Knowledge Base
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General Networking
General Networking (8)
The Basics of Website and Network Monitoring
IP Address Basics
The Basics of Webserver Performance Testing
Removing XP SP2's limitation on outgoing TCP connection attempts
Testing WMI Requests
SNMP, MIBs and OIDs - an Overview
A short introduction to IP Addresses
Installing the SNMP service on Windows NT/2000/XP/2003
Network Tools (4)
Configuration Tips for Cisco Routers and PRTG
Checking and debugging your local IPs
Recording HTTP URLs for Complex Web Applications
Fport: Lists open TCP ports and their associated applications
Recommended Books (1)
Book Recommendations for Webserver Load and Performance Testing
SNMP FAQs (10)
Configuration Tips for Cisco Routers and PRTG
Using Paessler SNMP Tester to debug SNMP problems with PRTG
Changing the SNMP Port Number on a Windows System
Solving "Could not connect" or "Error 10060" Messages when using SNMP
SNMP, MIBs and OIDs - an Overview
How do I install the SNMP daemon on Linux machines?
Security aspects when working with SNMP on Windows
How can I load/import my MIB files into PRTG or IPCheck?
Installing the SNMP service on Windows NT/2000/XP/2003
Finding MIB files for specific devices or systems
Websites and Online Tools (2)
Port Scanning and Security Tools on the Web
The Zope Lounge for ZOPE users
IPCheck Server Monitor V5
IPCheck Server Monitor V5 (9)
Where can I find error logs when running into trouble with IPCheck?
How does IPCheck Server Monitor calculate the uptime/downtime values?
Monitoring the thread count of active processes via WMI Query sensors
How to update to the latest version of IPCheck Server Monitor
Testing WMI Requests
What to do when getting the 'Code Error 80041010 - Invalid Class' error while creating or using WMI sensors
Top 5 Reasons for Notification Problems - Why don't I get notifications from IPCheck Server Monitor? => Hints for debugging
How can I load/import my MIB files into PRTG or IPCheck?
Do I need PRTG Traffic Grapher or IPCheck Server Monitor?
Common Pre-Sales Questions (2)
How many sensors can I monitor using IPCheck Server Monitor?
Do I need PRTG Traffic Grapher or IPCheck Server Monitor?
Common Technical Problems (15)
Where can I find error logs when running into trouble with IPCheck?
The HELP function of my Paessler product does not work on Vista or Longhorn
Monitoring the thread count of active processes via WMI Query sensors
How to update to the latest version of IPCheck Server Monitor
How does the scheduling for sensor requests work in IPCheck Server Monitor?
Testing WMI Requests
What to do with "This program has been damaged" messages when starting Paessler programs
What to do when getting the 'Code Error 80041010 - Invalid Class' error while creating or using WMI sensors
Top 5 Reasons for Notification Problems - Why don't I get notifications from IPCheck Server Monitor? => Hints for debugging
Installing the SNMP service on Windows NT/2000/XP/2003
Checking and debugging your local IPs
Solving "Could not connect" or "Error 10060" Messages when using SNMP
Experiencing "TCP/IP has reached the security limit imposed on the number of concurrent TCP connect attempts" with IPCheck
How to run the websites of IIS5/6 and IPCheck on one machine
Why do I see requests from IPCheck or www.paessler.com in my web log?
Custom Sensor Samples (8)
IPCheck Custom Sensor: Reading Free Disk Bytes from local or remote computer using WMI
IPCheck Custom Sensor: Reading Windows Performance Counters from local or remote computer
Creating a Custom Sensor DLL for IPCheck Server Monitor using Delphi
Creating a Custom Sensor EXE for IPCheck Server Monitor using Delphi
Monitoring numeric non-integer SNMP values with IPCheck Server Monitor
Remotely Monitoring Free Disk Space on a PHP Enabled Web Server With IPCheck Server Monitor
Creating a custom sensor that uses multiple PINGs to monitor WAN networks
Fileinfo: Monitoring file parameters with IPCheck using a custom EXE Sensor
Data Storage and Access (7)
How to update to the latest version of IPCheck Server Monitor
Where can I find error logs when running into trouble with IPCheck?
