** Description changed:
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.
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))
** Description changed:
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.
+ 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))
+ 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))
--
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:
New
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))
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
