Hi all, I've been struggling with getting my X forwarding over SSH working. After some time, I found that there were two entries in my .Xauthority file that have #ffff## as a hostname, which break forwarding.
The relevant entries in my .Xauthority files were: #ffff##: MIT-MAGIC-COOKIE-1 <snipped> #ffff##: XDM-AUTHORIZATION-1 <snipped> localhost/unix:10 MIT-MAGIC-COOKIE-1 <snipped> From the strace output, it seems that xlib always sends the XDM-AUTHORIZATION-1 entry, even when DISPLAY=localhost:10.0. From the xauth manpage, I couldn't find what these #ffff## entries are supposed to do, let alone why they break my X/ssh forwarding. I'm apparently not the first to spot this, since I've spotted a script [1] which deliberately strips these entries from a .Xauthority file for this very reason. Can anyone shed some light on what happens here? Gr. Matthijs (Please CC me, I'm not subscribed) [1]: http://isg.ee.ethz.ch/tools/isgtc/index.cgi?page=module_source;module=xauthclean;source=xauthclean
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