I have just recently setup a PRTG Cluster, this consists of 3 Servers at 3 different locations...........
I have some servers not talking properly to one of the PRTG Cluster Servers, checking the sensor and under Cluster Node the PRTG Cluster Server is saying:
WMI: Connection could not be established (Port Error : RPC Server not accessible. - Host: XXXX-vhost1.XXXXX.internal, User: XXXXXXX, Password: **, Domain: ntlmdomain:XXXXXX (code: PE015) -- PerfCounter: Unable to connect to the specified computer, or the computer is offline. (Performance Counter error 0x800007D0)
The two other PRTG Nodes are all happy and green (OK), I also have other servers\devices within this group all happy on all three nodes
(Note I have amended the above error with XXXXX for secutiry reasons)
Checking Event Viwer on the PRTG Cluster Node I noiced this:
DCOM was unable to communicate with the computer XXXX-VHOST1 using any of the configured protocols; requested by PID 86c (E:\Program Files (x86)\PRTG Network Monitor\Sensor System\UserLoggedin.exe).