Nagios Support Forum

I get this error when i go to the Web GUI; I also get this error "Error: Connection activation failed: No suitable device found for this connection" i am no sure why i am getting this when Nagios has been activated and running for some time? Please help.

Hi,

Did you make any changes to the network settings recently? Based on the error message, it looks like the network device is not available. Try rebooting the server, and post the output to the following commands.

1. Network interfaces 2. Is Apache running 2. Are you able to ping an outside website 3. Is Port 80/443 open on the server

No changes were made. I came back from the weekend and went to do my daily check, because Nagios was quiet over the weekend. Restart completed. and i have to upload a picture to show the output cut and paste is disabled because outty and winscp are not able to connect.

The only change we made Friday before we left was the activation of Nagios would that have done it?

Hello,

According to the ip command output, this server is using an IPv6 address, but the server address is an IPv4 address. You'll need to edit the network scripts file for the interface to set the correct IP address, the re-start the network.

Is this server using a static IP address?

See: https://www.cyberciti.biz/faq/howto-set ... iguration/

So i looked at what connections i could but not sure where IPv6 is enabled. Included a picture. Your link talks about eth0 and it shows i have it to but than my connections show ens33 show up as my connection. Always has. Any thoughts?

Hello,

There's no eth0 configuration defined, so this must be set in the ifcfg-ens33 file. Can you post the output of the configuration for us to check the settings? Also, the following KB article on how to configure Nagios XI with a static IP address may be helpful.
Configuring Your Server With A Static IP Address

Here is the output

I got it to work ty for the suggestions

Hi,

That does look ok. Set the following: IPV6_AUTOCONF=no and there is typo: What does the ifcfg-Ethernet-connection_1 specify? Are you able to bring up the ens33 device? The issue here is you've set a static IP address but it's not coming up. If you can't get it working, following the steps in our KB article from the beginning.
https://support.nagios.com/kb/article/c ... s-549.html