>>>>> "rich02818" == rich02818 writes:

rich02818> With ClientAliveInterval set to a non-zero value, openSSH
rich02818> server will send messages to an idle client and expect a
rich02818> response (according to the specs). What, exactly are these
rich02818> messages? The SSH client that I'm using does not seem to
rich02818> reply to this at all.

It sends a channel request of type keepalive@openssh.com, with "want
reply" set, on channel 0 (normally the shell channel). I don't think not
replying is an option -- the SSH-CONN RFC says that the receiver should
reply with success or failure, even if the request is not supported or
recognized. This seems like a bug. What client are you using?

rich02818> Thanks, Rich

--
Richard Silverman
res@qoxp.net