Welcome to WebmasterWorld Guest from 22.214.171.124
Forum Moderators: bakedjake
Therefore after some testing I added the following to my sshd_config:
The ClientAlive messages are sent over the encrypted channel between the endpoints of the connection, i.e. de server and the client. They will pass through the firewall. This will keep your connection running, even if it is idle for a long time.
(My DSL modem died at the weekend and the replacement started cutting off my idle SSH connections).