What is the default address ip of nagios server?
Re: What is the default address ip of nagios server?
Guessing, but it looks like your trying to resolve an nrpe check issue, server can't connect to monitored host nrpe? You're editing /etc/nagios/nrpe.cfg on the remote host? That means literally replace <Nagios ip server> with the IP address of the Nagios server. Then nrpe on the server will be allowed to talk to nrpe on the monitored host.
Re: What is the default address ip of nagios server?
The address of a nagios host depends on the network it lives in.