aha: ddstreet@lp1886128:~$ sudo iptables -n -t security -L OUTPUT Chain OUTPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- 0.0.0.0/0 168.63.129.16 owner UID match 0 DROP tcp -- 0.0.0.0/0 168.63.129.16 ctstate INVALID,NEW
it seems like this is being added by walinuxagent: Jul 13 16:21:15 lp1886128 python3[1298]: 2020/07/13 16:21:15.672132 INFO ExtHandler Successfully added Azure fabric firewall rules Jul 13 16:21:15 lp1886128 python3[1298]: 2020/07/13 16:21:15.683188 INFO ExtHandler Firewall rules: Jul 13 16:21:15 lp1886128 python3[1298]: Chain INPUT (policy ACCEPT 0 packets, 0 bytes) Jul 13 16:21:15 lp1886128 python3[1298]: pkts bytes target prot opt in out source destination Jul 13 16:21:15 lp1886128 python3[1298]: Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) Jul 13 16:21:15 lp1886128 python3[1298]: pkts bytes target prot opt in out source destination Jul 13 16:21:15 lp1886128 python3[1298]: Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes) Jul 13 16:21:15 lp1886128 python3[1298]: pkts bytes target prot opt in out source destination Jul 13 16:21:15 lp1886128 python3[1298]: 0 0 ACCEPT tcp -- * * 0.0.0.0/0 168.63.129.16 owner UID match 0 Jul 13 16:21:15 lp1886128 python3[1298]: 0 0 DROP tcp -- * * 0.0.0.0/0 168.63.129.16 ctstate INVALID,NEW ** Also affects: walinuxagent (Ubuntu) Importance: Undecided Status: New ** Summary changed: - systemd-resolved does not resolve address due to udp payload size. + walinuxagent blocks DNS fallback to TCP ** Changed in: systemd (Ubuntu) Status: In Progress => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1886128 Title: walinuxagent blocks DNS fallback to TCP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1886128/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs