CEO's Blog

Thursday, February 28 2008

eWeek Mid-Market Covers our Announcement of PRTG 7

After an email interview with CEO Dirk Paessler eWeek author Karen D. Schwartz of Ziff-Davis has written yesterday in her article about our announcement of PRTG Network Monitor 7:

Quote:

"... Network monitoring tool vendor Paessler is keeping up with the big guys in its efforts to provide a feature-rich network monitoring tool that’s streamlined and affordable. ... With the new product, Paessler is going head-to-head with well-entrenched vendors ..."

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Tuesday, February 26 2008

Paessler Announces PRTG Network Monitor Version 7 for CeBIT 2008

We proudly announce PRTG Network Monitor Version 7. PRTG 7 combines the features and capabilities of Paessler’s IPCheck Server Monitor V5 and PRTG Traffic Grapher V6 in one solution for comprehensive, cost-effective and easy-to-use network monitoring.

We will present the new PRTG Network Monitor at CeBIT 2008, March 4-8 in Hannover, Germany, booth E38 in hall 3.

Read more about it in our latest press release.

Stay tuned for more detailed information about this exciting new software in the coming weeks!

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Monday, February 11 2008

Error 80041010 'Invalid Class' messages while working with WMI

When working with WMI (Windows Management Instrumentation) and experiencing problems with the error code "80041010" and the message "Invalid Class", usually the problem is caused by some required WMI classes that are not properly registered in the Windows system. The solution is to (re-)register all the WMI classes.

Read our latest knowledgebase article What to do when getting the 'Code Error 80041010 - Invalid Class' error while creating or using WMI sensors for more details.

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Friday, February 08 2008

A new version of Webserver Stress Tool is available

Today we have published a new version of Webserver Stress Tool (7.2.1) which is mainly a Maintenance Release and covers two bugfixes:

• For HTTPS webpages downloading of images with relative image URLs used HTTP instead of HTTPS


• Bugfix: Fixed some optical issues on Microsoft Vista

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Friday, February 01 2008

AMD's "Cool'n'Quiet" and Intel's "SpeedStep" can cause incorrect measurements for PRTG and IPCheck

The two powersaving technologies for CPUs called Cool'n'Quiet (AMD) or Speedstep (Intel) can cause monitoring products like our PRTG and IPCheck to take incorrect measurements, especially when PRTG is run on a virtual machine on such a hardware.

When we ran PRTG 6 on a virtualized Windows XP machine running on VMWare server on an Ubuntu/Linux host we saw strange peaks of traffic and gaps in the graphs. After some investigation we found that the internal timers of the Windows machine sometimes slowed down (compared to real time) and ran faster later to catch up.

Thus the PRTG 6 monitoring station showed readings for the bandwidth measurements that were too high and too low (the counter deltas are divided by time to calculate the speed).

In order to run PRTG 6 (and other products that rely on exact timing) on such a virtualized machine it is necessary to

• Disable "Cool'n'Quiet" or "SpeedStep" in the host's BIOS


• Enable "Time synchronization between virtual machine and host operating system" in the VMWare Tools applet which can be found in the Windows Tray inside the virtual system

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