how to find the port number of docker host code example
Example 1: docker port
HOST:CONTAINER
Example 2: docker run all port mapping
docker run --network host
When running using --network host there is no need to map the ports.
All the docker container ports will be available since the network host mode
makes the container use the host's network stack.
Example 3: how to allow only a specific ip on a docker port using ip tables
iptables -I DOCKER -i eth0 -s 8.8.8.8 -p tcp --dport 3306 -j ACCEPT
iptables -I DOCKER -i eth0 -s 4.4.4.4 -p tcp --dport 3306 -j ACCEPT
iptables -I DOCKER 3 -i eth0 -p tcp --dport 3306 -j DROP