I do see this behavior on Lunar as well: root@lunar:~# resolvectl query oops. oops.: resolve call failed: No appropriate name servers or networks for name found root@lunar:~# dig oops.
; <<>> DiG 9.18.12-1ubuntu1-Ubuntu <<>> oops. ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 21966 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 65494 ;; QUESTION SECTION: ;oops. IN A ;; Query time: 0 msec ;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP) ;; WHEN: Tue Jun 20 20:53:32 UTC 2023 ;; MSG SIZE rcvd: 33 root@lunar:~# resolvectl --version systemd 252 (252.5-2ubuntu3) +PAM +AUDIT +SELINUX +APPARMOR +IMA +SMACK +SECCOMP +GCRYPT -GNUTLS +OPENSSL +ACL +BLKID +CURL +ELFUTILS +FIDO2 +IDN2 -IDN +IPTC +KMOD +LIBCRYPTSETUP +LIBFDISK +PCRE2 -PWQUALITY +P11KIT +QRENCODE +TPM2 +BZIP2 +LZ4 +XZ +ZLIB +ZSTD -BPF_FRAMEWORK -XKBCOMMON +UTMP +SYSVINIT default-hierarchy=unified I took a look at the code but I am not sure the best way to address this. Can you please open an upstream bug (https://github.com/systemd/systemd/issues) and share the link here? Be sure to mention that this can be reproduced on v252. ** Changed in: systemd (Ubuntu) Status: New => Confirmed ** Changed in: systemd (Ubuntu) Importance: Undecided => Low -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/2024320 Title: systemd-resolved: returns SERVFAIL for uknown domain Status in systemd package in Ubuntu: Confirmed Bug description: Ubuntu 22.04.2 amd64 systemd: 249.11-0ubuntu3.9 when I ask for non-existing domain, systemd-resolved replies with SERVFAIL. I believe that correct answer should be NXDOMAIN (this is reply from public DNS servers, like 1.1.1.1, 8.8.8.8, 9.9.9.9 and others). DEMO, I use `khost` utility from package `knot-host`: CloudFlare DNS, reference, I believe this is expected answer: $ khost oops. 1.1.1.1 Host oops. type A error: NXDOMAIN Host oops. type AAAA error: NXDOMAIN Host oops. type MX error: NXDOMAIN systemd-resolved, the bug (and the reply is not consistent, MX record has different error): $ khost oops. Host oops. type A error: SERVFAIL Host oops. type AAAA error: SERVFAIL Host oops. type MX error: NXDOMAIN $ khost -v oops. ;; ->>HEADER<<- opcode: QUERY; status: SERVFAIL; id: 15468 ;; Flags: qr aa rd ra; QUERY: 1; ANSWER: 0; AUTHORITY: 0; ADDITIONAL: 0 ;;oops. IN A ;; Received 22 B ;; Time 2023-06-18 18:27:02 UTC ;; From 127.0.0.53@53(UDP) in 0.0 ms ;; ->>HEADER<<- opcode: QUERY; status: SERVFAIL; id: 55107 ;; Flags: qr aa rd ra; QUERY: 1; ANSWER: 0; AUTHORITY: 0; ADDITIONAL: 0 ;;oops. IN AAAA ;; Received 22 B ;; Time 2023-06-18 18:27:02 UTC ;; From 127.0.0.53@53(UDP) in 0.0 ms ;; ->>HEADER<<- opcode: QUERY; status: NXDOMAIN; id: 46585 ;; Flags: qr rd ra; QUERY: 1; ANSWER: 0; AUTHORITY: 1; ADDITIONAL: 0 ;;oops. IN MX . 1390 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2023061800 1800 900 604800 86400 ;; Received 97 B ;; Time 2023-06-18 18:27:02 UTC ;; From 127.0.0.53@53(UDP) in 3.4 ms Check that DNS is served by systemd-resolved: $ sudo ss -nlp | grep ":53 " udp UNCONN 0 0 127.0.0.53%lo:53 0.0.0.0:* users:(("systemd-resolve",pid=586,fd=13)) tcp LISTEN 0 4096 127.0.0.53%lo:53 0.0.0.0:* users:(("systemd-resolve",pid=586,fd=14)) Check version $ resolvectl --version systemd 249 (249.11-0ubuntu3.9) +PAM +AUDIT +SELINUX +APPARMOR +IMA +SMACK +SECCOMP +GCRYPT +GNUTLS +OPENSSL +ACL +BLKID +CURL +ELFUTILS +FIDO2 +IDN2 -IDN +IPTC +KMOD +LIBCRYPTSETUP +LIBFDISK +PCRE2 -PWQUALITY -P11KIT -QRENCODE +BZIP2 +LZ4 +XZ +ZLIB +ZSTD -XKBCOMMON +UTMP +SYSVINIT default-hierarchy=unified To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/2024320/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
