for download

Today we have uploaded the first Release Candidate of our new monitoring tool PRTG Network Monitor.

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2008-May-23 in All About PRTG
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Introduction to PRTG 7 Part 6: Why we created the PRTG 7 user interface to be a little.... different

This another posting of my series of introductory blog posts about our new software "PRTG Network Monitor 7" which is currently undergoing a public beta test. We began the...

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2008-May-14 in All About PRTG
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Listening to Customer Requests. That's what we've done - for PRTG 7.

I do understand that - being used to PRTG 6 - looking at PRTG 7 may let you frown at the first glance. And yes, maybe the new software isn't the kind of breakthrough user interface that we have...

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2008-May- 9 in All About PRTG
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Introduction to PRTG 7 Part 5: The "Inheritance" Concept

This another posting of my series of introductory blog posts about our new software "PRTG Network Monitor 7" which is currently undergoing a public beta test.

The...

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2008-May- 8 in All About PRTG
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Introduction to PRTG 7 Part 4: Object Hierarchy - Probes, Groups, Devices, Sensors, Channels

This another posting of my series of introductory blog posts about our new software "PRTG Network Monitor 7" which is currently undergoing a public beta test.

In PRTG...

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2008-May- 7 in All About PRTG
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Introduction to PRTG 7 for PRTG 6 users - What's new? What's different?

Today we have published a new knowledgebase article that summarizes the differences between PRTG Network Monitor 7 and its predecessor PRTG Traffic Grapher 6 - from the perspective of a PRTG 6...

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2008-May- 6 in All About PRTG
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Introduction to PRTG 7 Part 3: User Interface Navigation

Here is another posting of my series of introductory blog posts about our new software "PRTG Network Monitor 7" which is currently undergoing a public beta test.

The...

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2008-May- 5 in All About PRTG
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Introduction to PRTG 7 Part 2: System Architecture

This blog post continues my series of introductory blog posts about our new software "PRTG Network Monitor 7" which is currently undergoing a public beta test. PRTG Network Monitor System...

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2008-May- 2 in All About PRTG
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Introduction to PRTG 7 Part 1: Product Overview

Over the next few weeks I will publish a number of introductory blog posts about our new software "PRTG Network Monitor 7" which is currently undergoing a public beta...

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2008-Apr-15 in All About PRTG
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The first Public Beta of PRTG Network Monitor V7 is available

After so many months of busy development work everybody at Paessler AG is proud to present the first publicly available beta version of PRTG Network Monitor 7, our new flagship monitoring...

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2008-Jan-24 in All About PRTG
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On some systems disabling DEP can solve problems running PRTG on 64-bit Windows

We recently had a customer who after having experienced multiple crashes while running PRTG under Windows Vista 64-Bit updated to version 6.2.0.907 only to notice that PRTG did not even start up...

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Installation of PRTG Traffic Grapher on Ubuntu Linux

You do not need a Windows based computer (and a Windows license) to use most of PRTG's features. You can also run PRTG Traffic Grapher 6.x on Linux....

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Downtime of paessler.com website due to a traffic accident

Apparently a traffic accident is to blame for almost 3 hours of downtime for our corporate websites in the night from Monday to Tuesday. A truck driver lost control over his vehicle due to Read more

2007-Oct-19 in All About PRTG
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Handy SNMP resources on the Cisco website: Cisco MIB Listings, MIB Locator, and OID Translator

Recently we came across the following three pretty notable pages provided by Cisco, allowing users to find Cisco MIBs and to discern OID segment almost at a glance.

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Bug in Cisco ASA 5505 causes PRTG to report the same traffic on all VLANs

We have had multiple queries regarding strange, respectively wrong readouts when monitoring certain ASA equipment. As we found out today, the problem is a bug in the 7.2 OS causing the SNMP...

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Most common causes of network outage include inadequate bandwidth, excessive file streaming and device misconfiguration

Our latest press release reports about the latest survey results from users of PRTG Traffic Grapher. It reveals that bandwidth management software is a key component in preventing network downtime.

