CEO's Blog

Wednesday, February 28 2007

Using phpSysInfo to monitor the system health of a PHP webserver

Using scripts from Open Source project phpSysInfo it is quite easy to set up a simple system-health monitoring on any webserver that can run PHP files. This feature can be monitored using IPCheck Server Monitor.

The trick is that phpSysInfo shows red bars as soon as the available memory, CPU resources or disk space fall below a certain threshold. These red bars are shown using GIFs images with the word "redbar" in their filename. Using an HTTP Advanced sensor we are monitoring that the resulting HTML from the script does not include the word "redbar". As long as this word is not included in the HTML the server works fine.

Read more in our Knowledge Base: Using phpSysInfo to monitor the system health of a PHP webserver with IPCheck Server Monitor

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Tuesday, February 27 2007

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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Tuesday, February 20 2007

How RAM memory is allocated when using top lists in PRTG Traffic Grapher

When using Toplists in PRTG Traffic Grapher for Packet Sniffers or NetFlow Collectors you should be aware that it can take a considerable amount of memory.

This knowledgebase article "How RAM memory is allocated when using top lists in PRTG Traffic Grapher" explains some details.

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Monday, February 19 2007

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, 2007, and end one week later on November 4, 2007, resulting in a new DST period that is four weeks longer than previously observed.

If your computer runs on an American or Canadian Timezone setting this situation affects your computer and software.

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Thursday, February 15 2007

Instructions on how to set up Port Forwarding - on almost any router

PortForward.com offers help for setting up port forwarding on many routers or firewalls. Most users are not aware of how to configure their router or firewall in order to use IPCheck's Remote Probes in a remote network (or to offer access to PRTG's or IPCheck's webinterface from outside of the network).

The same applies to Peer-to-Peer file sharing (PtoP), Internet Games, Web serving, FTP serving, WebCams, IRC DDC, and Instant Messaging such as AIM, ICQ, Yahoo and MS Messenger.

Quote:

Our Routers section offers detailed walkthroughs on how to setup port forwarding. These how to guides make it easy to setup your router or firewall for any application you may need.

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Thursday, February 01 2007

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 you to inspect all HTTP Traffic, set breakpoints, and "fiddle" with incoming or outgoing data.

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