Nagios Support Forum

I understand, but pro-active firewalls will block on the fly like this. The same goes for the switch. Do you have any fire walls running, or anti-virus software that you can look at?

I know some anti-virus will include 'network intrusion' which has blocked this in the past.

rkennedy wrote:I understand, but pro-active firewalls will block on the fly like this. The same goes for the switch. Do you have any fire walls running, or anti-virus software that you can look at?

I know some anti-virus will include 'network intrusion' which has blocked this in the past.

Firewall - no.
The switch has no firewall rules actually.

Do any client systems have firewalls, or antivirus? The fact that the pings work sometimes, and not other times really makes me believe this isn't a Nagios issue.

As @Box293 mentioned, if you can leave a ping running for a few hours it might help to see where it captures. You could also run a traceroute to see where it's getting held up.

Are you using Mod-Gearman ? If you are, and have remote workers, then it's possible that they are the ones with the problem, not the Nagios server.

Box293 wrote:Are you using Mod-Gearman ? If you are, and have remote workers, then it's possible that they are the ones with the problem, not the Nagios server.

The server itself doesnt ping, its not a nagios problem.

See the video,
https://youtu.be/UZWhlsRDV1E

rkennedy wrote:Do any client systems have firewalls, or antivirus? The fact that the pings work sometimes, and not other times really makes me believe this isn't a Nagios issue.

As @Box293 mentioned, if you can leave a ping running for a few hours it might help to see where it captures. You could also run a traceroute to see where it's getting held up.

Already tried changing 3 switches, same issue.
You can see the video.

See the video,
https://youtu.be/UZWhlsRDV1E

You can see how 10.10.11.2 and 10.10.11.27 was not pinging, I refresh device ping instantly worked.

If I keep the ping on, then the device doesnt stop.

But I stop the ping and then try again after 5 mins, the device doesnt ping anymore.

This is not likely related to the nagios server.

What are those devices that you are changing configs on?

The likely causes are:

1. A firewall / IPS device that is blocking it. If there are any of these devices in the path then validate their logs to see what show.
2. A routing issue (are you using EIGRP/OSPF/BGP, etc? Asymmetric routing?) - Can you run a tcpdump on the remote device or on the switch to see if the packets are even getting there?
3. Are these devices behind a VPN connection? I've seen the same type of behavior with VPN tunnel issues because of settings (1 tunnel per host vs 1 tunnel per subnet).
4. An issue with some other device in the path.

Can you run a traceroute from the XI machine and see where it's dying at?

It dies right there, if you trace route.

I guess, I just have to change server, as he NIC seems faulty.

soamz wrote:I guess, I just have to change server, as he NIC seems faulty.

Give it a test, and let us know what happens!

hsmith wrote:

soamz wrote:I guess, I just have to change server, as he NIC seems faulty.

Give it a test, and let us know what happens!

ITS DONE!!!
Had to change all the 200+ devices IP to 10.10.12.xx
Now its amazing.

Is there a good flat UI theme for Nagios ?
And is there a way we can measure, traffic of each device and graphs in nagios of the hosts added ?

Right now, I use cacti and I dont like it, as Cacti is not showing accurate data as it polls in every 5 mins, very lame.

I like Nagios, all I need is a proper theme first, as the default one is very very basic

Need theme, graphs, traffic monitor for each host.