Using Zotarios' Repository that pulls from bubntux on dockerhub
The container works great if I use "bridge" for my network type. However, if I use "custom: br0" the number of connections shown in my router spikes to 43 and I get the attached error in my logs. In reviewing the problem I found that this issue was raised here ( https://github.com/bubuntux/nordvpn/issues/91 ). The issue is closed but the last comment points to issue 139.
I'm hoping that others have found a solution to getting this image to work on custom as I'd like to assign it an IP and route traffic through it.