Package: ifupdown Version: 0.8.41 Severity: normal Dear Maintainer,
I was doing my network setup, which included statically configured logical interfaces. So there were dns-nameservers entries in my /etc/network/interfaces. My configuration files is below (the actual IPs and MACs is wiped). I noted that ifup with my setup is producing error messages like this: ... guessnet: Started tests guessnet: 3 candidates guessnet: Got ARP reply from 192.168.0.1 XX:XX:XX:XX:XX:XX guessnet: ARP reply from 192.168.0.1 XX:XX:XX:XX:XX:XX matches guessnet: Notified success of scan peer 192.168.0.1 XX:XX:XX:XX:XX:XX guessnet: Removing candidate enp4s0-direct guessnet: Keeping candidate enp4s0-router guessnet: We had changes, notifying the listener guessnet: Got ARP reply from 192.168.0.1 XX:XX:XX:XX:XX:XX /etc/network/if-up.d/resolved: 69: DNS: not found /etc/network/if-up.d/resolved: 1: /run/network/ifupdown-inet-enp4s0: DNS=192.168.0.1 192.168.0.12: not found Failed to parse DNS server address: DNS Failed to set DNS configuration: Invalid argument I have found discussion about similar problem there: https://unix.stackexchange.com/questions/714901/dns-broken-when-using-ifupdown-and-systemd-resolved-after-upgrade-to-ubuntu-22-0 Also I had a look into the /etc/network/if-up.d/resolved and I assume this is a typo in the line 69: https://salsa.debian.org/debian/ifupdown/-/blob/master/debian/if-up.d/resolved#L69 Then I edited mine /etc/network/if-up.d/resolved this way: --- a/network/if-up.d/resolved +++ b/network/if-up.d/resolved @@ -43,11 +43,11 @@ if systemctl is-enabled systemd-resolved > /dev/null 2>&1; then fi if [ -n "$NEW_DNS" ]; then cat <<EOF >"$mystatedir/ifupdown-${ADDRFAM}-$interface" -"$DNS"="$NEW_DNS" +$DNS="$NEW_DNS" EOF if [ -n "$NEW_DOMAINS" ]; then cat <<EOF >>"$mystatedir/ifupdown-${ADDRFAM}-$interface" -"$DOMAINS"="$NEW_DOMAINS" +$DOMAINS="$NEW_DOMAINS" EOF fi fi @@ -66,7 +66,7 @@ EOF # ignore errors due to nonexistent file md5sum "$mystatedir/isc-dhcp-v4-$interface" "$mystatedir/isc-dhcp-v6-$interface" "$mystatedir/ifupdown-inet-$interface" "$mystatedir/ifupdown-inet6-$interface" > "$newstate" 2> /dev/null || true if ! cmp --silent "$oldstate" "$newstate" 2>/dev/null; then - DNS DNS6 DOMAINS DOMAINS6 DEFAULT_ROUTE + # DNS DNS6 DOMAINS DOMAINS6 DEFAULT_ROUTE # v4 first if [ -e "$mystatedir/isc-dhcp-v4-$interface" ]; then . "$mystatedir/isc-dhcp-v4-$interface" And now it works well. I'm guessing that someone might also have a static network configuration at the same time as systemd-resolved installed, so I hope this information can help someone. Kind regards, Dmytro -- Package-specific info: --- /etc/network/interfaces: # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). source /etc/network/interfaces.d/* # The loopback network interface auto lo iface lo inet loopback # The primary network interface # allow-hotplug enp4s0 # iface enp4s0 inet dhcp # This is an autoconfigured IPv6 interface # iface enp4s0 inet6 auto allow-hotplug wlp0s20f3 iface wlp0s20f3 inet manual wpa-driver wext wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf iface default inet dhcp allow-hotplug enp4s0 mapping enp4s0 script /usr/sbin/guessnet-ifupdown map autofilter: true map verbose: true map debug: true map default: enp4s0-guest # sorry, I do not wish to publish the actual addresses there iface enp4s0-router inet static address 192.168.0.44 netmask 255.255.255.0 gateway 192.168.0.1 test peer address 192.168.0.1 mac XX:XX:XX:XX:XX:XX source dns-nameservers 192.168.0.1 dns-nameservers 192.168.0.12 iface enp4s0-direct inet static address XX.XX.XXX.XX netmask 255.255.255.0 gateway XX.XX.XXX.X test peer address XX.XX.XXX.X mac XX:XX:XX:XX:XX:XX source dns-nameservers XX.XX.XXX.XXX dns-nameservers XX.XXX.XXX.XXX iface enp4s0-guest inet dhcp --- /etc/network/interfaces.d/*: cat: '/etc/network/interfaces.d/*': No such file or directory --- up and down scripts installed: /etc/network/if-down.d: total 8 -rwxr-xr-x 1 root root 372 Apr 21 2020 openvpn -rwxr-xr-x 1 root root 759 Sep 27 16:09 resolved lrwxrwxrwx 1 root root 32 Jan 31 13:58 wpasupplicant -> ../../wpa_supplicant/ifupdown.sh /etc/network/if-post-down.d: total 4 -rwxr-xr-x 1 root root 1409 Jun 5 2018 wireless-tools lrwxrwxrwx 1 root root 32 Jan 31 13:58 wpasupplicant -> ../../wpa_supplicant/ifupdown.sh /etc/network/if-pre-up.d: total 8 -rwxr-xr-x 1 root root 4191 Sep 15 2018 wireless-tools lrwxrwxrwx 1 root root 32 Jan 31 13:58 wpasupplicant -> ../../wpa_supplicant/ifupdown.sh /etc/network/if-up.d: total 12 -rwxr-xr-x 1 root root 385 Apr 21 2020 openvpn -rwxr-xr-x 1 root root 4661 Feb 13 19:47 resolved lrwxrwxrwx 1 root root 32 Jan 31 13:58 wpasupplicant -> ../../wpa_supplicant/ifupdown.sh -- System Information: Debian Release: bookworm/sid APT prefers testing APT policy: (800, 'testing'), (700, 'stable'), (600, 'unstable'), (500, 'stable-security'), (50, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 6.1.0-3-amd64 (SMP w/8 CPU threads; PREEMPT) Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=uk_UA.UTF-8, LC_CTYPE=uk_UA.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages ifupdown depends on: ii adduser 3.131 ii iproute2 6.1.0-1 ii libc6 2.36-8 Versions of packages ifupdown recommends: ii isc-dhcp-client [dhcp-client] 4.4.3-P1-1.1 Versions of packages ifupdown suggests: ii ppp 2.4.9-1+1.1+b1 pn rdnssd <none> -- Configuration Files: /etc/network/if-up.d/resolved changed: case "$ADDRFAM" in inet|inet6) : ;; *) exit 0 ;; esac if systemctl is-enabled systemd-resolved > /dev/null 2>&1; then interface=$IFACE if [ ! "$interface" ]; then return fi # TODO handle lo interface settings if [ "$interface" = "lo" ]; then return fi ifindex=$(cat "/sys/class/net/$interface/ifindex") if [ ! "$ifindex" ]; then return fi mystatedir=/run/network mkdir -p $mystatedir statedir=/run/systemd/resolve/netif mkdir -p $statedir chown systemd-resolve:systemd-resolve $statedir oldstate="$(mktemp)" # ignore errors due to nonexistent file md5sum "$mystatedir/isc-dhcp-v4-$interface" "$mystatedir/isc-dhcp-v6-$interface" "$mystatedir/ifupdown-inet-$interface" "$mystatedir/ifupdown-inet6-$interface" > "$oldstate" 2> /dev/null || true NEW_DEFAULT_ROUTE=$IF_DNS_DEFAULT_ROUTE NEW_DNS=$(echo $IF_DNS_NAMESERVERS $IF_DNS_NAMESERVER) NEW_DOMAINS=$(echo $IF_DNS_DOMAIN $IF_DNS_SEARCH) DNS=DNS DOMAINS=DOMAINS if [ "$ADDRFAM" = "inet6" ]; then DNS=DNS6 DOMAINS=DOMAINS6 fi if [ -n "$NEW_DNS" ]; then cat <<EOF >"$mystatedir/ifupdown-${ADDRFAM}-$interface" $DNS="$NEW_DNS" EOF if [ -n "$NEW_DOMAINS" ]; then cat <<EOF >>"$mystatedir/ifupdown-${ADDRFAM}-$interface" $DOMAINS="$NEW_DOMAINS" EOF fi fi case "$NEW_DEFAULT_ROUTE" in 1|yes|true|on) NEW_DEFAULT_ROUTE=yes ;; 0|no|false|off) NEW_DEFAULT_ROUTE=no ;; *) NEW_DEFAULT_ROUTE= ;; esac if [ -n "$NEW_DEFAULT_ROUTE" ]; then cat <<EOF >>"$mystatedir/ifupdown-${ADDRFAM}-$interface" DEFAULT_ROUTE="$NEW_DEFAULT_ROUTE" EOF fi newstate="$(mktemp)" # ignore errors due to nonexistent file md5sum "$mystatedir/isc-dhcp-v4-$interface" "$mystatedir/isc-dhcp-v6-$interface" "$mystatedir/ifupdown-inet-$interface" "$mystatedir/ifupdown-inet6-$interface" > "$newstate" 2> /dev/null || true if ! cmp --silent "$oldstate" "$newstate" 2>/dev/null; then # DNS DNS6 DOMAINS DOMAINS6 DEFAULT_ROUTE # v4 first if [ -e "$mystatedir/isc-dhcp-v4-$interface" ]; then . "$mystatedir/isc-dhcp-v4-$interface" fi # v4 manual config overrides if [ -e "$mystatedir/ifupdown-inet-$interface" ]; then . "$mystatedir/ifupdown-inet-$interface" fi # v6 preffered if [ -e "$mystatedir/isc-dhcp-v6-$interface" ]; then . "$mystatedir/isc-dhcp-v6-$interface" fi # v6 manual config overrides if [ -e "$mystatedir/ifupdown-inet6-$interface" ]; then . "$mystatedir/ifupdown-inet6-$interface" fi resolvectl_failed= if [ "$DNS" ] || [ "$DNS6" ] ; then cat <<EOF >"$statedir/$ifindex" LLMNR=yes MDNS=no SERVERS=$(echo $DNS6 $DNS) DOMAINS=$(echo $DOMAINS6 $DOMAINS) EOF if [ -n "$DEFAULT_ROUTE" ]; then cat <<EOF >>"$statedir/$ifindex" DEFAULT_ROUTE=$DEFAULT_ROUTE EOF fi chown systemd-resolve:systemd-resolve "$statedir/$ifindex" # In addition to creating the state file (needed if we run before # resolved is started), also feed the information directly to # resolved. if systemctl --quiet is-active systemd-resolved; then resolvectl llmnr "$ifindex" yes || resolvectl_failed=$? resolvectl mdns "$ifindex" no || resolvectl_failed=$? if [ "$DOMAINS6" ] || [ "$DOMAINS" ]; then resolvectl domain "$ifindex" $DOMAINS6 $DOMAINS || resolvectl_failed=$? else resolvectl domain "$ifindex" "" || resolvectl_failed=$? fi resolvectl dns "$ifindex" $DNS6 $DNS || resolvectl_failed=$? if [ "$DEFAULT_ROUTE" ]; then resolvectl default-route "$ifindex" $DEFAULT_ROUTE || resolvectl_failed=$? fi fi else rm -f "$statedir/$ifindex" if systemctl --quiet is-active systemd-resolved; then resolvectl revert "$ifindex" || resolvectl_failed=$? fi fi # resolved was running, but without dbus, it means state files # will not be read & resolvectl commands failed, restart it if [ "$resolvectl_failed" ]; then systemctl try-restart systemd-resolved fi fi rm -f "$oldstate" "$newstate" fi -- no debconf information
