Why does ssh X forwarding timeout after a while?

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Chapters
00:00 Question
00:53 Accepted answer (Score 29)
01:25 Answer 2 (Score 20)
01:52 Thank you

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Full question
https://superuser.com/questions/407218/w...

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Tags
#ssh #x11forwarding

#avk47

ACCEPTED ANSWER

Score 29

The default ForwardX11Timeout is 20 minutes for ssh -X, but you can set it to something large (e.g. 7d for 7 days) in .ssh/config

"Trusted" X11 forwarding via ssh -Y actually enables potentially nasty things like keystroke monitoring and screen grabs.

ANSWER 2

Score 20

Using -X, X11 forwarding is enabled in "Untrusted" mode, making use of various X11 security extensions, including a time-limited Xauth cookie.

Use -Y to enable "Trusted" mode for X11, which will enable complete access to your X11 server.