p.s. I was able to connect to other servers and tunnel X11 to them, at the same time as I was experiencing this issue with lucid.
$ grep -i family /etc/ssh/sshd_config $ $ grep 127 /etc/hosts 127.0.0.1 localhost 127.0.1.1 ubuntu $ ifconfig lo lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:297 errors:0 dropped:0 overruns:0 frame:0 TX packets:297 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:80576 (80.5 KB) TX bytes:80576 (80.5 KB) -- X11 forwarding via SSH does not work after upgrade to karmic https://bugs.launchpad.net/bugs/434799 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs