New Docker options in CSF - how to allow docker ports?

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Brook
Junior Member
Posts: 12
Joined: 27 Jun 2009, 01:34

New Docker options in CSF - how to allow docker ports?

Post by Brook »

I've just noticed the new Docker options in CSF under "Docker Settings", if we enable these do we no longer need to add the following to /etc/csf/csfpre.sh?

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#!/bin/bash
iptables -t nat -N DOCKER
iptables -t nat -A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
iptables -t nat -A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
iptables -t nat -A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE

iptables -t filter -N DOCKER
iptables -t filter -A FORWARD -o docker0 -j DOCKER
iptables -t filter -A FORWARD -o docker0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -t filter -A FORWARD -i docker0 ! -o docker0 -j ACCEPT
iptables -t filter -A FORWARD -i docker0 -o docker0 -j ACCEPT
Also how can we enable local port access to a Docker container? Is there a way to allow all Docker ports access locally? Here's an example:

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-A DOCKER -d 127.17.0.1/32 ! -i docker0 -p tcp -m tcp --dport 7000 -j DNAT --to-destination 172.17.0.12:8000
Where 7000 is the host port and 8000 is the exposed docker container port. If I turn off CSF I can access the port locally on the same server, turning it back on and the port is blocked. Is there a way to get around this?
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