I guess most people have faced this. I got years ago too but after a few seconds some internal monitoring system alerted me that new ports have been exposed.

I guess most people have faced this. I got years ago too but after a few seconds some internal monitoring system alerted me that new ports have been exposed. I am not sure anymore how i solved it but after some time (and none of the documented solutions working) i decided to let docker do to iptables whatever it wants to and used another firewall which filtered the traffic again after iptables was done "filtering" it.