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Manage ports in Docker with CSF?

cn flag

There are several questions about this, I read them all but it did not solve my problem. I wrote this question to answer this issue comprehensively once and for all to solve the problems of people like me.

Suppose we have an Nginx container on Docker that listens to port 80 from outside the server. How can I manage Port 80 with CSF? I want this port to be closed in server and only available for certain IPs that exist on CSf.allow list. if edit /etc/csf/csf.conf and remove 80 from bellow line it can't help.

# Allow incoming TCP ports
TCP_IN = "22,21,25"
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