[13:30] <jrwren> I have 2 raspberry pi which I ssh to from my mac laptop. My mac laptop often goes to sleep (unsure if relevant). One raspberry pi keeps its ssh connection overnight. it is running libreelec which does not use pam (unsure if relevant). Second pi drops its connection. It is running raspbian. How do I make the second pi not drop its ssh connection overnight? All settings are default. No TMOUT envvar, 
[13:30] <jrwren> default ClientAliveInterval and ClientAliveCountMax in sshd_config.