To enable the keep alive system-wide (root access required), edit /etc/ssh/ssh_config
;
to set the settings for just your user, edit ~/.ssh/config
(create the file if it doesn’t exist). Insert the following:
Host * ServerAliveInterval 300 ServerAliveCountMax 2
You can also make your OpenSSH server keep alive all connections with clients by adding the following to /etc/ssh/sshd_config
:
ClientAliveInterval 300 ClientAliveCountMax 2
References
https://patrickmn.com/aside/how-to-keep-alive-ssh-sessions/