Samuel Díaz García wrote:

> Without having a look into your scripts, I think you need:
> 1) Allow INPUT into filter table to the port.
> 2) Allow FORDWARD into filter table to the redirected conection.
> Good luck.
>
Line 56: $IPTABLES -A INPUT -i $INET_IFACE -p tcp --dport 800 -j ACCEPT
Line 57: $IPTABLES -A INPUT -i $INET_IFACE -p udp --dport 800 -j ACCEPT
Line 58:
Line 59: # Forward Chain
Line 60: $IPTABLES -A FORWARD -i $LAN_IFACE -j ACCEPT
Line 61: $IPTABLES -A FORWARD -o $LAN_IFACE -j ACCEPT

Line 85: $IPTABLES -A PREROUTING -t nat -p tcp -d $INET_IP --dport 800 
-j DNAT --to 192.168.1.5:800
Line 86: $IPTABLES -A PREROUTING -t nat -p udp -d $INET_IP --dport 800 
-j DNAT --to 192.168.1.5:800

This is a few lines from the attached firewall.
I think you may be reffering to these lines of the firewall script.

On Lines 56,57 I allow connections to my gateway on port 800
On Lines 60,61 I allow all connections in the forwarding chain.
And on Lines 85,86 is the port forwarding rules.

Kind Regards Julian.