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Remote probes sporadically disconnect

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Hello!

I have a problem with remote probes sporadically losing connection to the PRTG Core server. Their logs show something like this:

27.09.2012 10:55:23 Login OK: Willkommen bei PRTG

30.09.2012 13:08:05 Disconnected from 10.2.9.34:23560

30.09.2012 13:08:13 Socket Error # 10054 Connection reset by peer. (will keep trying)

30.09.2012 13:08:23 Create new Connection

30.09.2012 13:08:48 Create new Connection

30.09.2012 13:09:12 Create new Connection

30.09.2012 13:09:37 Create new Connection

30.09.2012 13:10:01 Create new Connection

30.09.2012 13:10:25 Create new Connection

30.09.2012 13:10:50 Create new Connection

30.09.2012 13:11:14 Create new Connection

30.09.2012 13:11:38 Create new Connection

30.09.2012 13:12:03 Create new Connection

30.09.2012 13:12:16 10 connection attempts failed with error Socket Error # 10054 Connection reset by peer. (will keep trying)

Now the interesting thing - when I log on to the PRTG core server with RDP (or log off and then log on again if a session was already open) the remote probes log back in. This is reproducible, creating a new session on the PRTG server always solves the disconnect. Of course this can't be a permanent solution.

Do you know of any similar cases and a way this might be fixed?

Regards, Christian

disconnected logon remote-probe

Created on Oct 1, 2012 5:35:48 AM by  Christian Möller (0) 1



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Please open a Support Ticket or send an email to support@paessler.com as regards this issue.

Created on Oct 1, 2012 2:06:11 PM by  Patrick Hutter [Paessler Support] (7,164) 3 3



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Hello,

the error message "Socket Error # 10054 Connection reset by peer" hints on a firewall or something similar blocking the connection, which then may abandon the rule (which is blocking) as soon as an RDP-Connection to this Probe Host is opened. Sounds very strange, and we have to say that so far we have not encountered a similar issue to be honest.

best regards.

Created on Oct 1, 2012 2:13:59 PM by  Torsten Lindner [Paessler Support]



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I can confirm this is happening to me as well. No error message other than the disconnect.

5/28/2013 3:53:57 PM Probe Health Up 100 % 5/28/2013 3:53:23 PM Probe Health Down Disconnected

I would log into to the server that is holding the remote probe and after a certain amount of time, the probe will disconnect, and when I log into the server to check it, the server reconnects and the alarms go away.

Created on May 28, 2013 9:06:50 PM by  aaronG (0) 1



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Which version are you currently using?

Created on May 29, 2013 9:49:07 AM by  Patrick Hutter [Paessler Support] (7,164) 3 3



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Are there firewalls between the core server and that probe?

In that case - ask you nertwork admins if your firewalls do something like DPI-SSL (as it is called on Dell Sonicwalls). That was the problem for us - it does a kind of "man in the middle" on SSL connections to inspect encrypted traffic. And somehow DPI-SSL and PRTG don't seem to go together very well - we disabled DPI-SSL for the probe-port and had no problems ever since.

Regards, Christian

Created on May 29, 2013 10:42:28 AM by  Christian Möller (0) 1



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