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What I would like to learn, even though, is whether we could block all ports instead of just some. Wouldn't it operate as anticipated without the --ctorigdstport? Then I can open up a number of ports (putting a couple of rules right before this just one) if needed after which have every thing 슬롯 else blocked.
Ultimately, you'll have to thoroughly clean up iptables restart the docker support very first, should you messed it excessive looking to lock down the port as I did.