Documentation of the TEXTLIST interface of IPCheck Server Monitor and PRTG Network Monitor
How IPCheck stores its data. How to backup IPCheck's data.
Accessing the monitoring data of IPCheck Server Monitor
How to move an installation of IPCheck Server Monitor
How to change the storage drive and folder for the database of IPCheck Server Monitor
Notification Related Topics (7)
How does IPCheck Server Monitor calculate the uptime/downtime values?
How does the scheduling for sensor requests work in IPCheck Server Monitor?
Top 5 Reasons for Notification Problems - Why don't I get notifications from IPCheck Server Monitor? => Hints for debugging
Sending notifications via SNMP traps from IPCheck Server Monitor
Sending SYSLOG notifications with IPCheck Server Monitor
Posting notifications into the Event Log with IPCheck Server Monitor
How does IPCheck process sensor notifications? (Flowchart)
Project Design and Planning (4)
Planning large installations of IPCheck Server Monitor
Monitoring the thread count of active processes via WMI Query sensors
How to update to the latest version of IPCheck Server Monitor
What to do when getting the 'Code Error 80041010 - Invalid Class' error while creating or using WMI sensors
Publishing Monitoring Results (4)
Publishing Monitoring Results using Published Groups and IFRAMEs
Publishing Monitoring Results using a PHP Script (Alternative 1)
Publishing Monitoring Results using a PHP Script (Alternative 2)
Documentation of the TEXTLIST interface of IPCheck Server Monitor and PRTG Network Monitor
Sensor Related Topics (20)
How does IPCheck Server Monitor calculate the uptime/downtime values?
Monitoring System Parameters like Memory, CPU and Disks on Linux Systems via SNMP
How to find out OIDs for Custom SNMP sensors
Monitoring the thread count of active processes via WMI Query sensors
How does the scheduling for sensor requests work in IPCheck Server Monitor?
Testing WMI Requests
What to do when getting the 'Code Error 80041010 - Invalid Class' error while creating or using WMI sensors
How do I install the SNMP daemon on Linux machines?
How can I load/import my MIB files into PRTG or IPCheck?
Monitoring numeric non-integer SNMP values with IPCheck Server Monitor
Remotely Monitoring Free Disk Space on a PHP Enabled Web Server With IPCheck Server Monitor
Creating a custom sensor that uses multiple PINGs to monitor WAN networks
Fileinfo: Monitoring file parameters with IPCheck using a custom EXE Sensor
Using CMD/Batch Files as Custom Sensors in IPCheck Server Monitor
What to look for if an IPCheck sensor reports a "down" state
How to Set Up HTTP Transaction Sensors for IPCheck Server Monitor
Creating a custom PING sensor with millisecond warning and error configuration
Using SNMP GET requests in a Custom Script Sensor
Using phpSysInfo to monitor the system health of a PHP webserver with IPCheck Server Monitor
Setting up SQL Server Sensors for MS-SQL, MySQL and Oracle with IPCheck Server Monitor
Tips and Tricks (IPCheck 5) (10)
Command Line Parameters and Exit Codes for Paessler Setups
Remotely Monitoring Free Disk Space on a PHP Enabled Web Server With IPCheck Server Monitor
Changing IPCheck's program name and upgrade URLs shown in the WebGUI
How to change the storage drive and folder for the database of IPCheck Server Monitor
How to set up audible notifications for PRTG and IPCheck using speech synthesis software
Using phpSysInfo to monitor the system health of a PHP webserver with IPCheck Server Monitor
Remotely Updating Remote Probe Installations for IPCheck Server Monitor
Monitoring the thread count of active processes via WMI Query sensors
Monitoring one IPCheck instance with another instance of IPCheck
Testing WMI Requests
Licensing and Maintenance
Licensing and Maintenance (3)
Are Maintenance, Support, and Updates included in the list prices?
If I buy one edition (e.g. Professional) now can I later upgrade to a higher edition (e.g. Enterprise)?
Do I need PRTG Traffic Grapher or IPCheck Server Monitor?
