KeepAlive/ClientAliveInterval not working? Idle timeout.

[Bryce Nesbitt (mailing list account)]

I have set /etc/ssh/sshd_config with:
    KeepAlive yes
    ClientAliveInterval 3

However, no KeepAlive type messages seem to be sent.  I've verified this 
by looking at the network lights, which don't flicker every 3 seconds.

I am attempting to keep interactive ssh sessions alive longer.   If 
don't type anything for about 2 minutes, the sessions close.  If I run a 
"idle" script (which just prints to the screen every 30 seconds) the 
sessions stay open.  Sessions to a different host stay open, so I don't 
think it is a client problem.

  My client is ttsh on Windows 2000
  My server is OpenSSH 3.1p1 (from RedHat)
  My host is RedHat Linux

Is this a bug?  Does anyone have advice on keeping interactive terminal 
ssh sessions from timing out?

I have reviewed past posts to this list without luck.  This message 
about sshd timeouts was the closest topic:
http://marc.theaimsgroup.com/?l=openssh-unix-dev&m=103077014128847&w=2