The problem stopped happening, so I contacted the network manager and he told me that they changed many equipment that was damaged after a lightning in a thunderstorm night, he also told me that it probably was some rule in the firewall of the old router.
Thanks for all the help, and I'm sorry that I can't reproduce it again and nothing can be done here. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1349000 Title: Networking - Destination unreachable (Fragmentation needed) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1349000/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
