On my Debian 12 system, the connman service was helping itself to interfaces, including my bridge interfaces that I wanted left alone. Maybe try disabling or removing it?
sudo systemctl stop connman sudo systemctl disable connman Best > On Mar 26, 2024, at 10:33, Steffen Dettmer <steffen.dett...@gmail.com> wrote: > > Hi, > > I changed a gateway on a remote site using /etc/network/interfaces by > changing gateway. However, at reboot some old gateway IP reappears. I > really hate when some magic knows better than an explicitly set value. > What happens here? How can I get rid of this? It is 100% reproducible. > > I have no clue where the wrong 2.43 comes from. > > Any hints appreciated! > > Steffen > > > root@site4-nas:~# ls -l /etc/network/interfaces > -rw-r--r-- 1 root root 117 Mar 26 18:19 /etc/network/interfaces > root@site4-nas:~# grep gateway /etc/network/interfaces > gateway 192.168.2.43 > root@site4-nas:~# perl -npi -e 's/gateway 192.168.2.43/gateway > 192.168.2.1/' /etc/network/interface > s > root@site4-nas:~# grep gateway /etc/network/interfaces > gateway 192.168.2.1 > root@site4-nas:~# ls -l /etc/network/interfaces > -rw-r--r-- 1 root root 116 Mar 26 18:21 /etc/network/interfaces > root@site4-nas:~# sync > root@site4-nas:~# date; sleep 1m; date > Tue Mar 26 06:21:47 PM CET 2024 > Tue Mar 26 06:22:47 PM CET 2024 > root@site4-nas:~# ls -l /etc/network/interfaces > -rw-r--r-- 1 root root 116 Mar 26 18:21 /etc/network/interfaces > > OK, so gateway is correct in 18:21 timestamped user config file. Lets reboot. > > root@site4-nas:~# reboot > root@site4-nas:~# Connection to site4-nas closed by remote host. > Connection to site4-nas closed. > root@site4-pve:~# ssh site4-nas > Linux site4-nas 6.5.11-8-pve #1 SMP PREEMPT_DYNAMIC PMX 6.5.11-8 > (2024-01-30T12:27Z) x86_64... > Last login: Tue Mar 26 18:20:50 2024 from 192.168.2.28 > root@site4-nas:~# ls -l /etc/network/interfaces > -rw-r--r-- 1 root root 117 Mar 26 18:23 /etc/network/interfaces > root@site4-nas:~# grep gateway /etc/network/interfaces > gateway 192.168.2.43 > > root@site4-nas:~# find /etc /lib/systemd/ /var/lib/ -type f -print0 | > xargs --null grep 192.168.2.43 > /etc/network/interfaces: gateway 192.168.2.43 > > user config file has updated timestamp and contains bougous gateway. > > Help please! >
