If you have a Mac and keep getting choked when your SSH session says Write failed: Broken pipe after some inactivity. What you need to do is edit /etc/ssh_config

 
# /etc/ssh_config
ServerAliveInterval 120

That should fix it. Also if it ever does hang you can kill the session without closing the tab by typing ~. and hitting enter.

Related External Links:

• Stack Exchange - how-can-i-prevent-an-ssh-session-from-hanging-in-os-x-terminal