Why server unexpectedly closed network connection?

Question

I'm using a public key on the server and a private key on my local for authentication. Also I access databases on my server through tunneling.

But sadly when I leave that connection alone for about 1 min, that connection will be closed. Why? How can I make it alive forever (until I close it)?

Answer 1

In your session properties, go to Connection and under Sending of null packets to keep session active, set Seconds between keepalives (0 to turn off) to e.g. 300 (5 minutes).

Source: https://patrickmn.com/aside/how-to-keep-alive-ssh-sessions/