> Looks like something changed during a recent upgrade to OpenSSH V5.1.
> When connecting to ScreenOS firewalls, the firewalls closes the
> connection as soon as authentication has passed.

I ran into something similar when using ServerAliveInterval in OpenSSH.
(This is a very useful feature of SSHv2 when your ssh session traverses a
firewall with short session timeouts.)  ScreenOS drops the connection as soon
as one of the keepalive packets shows up.  In this case, the connection
works for a while because keepalive packets get sent only on an otherwise
idle connection.

There is also an OpenSSH bug (OpenSSH_4.3p2 Debian-9etch2) where, if you set
ServerAliveInterval for any host in the ssh config file, it gets set for all
of them, including the default, so you may have it set without realizing it.
I don't know if the bug is fixed in later versions.

Rich Schultz
Tellme Networks
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