PRTG Network Monitor 7
PRTG Network Monitor 7 (16)
HowTo Customize PRTG Login Screen
PRTG Network Monitor 7 Version History
Data Publishing and Map/Dashboard Features of PRTG Network Monitors
Overview: PRTG 7 Data Storage and System Requirements
PRTG Network Monitor Version History (7.0-7.1)
System Requirements for PRTG Network Monitor 7
How PRTG's VoIP Features (QoS, and IP SLA Sensors) are Different or Unique as Compared to Competitive Solutions
HowTo Change Report Templates
HowTo: Automatically Exporting PRTG's Raw Monitoring Data Into Daily CSV or XML Files
Installing a Trusted SSL Certificate for PRTG for Free
Secure PRTG Web Interface Connection
Overview: Interactive Maps and Dashboards in PRTG
Reporting Features of PRTG Network Monitor
Supported Sensor Types in PRTG Network Monitor
Auto Discovery of PRTG Network monitor
Security Features of PRTG Network Monitor
Common Technical Problems (7)
Troubleshooting Share Monitoring Under PRTG 7
Configuration Tips for Cisco Routers and PRTG
Paessler's Guide to Troubleshooting WMI Problems
What To Do if Sensors Show a ‘Not Licensed’ Message
PING Sensors Show Very High or Negative Request Times in PRTG
HowTo: Send Status Messages from PRTG to Twitter Using PTF Twitter
Solving Connection Refused Socket Error # 10061 in Windows GUI
Data Storage (5)
HowTo: Automatically Exporting PRTG's Raw Monitoring Data Into Daily CSV or XML Files
How to move an installation of PRTG 7 to another computer
How does PRTG Network Monitor 7 store its data?
How do I backup all data and configuration of my PRTG installation?
How to Define a Different Drive / Data Directory for PRTG 7 installations
Project Design and Planning (4)
Planning Large Installations of PRTG Network Monitor 7
How to Install a Custom SSL Certificate from a Microsoft CA Server
Working with Multiple Probes and Remote Probes in PRTG 7
How to Script Notifications for PRTG 7
Sensor Setup (8)
Setting up SQL Server Sensors for MS-SQL, MySQL and Oracle
FTP Sensor Configuration
HTTP Content Sensor Configuration
DNS Sensor Configuration
HTTP Sensor Configuration
HTTP Advanced Sensor Configuration
HTTP Transaction Sensor Configuration
Configuration Tips for HTTP Transaction Sensors
Tips and Tricks (PRTG 7) (37)
HowTo Customize PRTG Login Screen
PRTG API Documentation
Troubleshooting Share Monitoring Under PRTG 7
Command Line Parameters and Exit Codes for Paessler Setups
Setting up SQL Server Sensors for MS-SQL, MySQL and Oracle
Channel Definition for Custom Packet Sniffing or Netflow Sensors Under PRTG Network Monitor 7
Publishing Monitoring Results using a PHP Script (Alternative 1)
Safely Publishing Your PRTG 7 Data
PRTG 7 Placeholder Overview
Publishing Monitoring Results using a PHP Script (Alternative 2)
Using Graphs from PRTG Network Monitor in Other Webpages
How to Install a Custom SSL Certificate from a Microsoft CA Server
Documentation of SNMP Traps sent by PRTG
Documentation of the TEXTLIST interface of IPCheck Server Monitor and PRTG Network Monitor
Installing a Trusted SSL Certificate for PRTG Network Monitor Using InstantSSL
Filter Rules for Custom Packet Sniffing or Netflow Sensors Under PRTG Network Monitor 7
How To Change the Port Used for Report Generation
Configuration Tips for HTTP Transaction Sensors
Using PageGate to Relay Notifications under PRTG Network Monitor
How To Translate PRTG 7 Into Other Languages
How does PRTG compute CPU Index, Traffic Index and Response Time Index?
