Nagios permissions

By default, nagios will only allow a user called "nagiosadmin" to view host and service details. If you add other usernames to the nagios htpasswd file, you'll also need to add their names to /etc/nagios/cgi.cfg in the places where nagiosadmin is listed.

If not, you'll be able to authenticate to view Nagios pages, but they'll mostly say "It appears as though you do not have permission to view information for any of the services you requested...".