[Touch-packages] [Bug 1795913] Re: Systemd Resolver works unreliable to local DNS Names
Closing that bug since the submitter debugged it and found out it was not a systemd issue. Those who have other DNS problems please register a new bug ** Changed in: systemd (Ubuntu) Status: Confirmed => Invalid -- 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/1795913 Title: Systemd Resolver works unreliable to local DNS Names Status in systemd package in Ubuntu: Invalid Bug description: 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. 0IN 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. 0IN 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. 0IN 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= 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:
[Touch-packages] [Bug 1795913] Re: Systemd Resolver works unreliable to local DNS Names
I have a similar issue (dns server running on a DSL router). The router assigns hostnames ending in .home Seems to break resolution for the systemd-resolved as well (only working sometimes). -- 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/1795913 Title: Systemd Resolver works unreliable to local DNS Names Status in systemd package in Ubuntu: Confirmed Bug description: 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. 0IN 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. 0IN 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. 0IN 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= 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:
[Touch-packages] [Bug 1795913] Re: Systemd Resolver works unreliable to local DNS Names
Any news on this? I have many hosts with this error. My server is a plain Bind. -- 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/1795913 Title: Systemd Resolver works unreliable to local DNS Names Status in systemd package in Ubuntu: Confirmed Bug description: 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. 0IN 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. 0IN 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. 0IN 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= 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 To
[Touch-packages] [Bug 1795913] Re: Systemd Resolver works unreliable to local DNS Names
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: systemd (Ubuntu) Status: New => Confirmed -- 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/1795913 Title: Systemd Resolver works unreliable to local DNS Names Status in systemd package in Ubuntu: Confirmed Bug description: 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. 0IN 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. 0IN 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. 0IN 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= 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
[Touch-packages] [Bug 1795913] Re: Systemd Resolver works unreliable to local DNS Names
After some more digging I found this behavior roots from the DNS Resolver running on the Router (a Turris Omnia) Local hosts get a name xxx.home.example.com from fixed DHCP leases and the knot resolver (kresd) on the Turris responds with the local IPv4 Address for this hosts. Queries for IPv6 Addresses of xxx.home.example.com get a NXDOMAIN response from kresd. systemd-resolved queries for A and records, the A request gets used and the subsequent NXDOMAIN responce leads to a cache flush and a negative caching for the name. After tracking down the behavior a workaround in the turris kresd configuration was proposed (https://github.com/CZ-NIC/turris-os- packages/commit/42da887f8165dccc374c73c3ed9e024fba7b0c3e). This fixed my problem. Thanks, this bug can be closed, the source is not in systemd -- 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/1795913 Title: Systemd Resolver works unreliable to local DNS Names Status in systemd package in Ubuntu: New Bug description: 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. 0IN 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. 0IN 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. 0IN 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= 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
