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

icmp #1231 error

Votes:

0

when I ping at command line, it works but in prtg, it shows the system is down 'icmp error #1231'.

It was working almost without any error.

what can be the problem?

error icmp prtg

Created on May 30, 2014 3:08:39 PM



2 Replies

Votes:

0

Hello,

thank you very much for your KB-Post. PRTG uses a standard Windows API Call to ping targets. So it just passes the target IP / Hostname to Windows, and Windows then in turn returns the ping response times, or errors. So here, Windows passes back the "ICMP #1231"-error.
It is an odd error though, please try if the suggestions from the folioing MSDN-Threads help:

best regards.

Created on Jun 3, 2014 8:29:43 AM by  Torsten Lindner [Paessler Support]



Votes:

0

It is working now!

Somehow the gateway ip was disappeared (i don't know how). Anyway it works and I appreciate your support.

Thanks,

Created on Jun 3, 2014 6:03:05 PM




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.