SSH hangs

[Steven Ringwald]

> I've had this happen using my OS X system and Ubuntu system.
> 
> I'll ssh in, can forward X applications, etc., but as soon as I type
> "exit" to close the session, it just seems to hang. I can only
> finally
> cut it off by opening another terminal and using kill on the "local"
> ssh
> process.
> 
> What causes this?  Anyone else run into it?

I have seen this when tunneling email ports, for instance, and logging out with an application (Thunderbird) still using the ports...

Steve