How to Define a Different Drive / Data Directory for PRTG 7 installations
What To Do if Sensors Show a ‘Not Licensed’ Message
Turning off all SUM channels in a PRTG Network Monitor configuration
How to Set Up a PRTG 7 Probe on Amazon EC2
How to Script Notifications for PRTG 7
How To Reboot a Computer via Windows Management Instrumentation (WMI) Call
How PRTG's VoIP Features (QoS, and IP SLA Sensors) are Different or Unique as Compared to Competitive Solutions
HowTo Change Report Templates
HowTo: Automatically Exporting PRTG's Raw Monitoring Data Into Daily CSV or XML Files
Installing a Trusted SSL Certificate for PRTG for Free
HowTo: Send Status Messages from PRTG to Twitter Using cURL
HowTo: Send Status Messages from PRTG to Twitter Using PTF Twitter
How to Set Up a PRTG 7 Core Server on Amazon EC2
Monitoring Cisco ASA Firewalls with PRTG using Netflow 9
Upgrading and Migration (3)
Importing Data from PRTG Traffic Grapher 6 or IPCheck Server Monitor 5
Introduction to PRTG 7 for IPCheck 5 users - What's new? What's different?
Introduction to PRTG 7 for PRTG 6 users - What's new? What's different?
PRTG Traffic Grapher V6
PRTG Traffic Grapher V6 (26)
Analyzing runtime problems of PRTG Traffic Grapher
Customizing Panel Layouts for Custom Graphs
Why do I see Huge Peaks or Spikes in Graphs for SNMP Sensors?
What is shown in the "Coverage" column in data tables of PRTG Traffic Grapher?
How can I change the colors of the sensor list in the web interface of PRTG Traffic Grapher
Using live graphs from PRTG in other webpages using static image URLs
Upgrading from PRTG Version 3 to Version 6
Upgrading from PRTG Version 4 to Version 6
How to Discern Excessive Bandwidth Usage using PRTG Traffic Grapher
Changing existing PRTG custom sensors from Delta to Gauge (and vice-versa)
Binding historic datasets to new sensors and recalculating historic data for an individual sensor
How to update to the latest version of PRTG Traffic Grapher
No data displayed in PRTG Live Graph
What to do if the PRTG service does not start after shutting down the GUI
What does the OTHER channel mean in PRTG Traffic Grapher
Does my Cisco device (Router/Switch) support NetFlow Export?
Details about the meaning of the "Busy Sensors" value in PRTG Traffic Grapher
Solving "Could not connect" or "Error 10060" Messages when using SNMP
Why we do not recommend installing software via Remote Desktop
Issues with SNMP Helper Pro / Packet Sniffer sensors caused by DEP settings
Installation of PRTG Traffic Grapher on Ubuntu with Wine
How can I load/import my MIB files into PRTG or IPCheck?
Do I need PRTG Traffic Grapher or IPCheck Server Monitor?
Do I need the Freeware Edition or PRTG or one of the Commercial Editions?
PRTG Traffic Grapher Version History (V4-6)
How PRTG Traffic Grapher stores its data
Common Pre-Sales Questions (8)
Can I monitor the individual bandwidth usage of each port of my router?
How many sensors can I monitor using PRTG Traffic Grapher?
Does my Cisco device (Router/Switch) support NetFlow Export?
Can I monitor the bandwidth usage of different protocols?
Do I need PRTG Traffic Grapher or IPCheck Server Monitor?
Do I need the Freeware Edition or PRTG or one of the Commercial Editions?
Can I monitor the traffic of several computers using one leased line?
Can I monitor the traffic of several websites running on one machine?
