Appending rules instead of replacing

[alecxvs]

Is it possible to append rules to iptables instead of clearing out all existing rules? I have a setup with Docker which adds its own rules to iptables, but I can only run this to add my own rules after Docker is already running. I can restart Docker to restore its rules when my rules are modified, but that is a little too disruptive.

[rtkrruvinskiy]

This isn't something we currently support, and unfortunately we don't have plans to implement something like this. However, we'd be open to a PR that implements such an optional mode. One thing to think carefully about in such a mode is how to handle rule deletion.