[CentOS] A little iptables help

Aleksandar Milivojevic alex at milivojevic.org
Wed Sep 28 16:56:54 UTC 2005

Quoting Rodrigo Barbosa <rodrigob at suespammers.org>:

> Humm, that should be relatively simple:
> iptables -t nat -A PREROUTING -p tcp --destination-port 80 -j ACCEPT

You probably want to use INPUT chain of filter table for this:

iptables -A INPUT -p tcp --destination-port 80 -j ACCEPT

If INPUT chain of filter table has default policy set to DROP, putting 
target into PREROUTING chain of nat table isn't going to let the packet go
through the firewall.

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