Secure Shell
x forwarding over SSH Sep 24 2010 03:26AM
Han (keepsimple gmail com)

I am using SSH to do X forwarding and saw an interesting problem: for
some applications, even when I closed the application itself, the SSH
session is still not closed. For other applications, SSH sessions
closed whenever I closed the application.

For example, if I do:

ssh -X <host> xclock

then I close the xclock app, the ssh session exits.

but if I do:

ssh -X <host> firefox

then I close the firefox app, the ssh session does not exit.

In the latter case, I can see the corresponding sshd process is still
running at <host>. Is such behavior caused by the application? any
insights are appreciated.

my SSH version is:
OpenSSH_5.1p1 Debian-6ubuntu2, OpenSSL 0.9.8g


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