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2007-Aug-29 in All About PRTG
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Negative PING times on AMD Dual Core Processors - Solved

[UPDATE Oct 2010] There seems to be an easier solution than the one mentioned below: By using the "/usepmtimer" boot.ini flag (simply add this line to boot.ini) you can change the time source for...

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2007-Aug-20 in All About PRTG
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New Version 5.4.1 of IPCheck Server Monitor adds WMI Sensors and Vista Support

Today we have released the latest version 5.4.1 of IPCheck Server Monitor. The main new feature is support for five new sensors based on WMI

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2007-Jul-10 in All About PRTG
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Latest IPCheck beta version adds WMI sensors and support for Vista

The latest beta for IPCheck Server Monitor version 5.4.1 mainly adds two new features: WMI sensors and Vista support.

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Detecting Common Network Problems, Part VII: Intrusions

Intrusions to your network can easily occur at anytime and often come from unexpected sources. Intrusions from hackers, internet worms, viruses, Trojans, or just people curious about what you...

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SNMP on Windows Vista rendered dysfunctional by NOD32 Anti Virus

Since Vista came out we had a strange problem with our Vista workstations: We were absolutely not able to query them through SNMP (using our PRTG or IPCheck as well as any other SNMP tool). SNMP...

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Detecting Common Network Problems, Part VI: Software Problems

Software-related network problems can cause one or more computers or devices to lose the ability to communicate with other devices on or outside the network.

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Detecting Common Network Problems, Part V: Network Collisions

Although the word sounds negative, collisions are a normal part of a healthy network. A collision is the mechanism used by the network to control access and to allocate shared bandwidth among...

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Detecting Common Network Problems, Part IV: Connectivity Problems

Connectivity problems occur when devices on the network cannot communicate with other areas of the network due to hardware or software problems. With Network Monitoring, you can detect a...

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Detecting Common Network Problems, Part III: Hardware Problems

Hardware problems occur when a network device is not working properly and cannot send or receive some or all data. With the myriad of hardware devices connected to the network at any given time...

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Detecting Common Network Problems, Part II: Cable Problems

Cables are a vital part of any network. Cables are also prone to wear and tear, which can cause problems across the network. The obvious solution would be to make sure you install cables in places...

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Detecting Common Network Problems

Network Monitoring allows you to accurately recognize and diagnose networking problems with the goal of keeping your network running optimally. Your network is a vital business asset, and...

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Web 2.0 & Co. Demand a Robust Performance

For all e-enterprises a well designed and reliable web page has to be part and parcel of the marketing mix - especially as the online presence often establishes that vitally important, initial...

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Preparing for the Moment of Disaster

Monitoring, knowing what to monitor, and knowing whom to tell, still do not provide the whole solution for proper Network Monitoring; you must also know what to do when monitoring discovers problems.

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2007-Jun- 1 in All About PRTG
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What does the sensor name "Error converting OID" mean when creating sensors using an OIDLIB in PRTG

After converting a vendor specific MIB file into a Paessler oidlib with Paessler's MIB Importer Tool and using this oidlib as source for the creation of a SNMP sensor in PRTG, "Error converting...

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OK, you are monitoring your network. Now: Whom To Tell The Results

Once you perform regular monitoring, it will not help if you keep all the results and findings to yourself. Knowing whom to tell what information, and when to tell it, is a major necessity.

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The three most important readings that you should monitor

Merely implementing a Network Monitoring solution is not enough. You should also know which aspects of your network need monitoring.

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Creating websites for high traffic

When creating websites for high traffic the magic keyword is "scaling". There is an interesting presentation by Cal Henderson (architect with flickr.com)...

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2007-Feb-27 in All About PRTG
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Windows Event ID 7039 on machines running PRTG Traffic Grapher

If you run PRTG Traffic Grapher as a service on your computer you may see Windows Event ID 7039 in your System Event log.

