Nagios Support Forum

I get these for all my exchange checks periodically. Connection Refused
I check exchange and it is fine, all other checks from nagios are fine, just exchange.
Is anyone else having this problem?

So the same service works sometimes but returns as connection refused the rest of the time? Normally connection refused is some sort of firewall or net filter, but that's pretty odd if it's sporadic like that. Are there any net filters between the Nagios server and Exchange server?

No filters, they are both VM's in the same vcenter cluster, on the same network space.
Last time it did this was the 23rd and the 20th before that

Both of the other times it recovered in 10 min, this time was 3 hours 10 min
Yet mail traffic was fine

Very odd indeed. Can you verify that selinux is disabled?

[ronb@nagios ~]$ setenforce 0
setenforce: SELinux is disabled
[ronb@nagios ~]$

Let us know if the problem resurfaces. You've disabled selinux already, so that could not be a factor anymore.

Ok, will do

it did it again last night, from 1140 until 607am
yet mail was flowing nicely, i was receiving other mail while it was being reported and connection refused.

Help

Does this happen at approximately the same time? Anything interesting in the log files?

different times, and tail does not work.