I want to run a hidden service in Whonix and to isolate the webserver and php I want to configure them inside docker containers. I installed Docker and configured nginx, php and both containers are up and running. I also can access the nginx server through the hidden service generated in the gateway (I followed the official whonix guide to configure it) but the nginx can’t access the php container, I tested the communication between them using ping but there isn’t any communication between those containers. The same docker file is working in Debian 9 without problems so I guess that maybe I need to add something in the firewall to allow the private internal address of containers. I though that this will can be a good idea to improve whonix security or anonimity because even if there is any leak, it will be a docker private ip and having the code isolated in containers I think that’s better. I am not an expert in Docker but I am very noob using firewall and iptables so I need some help to get that configuration working.