Can you provide the kernel output right after trying to access the machine? Eg, on the system with ufw, do:
$ grep -i ufw /var/log/kern.log or if you have redirected ufw output to go to another log file, attach that logfile (eg, /var/log/ufw.log). ** Changed in: ufw (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1443203 Title: GUFW blocks all incoming VNC connections even if rules allow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ufw/+bug/1443203/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs