Docker UFW Fix

Solves the problem with open ports for Docker and UFW As Docker uses the NAT table, the filter table FORWARD chain is used and does not touch ufw-input chains as expected. Even for ufw-forward chains it would not work, as DOCKER chains are inserted in front.

This is a simple fix that worked for me. moby/moby#4737 (comment)

Unfortunately this fix stops forwarding users origin IP to host mode configured service We hotfix that with cronjob for now: Add CRONFIX=1 Check yourself if you need that. It only allows 1:1 port mappings

Usage:

Apply the Patch:

docker_ufw_setup=https://gist.githubusercontent.com/rubot/418ecbcef49425339528233b24654a7d/raw/docker_ufw_setup.sh
DEBUG=1 CRONFIX=1 bash <(curl -SsL $docker_ufw_setup)

Reset the patch:

RESET=1 bash <(curl -SsL $docker_ufw_setup)