Common Technical Problems (30)
Using Paessler Network Card Packet Counter to debug problems with PRTG
How to run the websites of IIS5/6 and PRTG on one machine
Planning large installations of PRTG Traffic Grapher
How to set up traffic monitoring with PRTG for various infrastructures
The HELP function of my Paessler product does not work on Vista or Longhorn
Why PRTG may stop recording data as soon as the Windows GUI is closed
PRTG service is not started (Event ID 7000/Error 193 in system log)
Checking and debugging your local IPs
Changing existing PRTG custom sensors from Delta to Gauge (and vice-versa)
Binding historic datasets to new sensors and recalculating historic data for an individual sensor
Using Paessler SNMP Tester to debug SNMP problems with PRTG
How to update to the latest version of PRTG Traffic Grapher
No data displayed in PRTG Live Graph
What to do if the PRTG service does not start after shutting down the GUI
Using Paessler Netflow Tester to debug NetFlow installations
How to move an installation of PRTG Traffic Grapher to another computer
What to do if PRTG shows a "Multiple Instances Detected" message
How to change the data storage drive and folder of PRTG Traffic Grapher
What does the OTHER channel mean in PRTG Traffic Grapher
What does the sensor name "Error converting OID" mean when creating sensors using an OIDLIB in PRTG
What to do with "This program has been damaged" messages when starting Paessler programs
Details about the meaning of the "Busy Sensors" value in PRTG Traffic Grapher
Solving "Could not connect" or "Error 10060" Messages when using SNMP
Why we do not recommend installing software via Remote Desktop
Issues with SNMP Helper Pro / Packet Sniffer sensors caused by DEP settings
Installation of PRTG Traffic Grapher on Ubuntu with Wine
Installing the SNMP service on Windows NT/2000/XP/2003
Analyzing runtime problems of PRTG Traffic Grapher
Why do I see Huge Peaks or Spikes in Graphs for SNMP Sensors?
What is shown in the "Coverage" column in data tables of PRTG Traffic Grapher?
Data Storage and Access (10)
How PRTG Traffic Grapher stores its data
Upgrading from PRTG Version 3 to Version 6
Upgrading from PRTG Version 4 to Version 6
Changing existing PRTG custom sensors from Delta to Gauge (and vice-versa)
Binding historic datasets to new sensors and recalculating historic data for an individual sensor
How to update to the latest version of PRTG Traffic Grapher
How to move an installation of PRTG Traffic Grapher to another computer
What do the values in PRTG's exported CSV log file say?
How to change the data storage drive and folder of PRTG Traffic Grapher
How RAM memory is allocated when using top lists in PRTG Traffic Grapher
Project Design and Planning (14)
Planning large installations of PRTG Traffic Grapher
Netflow 5 Filter Parameters supported by PRTG Traffic Grapher
How to set up traffic monitoring with PRTG for various infrastructures
Comparing PRTG's SNMP based monitoring with Netflow Monitoring and Packet Sniffer based monitoring
How to Discern Excessive Bandwidth Usage using PRTG Traffic Grapher
Changing existing PRTG custom sensors from Delta to Gauge (and vice-versa)
Binding historic datasets to new sensors and recalculating historic data for an individual sensor
How to update to the latest version of PRTG Traffic Grapher
Using Paessler Netflow Tester to debug NetFlow installations
How to move an installation of PRTG Traffic Grapher to another computer
Does my Cisco device (Router/Switch) support NetFlow Export?
How RAM memory is allocated when using top lists in PRTG Traffic Grapher
Why we do not recommend installing software via Remote Desktop
How PRTG's VoIP Features (QoS, and IP SLA Sensors) are Different or Unique as Compared to Competitive Solutions
SNMP Related Topics (12)
Changing existing PRTG custom sensors from Delta to Gauge (and vice-versa)
What does the sensor name "Error converting OID" mean when creating sensors using an OIDLIB in PRTG
Solving "Could not connect" or "Error 10060" Messages when using SNMP
Issues with SNMP Helper Pro / Packet Sniffer sensors caused by DEP settings
How can I load/import my MIB files into PRTG or IPCheck?
Installing the SNMP service on Windows NT/2000/XP/2003
SNMP, MIBs and OIDs - an Overview
Finding MIB files for specific devices or systems
How do I install the SNMP daemon on Linux machines?
Using Paessler SNMP Tester to debug SNMP problems with PRTG
Monitoring System Parameters like Memory, CPU and Disks on Linux Systems via SNMP
How to find out OIDs for Custom SNMP sensors
Tips and Tricks (PRTG 6) (24)
Serving Web Pages of PRTG Traffic Grapher With Other Web Servers
Why do I see Huge Peaks or Spikes in Graphs for SNMP Sensors?
