[X4U] ssh connection hangs terminal

[John Masters]

Hi.

I have a VPS which I admin via ssh using ssh keys. When I ran Linux I  
would ssh-add the key, connect to the server and it would stay  
connected for weeks without problems. Could keep a term open for Mutt  
to read mail without a worry.

Connecting to the same server from my iMac things get a little flakey.  
If the connection is left open for any length of time (I haven't yet  
determined how long but it is less than 2 hours) the connection is  
lost, but worse, the terminal hangs. No response to keyboard. I can  
close the terminal and reopen but I then have to redo my ssh-add.

Following on from that, assuming I can find a cure, how can I keep the  
session alive if I sleep my Mac? Do I set the ServerAliveCountMax in  
ssh_config to infinity or set the ServerAliveInterval to some huge  
number of seconds?

Regards, john