New Environment

This support forum board is for support questions relating to Nagios XI, our flagship commercial network monitoring solution.
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gregwhite
Posts: 206
Joined: Wed Jun 01, 2011 12:40 pm

New Environment

Post by gregwhite »

We are going to be building out a new hardware environment for NagiosXI. They will be changing the host name for the server to conform to new naming standards. Will this create any problems for NagiosXI as long as the IP address remains the same?

Thanks,
Greg
dchurch
Posts: 858
Joined: Wed Oct 07, 2020 12:46 pm
Location: Yo mama

Re: New Environment

Post by dchurch »

If you'll also be changing Linux distros (or updating, for instance Cent 7 => Cent 8), then it's an unknown. Here's a list of things I've seen happen in recent memory when people migrate to a new server:
  • The OS has a policy in place that prevents OpenSSL from using DH ciphers, which in turn prevents communication with NSClient++ - see here for tips/workaround
  • SELinux comes enabled on the server, which causes Nagios XI to just plain not work - please disable SELinux.
  • The network is suddenly IPv6-enabled and the IPv6 address needs to be whitelisted in the agent configs (NRPE, NCPA, xinetd) - please update the config to include the IPv6 address. This really only applies if the check is using the FQDN instead of the IP and the DNS has an AAAA record.
I'm still adding to this list. You really won't know what the pain points are until you try it.
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