How can I find out why I can't connect via ssh?

Question

linux

On a virtual machine (not on my PC) there is cetos with zabbix (server, client and web face). Suddenly stopped connecting via ssh. I enter the command, I wait a long time, and then "Connection timed out". Ping - 5ms. It enters the web face. Is it possible to understand why this is happening using zabbix?

Answer 1

Look at what he writes at the time of login journalctl -fand look at the ssh status.

Answer 2

It's just guessing. I had a similar situation, in my case, some time after installing the server, there were ssh updates (on the client) and some encryption algorithms were turned off, but everything remained the same on the server. Adding
to .ssh/config helped