Package: systemd-resolved Version: 252.22-1~deb12u1 Severity: important Tags: upstream X-Debbugs-Cc: fe...@jacobi-bs.de
Since Debian Bookworm, systemd-resolved cannot be installed along with resolvconf anymore and provides its own stub implementation of this command. However, when using it in conjunction with ifupdown, this overrides either IPv4 or IPv6 nameservers. Considers the following /etc/network/interfaces: auto lo iface lo inet loopback iface lo inet6 loopback auto ens3 iface ens3 inet static address 192.0.0.2/24 gateway 192.0.0.1 dns-nameservers 192.0.0.1 iface ens3 inet6 static address 2001:db8::2/64 netmask 64 gateway fe80::1 dns-nameservers 2001:db8::1 In background, this executes `resolvconf -a IFACE.PROTOCOL` and supplies the nameservers to resolvconf, e.g. echo 'nameserver 192.0.0.1' | resolvconf -a ens3.inet However, the systemd-resolved resolvconf implementation removes the protocol indentifier: echo "nameserver 192.0.0.1" | resolvconf -a ens3.inet Dropped protocol specifier '.inet' from 'ens3.inet'. Using 'ens3' (ifindex=2). This leads to the fact, that only ens3 is used internally. For the configuration above, this means the previous configured IPv4 nameserver is completely overriddden with the latter one in the IPv6 stanza. This also causes several other problems for tools relying on resolvconf not dropping the protocol identifier and I would consider this a breaking change compared to the original resolvconf implementation. -- System Information: Debian Release: 12.5 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 6.1.0-13-amd64 (SMP w/2 CPU threads; PREEMPT) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) Versions of packages systemd-resolved depends on: ii dbus [default-dbus-system-bus] 1.14.10-1~deb12u1 ii libc6 2.36-9+deb12u4 ii libssl3 3.0.11-1~deb12u2 ii libsystemd-shared 252.22-1~deb12u1 ii systemd 252.22-1~deb12u1 Versions of packages systemd-resolved recommends: ii libnss-myhostname 252.22-1~deb12u1 pn libnss-resolve <none> Versions of packages systemd-resolved suggests: ii polkitd 122-3 -- no debconf information --- Kind regards Felix Jacobi