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2007-Feb-19 in All About PRTG
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Changes in the Daylight Saving Time in the USA and their impact on IPCheck and PRTG

The U.S. Energy Policy Act of 2005 extended Daylight Saving Time (DST) in the U.S. by approximately four weeks. As a result, beginning in 2007, DST will start three weeks earlier on March 11,...

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Fiddler HTTP Debugging Proxy

Fiddler (by Microsoft) is an interesting HTTP Debugging Proxy which logs all HTTP traffic between your computer and the Internet. Fiddler allows...

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2007-Jan-31 in All About PRTG
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Increasing the width of the taglist in PRTG's web interface

Some users have asked us how they can increase the width of the taglist in PRTG's web interface. They use longer tag names and/or group names which are cropped when they use PRTG's default setting...

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Load testing web applications that use Flash animations

Today we have received this typical question: "I'm trying to find a load testing product which would allow me to load test flash applications. I've tried webserver stress tool 7 and it doesn't...

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2007-Jan-24 in All About PRTG
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Setting up SQL Server Sensors for MS-SQL, MySQL and Oracle with IPCheck Server Monitor

Using the SQL Server sensors you can natively monitor the most used SQL servers: MySQL, Microsoft SQL, and Oracle SQL. Basically, the sensors monitor whether the database server process...

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2007-Jan- 9 in All About PRTG
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Details about the meaning of the "Busy Sensors" value in PRTG Traffic Grapher

While you are using the Windows GUI of PRTG you will see a "Busy Sensors" value in the statusbar. In larger installations or installations with small intervalls you should have an eye on this...

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2007-Jan- 8 in All About PRTG
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"This program has been damaged..." messages when starting Paessler programs

If you receive the message "This program has been damaged, possibly by a bad sector of the hard drive or a virus. Please reinstall it." when starting IPCheck Server Monitor,...

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Remotely fixing a PC via the Internet - Free & Instantly

Every once and a while you come across the task to remotely control a PC across firewalls, NATs etc. We are not talking about controlling a PC or server in your LAN or VPN (where you have full...

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2006-Dec-27 in All About PRTG
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Updating IPCheck Remote Probes Remotely

Since the remote probe software version needs to match the IPCheck host software version it is always necessary to update the probe's software each time the host's software is updated. In...

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2006-Dec-20 in All About PRTG
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Monitoring a WRT54G/GS with PRTG

The LINKSYS WRT54G/GS routers are quite popular and offer the ability to upload your own firmware. With the right firmware you can monitor the router using SNMP.

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2006-Dec- 5 in All About PRTG
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New beta version of IPCheck Server Monitor

We have published a new beta of IPCheck Server Monitor that adds a couple of new and interesting features.

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2006-Nov-27 in All About PRTG
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New Beta available: PRTG V6.0.6 adds Aggregate Graphing

The latest beta version of PRTG 6 adds a feature that has been requested numerous times by many customers: Graph Aggregation! Using aggregated graphing you can now sum up the traffic data of two...

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2006-Nov-24 in All About PRTG
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Monitoring non-integer SNMP values with IPCheck Server Monitor

We have published a new article in our knowledge base that explains how you can use the Custom Script sensor of IPCheck Server Monitor to monitor non-integer values via SNMP.

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2006-Nov-24 in All About PRTG
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Paessler MIB Importer V1.0 Beta

Now there is a brand new version of our MIB Importer Tool available on the website. With this software you can easily import MIB files and convert them into OID libraries for PRTG...

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Microsoft enters the Virtual Appliances Arena

Microsoft now offers preconfigured virtual machines that enable you to test drive setups of some of their server systems using MS Virtual Server 2005 R2.

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Admin's Toolbox: Webpage elements download timing analysis

A new interesting online tool helps you to analyze how a browser downloads the elements of a page. All single HTTP requests with their timing are shown in an easy to read graph.

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Four seconds is the maximum time online shoppers will wait for a Web page

A web shop has 4 seconds to deliver its webpages according to a study from JupiterResearch that examines consumer reaction to a poor online shopping experience - or the customer goes someplace...

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Five reasons to get serious about bandwidth monitoring

Here is a short list of the top five reasons why you seriously should consider to implement bandwidth monitoring in your network:

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The 64 Bit Counter Mystery: Trouble with a HP Procurve Gigabit Switch

We had upgraded the last remaining dark and slow 100 Mbit corner of our data center from 100 Mbit Ethernet to Gigabit Ethernet the other day. We installed an HP Procurve 1800-8G which offers...

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How to Choose the Right Bandwidth-Monitoring Solution

If you work in the networking industry, you no doubt spend more time than you'd like putting out the proverbial fire and then wondering how it started. Your network -- however well-conceived or...

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Using PRTG and IPCheck with Windows Defender

We have been informed a couple of times that Microsoft's anti-spyware software Windows Defender seems to be...

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Admin's Toolbox: Sending large files by email

We have all seen this: You want to send a multi-megabyte file to someone, but most mail accounts and mail servers don't work with files beyond a few megabytes. But there are some website services...

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Admin's Toolbox: Managing Your Remote Desktop Connections

Like most busy system administrators in medium sized Windows server environments I usually connect to at least 5 to 10 servers on an average day using remote desktop. Today I found a small...

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2006-Oct-12 in All About PRTG
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Minimizing diskspace usage for monitoring data by using NTFS built in compression

The monitoring databases of PRTG Traffic Grapher and IPCheck Server Monitor can become quite large for installations with many sensors. E.g. we have a monitoring database of some 3 GB for one of...

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2006-Oct- 9 in All About PRTG
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IE7 Is Coming This Month... Paessler Products Are Ready!

IE7 will available later this month and in the coming weeks it will be installed automatically (!) on all Windows systems on the planet via the automatic update service. Are you ready? At...

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The Multi-Browser Appliance

An administrator has to make sure that all users inside his LAN as well as visitors accessing his public web servers from the outside are enjoying a good user experience. Webpages must load fast,...

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How LAN Switches Work

The "How Stuff Works" website has a neat introductory article that explains how switches work. It is obviously based on a technical document from the Cisco website which was enhanced with various...

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2006-Sep-26 in All About PRTG
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Running PRTG Traffic Grapher on a Linux computer

A new segment in the sphere of operating systems seems to build up. Somewhere between the paid-for Windows operating systems and the open-source Linux...

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2006-Sep-25 in All About PRTG
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Comparing MRTG with PRTG Traffic Grapher

The choice between MRTG and PRTG for your network bandwidth monitoring is - to some extent - a matter of how comfortable you are with configuration files, a manual installation and with adding...

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Top 5 reasons for sudden traffic peaks shown by bandwidth monitoring

Sometimes users of our network monitoring software PRTG Traffic Grapher contact our support team and report peaks in their bandwidth monitoring graphs. Most of these peaks only...

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Changing the colors of the sensorlist of PRTG Traffic Grapher

With version 6 we introduced a less colorful look&feel for the sensor list of the web interface and Windows GUI. First let me shortly explain why we did what we did: We sat together with graphical...

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Free ebook from Cisco Press: "Cisco Router Configuration"

ebook.gif Cisco press offers a free ebook download on their website for the book "Cisco Router Configuration,...

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2006-Sep-15 in All About PRTG
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A detailed look at changes in PRTG Version 6

Since the last version 5.x we have applied so many changes to PRTG when working on version 6 that I can not mention them down to the last detail. I already mentioned the most notable changes in...

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2006-Sep-13 in All About PRTG
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PRTG Traffic Grapher Version 6 Released

PRTG has become the Windows tool of choice for bandwidth and network usage monitoring. It brings many SNMP monitoring features from MRTG - which is well known in the Linux community - to the...

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The Monitoring Triplets: Availability, Speed, and Usage

Merely implementing a Network Monitoring solution for your network is not enough. The biggest part of the work begins right after choosing and installing a monitoring solution. Now it is time to...