Monitoring System Parameters like Memory, CPU and Disks on Linux Systems via SNMP
Automated License Key Installation for PRTG Traffic Grapher
How to find out OIDs for Custom SNMP sensors
Changing the port number of a sensor in the .prtg file manually
How to Discern Excessive Bandwidth Usage using PRTG Traffic Grapher
Changing existing PRTG custom sensors from Delta to Gauge (and vice-versa)
Binding historic datasets to new sensors and recalculating historic data for an individual sensor
How to update to the latest version of PRTG Traffic Grapher
No data displayed in PRTG Live Graph
What to do if the PRTG service does not start after shutting down the GUI
How to move an installation of PRTG Traffic Grapher to another computer
How to change the data storage drive and folder of PRTG Traffic Grapher
What does the OTHER channel mean in PRTG Traffic Grapher
How to set up audible notifications for PRTG and IPCheck using speech synthesis software
How RAM memory is allocated when using top lists in PRTG Traffic Grapher
Why we do not recommend installing software via Remote Desktop
Installation of PRTG Traffic Grapher on Ubuntu with Wine
Secure PRTG Web Interface Connection
Command Line Parameters and Exit Codes for Paessler Setups
Customizing Panel Layouts for Custom Graphs
How can I change the colors of the sensor list in the web interface of PRTG Traffic Grapher
Using live graphs from PRTG in other webpages using static image URLs
SNMP Helper
SNMP Helper (8)
Recommendations for MS Exchange Server Monitoring using SNMP Helper
Recommended CPU Related SNMP Helper Sensors
Performing Silent Installations of SNMP Helper Freeware and SNMP Helper Pro
Recommended Disk Related SNMP Helpers Sensors
Recommended Memory Related SNMP Helpers Sensors
Monitoring Activity and Load of Specific Processes Using SNMP Helper Pro
Tips for MS SQL Server Monitoring using SNMP Helper
Issues with SNMP Helper Pro / Packet Sniffer sensors caused by DEP settings
Common Pre-Sales Questions (0)
Common Technical Problems (5)
Why can't I access performance counters after installing SNMP Helper?
The HELP function of my Paessler product does not work on Vista or Longhorn
Performing Silent Installations of SNMP Helper Freeware and SNMP Helper Pro
After installing SNMP Helper on a device I don't see any disk drive counters
Issues with SNMP Helper Pro / Packet Sniffer sensors caused by DEP settings
Recommended Performance Counters (6)
Recommended CPU Related SNMP Helper Sensors
Recommended Disk Related SNMP Helpers Sensors
Recommended Memory Related SNMP Helpers Sensors
Monitoring Activity and Load of Specific Processes Using SNMP Helper Pro
Tips for MS SQL Server Monitoring using SNMP Helper
Recommendations for MS Exchange Server Monitoring using SNMP Helper
Webserver Stress Tool
Webserver Stress Tool (14)
Book Recommendations for Webserver Load and Performance Testing
Removing XP SP2's limitation on outgoing TCP connection attempts
Recording HTTP URLs for Complex Web Applications
The HELP function of my Paessler product does not work on Vista or Longhorn
What are the benefits of using Webserver Stress Tool?
Webserver Stress Tool: What it does - and what not
Why does Webserver Stress Tool show errors when I run it against my server? When I access the website with my browser I don't see errors.
The Basics of Webserver Performance Testing
Load and Stress Testing SOAP Servers and SOAP Services
How can I define my own functions in URL Scripts for Webserver Stress Tool
What to do with "This program has been damaged" messages when starting Paessler programs
Achieving maximum HTTP requests per second with Webserver Stress Tool
Avoiding "10048 (Address already in use.)" Errors in Webserver Stress Tool
Reusing data from the HTML code of a webpage (e.g. session id) for subsequent requests
Common Pre-Sales Questions (5)
What are the benefits of using Webserver Stress Tool?
How long does it take to learn the usage of Webserver Stress Tool?
Webserver Stress Tool: What it does - and what not
What volume and throughput can Webserver Stress Tool cope with?
What environment is needed to run Webserver Stress Tool?
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