Keep SSH Sessions From Disconnecting
With the installation of new firewalls at work I’ve been getting disconnected a lot from hosts I SSH to, due to changes in the inactivity timeouts. It’s particularly inconvenient when I’m tailing a log that hasn’t changed in a while… and then the connection dies, and I don’t notice. Oops. It also happens in various other situations, like NAT through a home router, too. Let the connection sit for a while and you’ll have to recreate it. I could ask our network guys to change the timeouts, but it turns out there’s a better fix from the client side. SSH protocol version 2 supports server keepalive, essentially NOOPs sent to the server to keep the connection up. You can do …