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10 Things About Your Company That You Should be Monitoring on the Web

In a time of bloggers and social networks the reputation of your company may be talked about on the Web all the time. You should know about that! Read more

Monitoring the Online Reputation of a Product or Company Name: Introduction

Today we are talking about a different kind of monitoring: This time we are not monitoring a network or systems. We are monitoring the web and the blogosphere for your product and/or company...

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Searching for problems on a slow Unix/Linux server

There is a nice article on IBM's developer works website that explains how to use various command line tools to analyze runtime problems on Unix systems:
When your UNIX® system...

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2006-Aug-25 in All About PRTG
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Directory Traversal Vulnerability Issue Fixed for IPCheck Server Monitor

We have published a new version of IPCheck Server Monitor that fixes a security issue in the webserver: By Using URLs with special characters a so-called "directory...

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Easy to read Drawings of IP, TCP and UDP Packet Headers

This is some quite technical information, but it may help you to understand the foundations of everyday networking. Matt Baxter has some drawings that will show you how the structure of the...

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Top Five Reasons to use Network Monitoring in Your Network

If your company conducts business via the World Wide Web, optimum performance of your business website is not only critical for the growth of your business but also for its survival. Listed...

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2006-Aug-17 in All About PRTG
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Analyzing a Slow Exchange 2003 Server

You have been there: All servers seem to be getting slower over time. Always. But is it really the problem? Does it really hurt your business? And what can you do against it? For Windows...

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2006-Aug-16 in All About PRTG
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Monitoring System Parameters like Memory, CPU and Disks on Linux Systems via SNMP

Every other day users of our monitoring products PRTG Traffic Grapher and IPCheck Server Monitor ask us how they can monitor system parameters like CPU...

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The art of network troubleshooting

Grag Schaffer has published an article on computerworld.com about his approach to network latency hunting and troubleshooting. Makes a nice reading over lunch.
While the...

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Why Network Monitoring Is Important For Any Business

Before we begin to talk about the importance of Network Monitoring, let's see what "Network Monitoring" exactly is. The free online encyclopedia Wikipedia says:
"The term Read more

2006-Aug-14 in All About PRTG
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Using Multiple-Host-PINGs to monitor the performance of a WAN connection

The basic idea of this new custom sensor for IPCheck Server Monitor is that in many cases sending PINGs over a WAN connection to just one device is not a very reliable means of testing the...

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Interview: The Benefits of Network Monitoring (Part 2)

This is of part 2 a transcript of an interview between me and a journalist who wanted to know more about the benefits of network monitoring. We were talking about the benefits of an...

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2006-Aug- 8 in All About PRTG
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Installing the NET-SNMP daemon on Debian Linux

In order to monitor system parameters like memory and CPU load on Linux systems we recommend to install an SNMP daemon on the system. Then you can monitor the parameters using SNMP. Today I...

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Interview: The Benefits of Network Monitoring (Part 1)

This is a transcript of an interview between me and a journalist who wanted to know more about the benefits of network monitoring. We were talking about the benefits of an uptime/downtime...

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2006-Aug- 2 in All About PRTG
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PRTG Version 6 Enters Beta Test Phase

Good news for PRTG users: Today we have released the first beta of the upcoming version 6 of PRTG Traffic Grapher! Late night yesterday lead developer Jens Rupp gave his ok to make the download...

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2006-Jul-11 in All About PRTG
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Freeware and Standard Edition of IPCheck massively upgraded

Today IPCheck's lead developer Roland has released V5.3.2 of IPCheck Server Monitor which dramatically enhances the features available for the users of the Freeware Edition and the Standard...

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2006-Jun-20 in All About PRTG
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New version of IPCheck changes behaviour of the sensor request scheduler

The new version 5.3.1.586 of IPCheck Server Monitor introduces some small changes to the request scheduler: now also latency timeouts are additionally used for sensor scheduling. This improves the...

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Site Inspector becomes Freeware!

We have released Site Inspector with full functionality as a Freeware today. You can now download and use Site Inspector for free on your PC!

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