Azure DNS does support DNS over TCP. Looking through a separate packet capture I had taken during investigating this issue, I don't see any attempts by resolved to open a TCP connection to port 53 of the DNS server (in fact, I don't see any use of TCP port 53 at all).
Wireshark filters used: udp.port == 53 or tcp.port == 53 (shows all DNS traffic) tcp.port == 53 (shows nothing) -- 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: systemd-resolved does not resolve address due to udp payload size. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1886128/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
