What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

Remote probes sporadically disconnect




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

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

5 Replies



Please open a Support Ticket or send an email to [email protected] as regards this issue.

Created on Oct 1, 2012 2:06:11 PM by  Patrick Hutter [Paessler Support] (7,225) 3 3




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]



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



Which version are you currently using?

Created on May 29, 2013 9:49:07 AM by  Patrick Hutter [Paessler Support] (7,225) 3 3



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

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.