Interfaces of Docker networks keep switching randomly

[zapp2me]

Hi,

I'm using WatchYouLAN to monitor my local network (192.168.1.0/24) but sometimes I get all my other containers from my traefik docker network (172.18.x.x). I know I can set the interface I want to scan, but apperently eth0 and eth1 switch around every now and then.

I already tried to give them names in my Docker Compose file, since they are supposed to be sorted alphabetically. I also tried to define the traefik network as internal: true since these are supposed to be set up last when the container is built. But nothing has helped so far.

Lastly I tried to use an ARP string (-gNx 192.168.1.0/24 -I eth0, -gNx 192.168.1.0/24 -I eth1) but I still get results from the 172.18.x.x network.

Any ideas on how I can make sure to only scan for devices in my actual LAN?