Docker : run ufw, iptables command in docker container

I tried to use ufw and iptables in docker container.

However, I got this errors

iptables v1.6.1: can't initialize iptables table `filter': Permission denied (you must be root)
Perhaps iptables or your kernel needs to be upgraded.

I figured out that I can access with --privileged command with docker exec.

docker exec -it --privileged my_container_id bash

root@my_container_id:/$ sudo ufw status
Status: inactive

Also, I can use --cap-add=NET_ADMIN when run container.

You can see more detail about capability here(docker docs)

docker run --cap-add=NET_ADMIN ...