Public bug reported:
systemd-resolved fails to resolve reliably local DNS names under
home.example.com. The first call succeeds but all following calls fails
to resolve the address correctly:
steve@steve-ThinkPad-T560:~$ systemd-resolve --flush-caches
steve@steve-ThinkPad-T560:~$ systemd-resolve akolus.home.example.com
akolus.home.example.com: 192.168.1.5
-- Information acquired via protocol DNS in 2.7ms.
-- Data is authenticated: no
steve@steve-ThinkPad-T560:~$ systemd-resolve akolus.home.example.com
akolus.home.example.com: resolve call failed: 'akolus.home.example.com' not
found
A call to systemd-resolve --flush-caches get the next resolvement
working again.
The syslog show following entries
Oct 3 16:44:41 steve-ThinkPad-T560 systemd-resolved[1092]: Flushed all caches.
Oct 3 16:44:41 steve-ThinkPad-T560 systemd-resolved[1092]: Server returned
error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying
transaction with reduced feature level UDP.
A dig for the adresses to all DHCP provided DNS Server works:
steve@steve-ThinkPad-T560:~$ dig akolus.home.example.com @192.168.1.1
; <<>> DiG 9.11.3-1ubuntu1.2-Ubuntu <<>> akolus.home.example.com @192.168.1.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61886
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;akolus.home.example.com. IN A
;; ANSWER SECTION:
akolus.home.example.com. 0 IN A 192.168.1.5
;; Query time: 0 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Wed Oct 03 16:46:30 CEST 2018
;; MSG SIZE rcvd: 70
steve@steve-ThinkPad-T560:~$ dig akolus.home.example.com
@2a04:4540:4707:a800::1
; <<>> DiG 9.11.3-1ubuntu1.2-Ubuntu <<>> akolus.home.example.com
@2a04:4540:4707:a800::1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24202
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;akolus.home.example.com. IN A
;; ANSWER SECTION:
akolus.home.example.com. 0 IN A 192.168.1.5
;; Query time: 0 msec
;; SERVER: 2a04:4540:4707:a800::1#53(2a04:4540:4707:a800::1)
;; WHEN: Wed Oct 03 16:46:33 CEST 2018
;; MSG SIZE rcvd: 70
steve@steve-ThinkPad-T560:~$ dig akolus.home.example.com
@fd9c:9819:4c58::1
; <<>> DiG 9.11.3-1ubuntu1.2-Ubuntu <<>> akolus.home.example.com
@fd9c:9819:4c58::1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9783
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;akolus.home.example.com. IN A
;; ANSWER SECTION:
akolus.home.example.com. 0 IN A 192.168.1.5
;; Query time: 0 msec
;; SERVER: fd9c:9819:4c58::1#53(fd9c:9819:4c58::1)
;; WHEN: Wed Oct 03 16:46:38 CEST 2018
;; MSG SIZE rcvd: 70
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: systemd 237-3ubuntu10.3
ProcVersionSignature: Ubuntu 4.15.0-34.37-generic 4.15.18
Uname: Linux 4.15.0-34-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.3
Architecture: amd64
CurrentDesktop: X-Cinnamon
Date: Wed Oct 3 15:56:44 2018
InstallationDate: Installed on 2018-03-05 (212 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180305)
MachineType: LENOVO 20FH002RGE
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-34-generic
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/07/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: N1KET26W (1.13 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20FH002RGE
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40705 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrN1KET26W(1.13):bd10/07/2016:svnLENOVO:pn20FH002RGE:pvrThinkPadT560:rvnLENOVO:rn20FH002RGE:rvrSDK0J40705WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T560
dmi.product.name: 20FH002RGE
dmi.product.version: ThinkPad T560
dmi.sys.vendor: LENOVO
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1795913
Title:
Systemd Resolver works unreliable to local DNS Names
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