I'm currently trying to ssh to a colo, after 1 to 2 minutes of inactivity, I get:
superuser@thecolo:~$ Connection to 10.123.45.67 closed by remote host. Connection to 10.123.45.67 closed. mylocalmac:~ superuser$
As long as I am typing something in the ssh terminal, the connection is kept. As soon as 1 to 2 min of inactivity has happened, I will get the above message. The machine I'm trying to connect to is a Ubuntu 12.04.1 LTS 64 bit server edition. It's not a physical server but a guest VMware. I'm sshing from a mac terminal.
Please don't confuse this question with similar ones on this site with the keyword
ssh_exchange_identification in it, it's unrelated.