If you don't use UPnP you need to have a gateway. I'm not saying you need to set it statically but you need to get one from your DHCP-server.
See example attached with a valid setup. ** Attachment added: "Screenshot-Connection Information.png" http://launchpadlibrarian.net/13780511/Screenshot-Connection%20Information.png -- [Hardy] Internet connection cutting off intermittently https://bugs.launchpad.net/bugs/220072 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