SSH not connecting (Nagios system)?

Question

linux

After installing Nagios, it does not connect via SSH (custom port 2233 was configured)
Only Nagios is available via the web interface. I did not come across this monitoring system myself. The previous admin used how to remove it painlessly?

Answer 1

Look at the status of ssh and the port it is listening on. OS what?

Answer 2

try nmap to scan the server, maybe the port will respond and you can use it!
Understanding the message, it rejects you because the number of connections may be exceeded or filtered by IP.

Answer 3

You have your Nagios monitoring system configured to poll SSH on the standard port, 22, while you have SSH configured on a non-standard port, 2233. Bring it all together. It's silly to watch the status of a port that no one is listening to.

Answer 4

Description is not clear. Have a host with Nagios and ssh on port 2233? Connect to port 2233 via ssh. Remove - depends on the os on the host, probably apt-get remove nrpe*