Hi Folks,

we have a strange "Problem".

Our PRTG Server is virtualised on vmware (Win2016, 16gb, 4cores). formaly we had a 2008r2 server and copied the configuration.

From time to time the prtg server is not able to ping remote devices and sets the sensor on red. Other servers in the same vlan, on the same virtual host can ping and transfer data to effected hosts without problems.

It is not every time the same sensor/target, when we reboot the server the problem is gone.

Has anybody an similar issue?

regards, sebastian

Article Comments

Hello Sebastian,


Please try to ping your hosts via Windows CMD from your PRTG Server. If you can ping them while the Ping Sensor isn't able to, i will contact you per mail to send me your support bundle, so I can take a closer look.
If you can't ping them there either, i assume there are some wrong Server or Networks settings?


Aug, 2019 - Permalink

Hi Timo,

no it is defenatly a Windows Problem. When the error occurs you can't ping the target from windows.

Does everyone knows something about limits? Maybe to less open ports on Windows side?

Regards, Sebastian


Aug, 2019 - Permalink

Good day, we have just installed PRTG on a new Windows Server and are having this same problem. Interested in hearing what everyone finds. We have tracked the packets from the PRTG server to the remote device and back, they are definitely dyeing on the PRTG Server when they return. It even affects CMD pings.

The only way around it is to change the physical IP of the server or wait.

Thanks, Tom


Jun, 2021 - Permalink