iptables

[Gentoo20]

When I run: nmap -sT -O localhost

this is the results:

Port State Service
22/tcp open ssh
25/tcp open smtp
111/tcp open sunrpc
631/tcp open ipp

When I run: iptables -n -L

None of the ports are listed. How are the ports openned?

Where else are open/closed ports controled from?

[GatoVolador]

Hello there,

Recall that iptables can only filter what gets to the ports in question, it doesn't actually open or close any ports. Generally, the services themselves open the ports that they need. For example, you see port 22 open because you're probably running the ssh daemon. Port 631 open indicates you're probably using cups. I forget the services that use smtp and sunrpc. If you really want to close these ports (which is a good idea if you don't use the services in question,) find the service to which they correspond and disable it, usually with something like

[Gentoo20]

OK. Thanks.

I need to get port 80 to forward to another server. This is what I have but is not working: