I am trying to emulate a virtual network in Kathara (ex. NetKit), based on OSPF and BGP routing and I am new to this. After emulating the network I need to monitor it using Nagios, but my question is how is it possible? My virtual network is running on an Ubuntu distro, do I need another virtual machine where I should install Nagios, or how does it work exactly? I am new to these technologies and I don't really understand what point I am missing. From what I know Nagios should be installed on a server and the NRPE on the monitored one..but in this situation I just cannot see clearly.
Thank you in advance and excuse me if any mistakes have been made.