Public bug reported: On a Ubuntu 22.04 system with /etc/network/interfaces configuration (ifupdown) instead of Netplan, DNS is not set correctly. Therefore, DNS resolution does not work.
This explains the issue: https://unix.stackexchange.com/questions/714901/dns-broken-when-using- ifupdown-and-systemd-resolved-after-upgrade-to-ubuntu-22-0 Solution: Fix in /etc/network/if-up.d/resolved: Old: "$DNS"="$NEW_DNS" New: $DNS="$NEW_DNS" Old: "$DOMAINS"="$NEW_DOMAINS" New: $DOMAINS="$NEW_DOMAINS" /etc/network/if-up.d/resolved writes files /run/network/ifupdown-<PROTOCOL>-<INTERFACE> containing the DNS configuration. The fix ensures that the files /run/network/ifupdown-<PROTOCOL>-<INTERFACE> contain the correct syntax without quotes for the variable name. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: ifupdown 0.8.36+nmu1ubuntu3 ProcVersionSignature: Ubuntu 5.19.0-41.42~22.04.1-generic 5.19.17 Uname: Linux 5.19.0-41-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.4 Architecture: amd64 CasperMD5CheckResult: pass Date: Wed Apr 26 15:04:14 2023 InstallationDate: Installed on 2022-12-08 (139 days ago) InstallationMedia: Ubuntu-Server 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809) ProcEnviron: LANGUAGE=nb:de:en_US TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: ifupdown UpgradeStatus: No upgrade log present (probably fresh install) mtime.conffile..etc.network.if-up.d.resolved: 2023-04-26T14:36:08.277304 ** Affects: ifupdown (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug jammy uec-images -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ifupdown in Ubuntu. https://bugs.launchpad.net/bugs/2017792 Title: ifupdown on Ubuntu 22.04 fails to set DNS correctly -> DNS resolution does not work Status in ifupdown package in Ubuntu: New Bug description: On a Ubuntu 22.04 system with /etc/network/interfaces configuration (ifupdown) instead of Netplan, DNS is not set correctly. Therefore, DNS resolution does not work. This explains the issue: https://unix.stackexchange.com/questions/714901/dns-broken-when-using- ifupdown-and-systemd-resolved-after-upgrade-to-ubuntu-22-0 Solution: Fix in /etc/network/if-up.d/resolved: Old: "$DNS"="$NEW_DNS" New: $DNS="$NEW_DNS" Old: "$DOMAINS"="$NEW_DOMAINS" New: $DOMAINS="$NEW_DOMAINS" /etc/network/if-up.d/resolved writes files /run/network/ifupdown-<PROTOCOL>-<INTERFACE> containing the DNS configuration. The fix ensures that the files /run/network/ifupdown-<PROTOCOL>-<INTERFACE> contain the correct syntax without quotes for the variable name. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: ifupdown 0.8.36+nmu1ubuntu3 ProcVersionSignature: Ubuntu 5.19.0-41.42~22.04.1-generic 5.19.17 Uname: Linux 5.19.0-41-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.4 Architecture: amd64 CasperMD5CheckResult: pass Date: Wed Apr 26 15:04:14 2023 InstallationDate: Installed on 2022-12-08 (139 days ago) InstallationMedia: Ubuntu-Server 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809) ProcEnviron: LANGUAGE=nb:de:en_US TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: ifupdown UpgradeStatus: No upgrade log present (probably fresh install) mtime.conffile..etc.network.if-up.d.resolved: 2023-04-26T14:36:08.277304 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/2017792/+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
