Re: How to Forward a port (DNAT) ?

["Frédéric Gonzatti" <fred99@libertysurf.fr>]

Antony Stone wrote:

>On Saturday 10 July 2004 10:39 pm, Frédéric Gonzatti wrote:
>
>  
>
>>My iptables rules are :
>>##########################################"
>>iptables -F
>>iptables -X
>>
>>echo 1 > /proc/sys/net/ipv4/ip_forward
>>
>>iptables -P INPUT DROP
>>iptables -P FORWARD DROP
>>iptables -P OUTPUT DROP
>>
>>iptables -t filter -A INPUT -i lo -j ACCEPT
>>iptables -t filter -A OUTPUT -o lo -j ACCEPT
>>
>>iptables -t nat -A PREROUTING -p tcp --dport 25 -i eth2 -j DNAT --to
>>192.168.2.151:25
>>
>>#################################################"
>>
>>It's a very simple test. But unfortunately it doesn't work.
>>    
>>
>
>You need a FORWARD rule to allow the packets through the firewall after being 
>DNATted - you also need to allow the reply packets.
>
>iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
>iptables -A FORWARD -p tcp --dport 25 -d 192.168.2.251 -j ACCEPT
>
>I recommend Oskar Andreasson's tutorial http://iptables-tutorial.frozentux.net 
>to you.
>
>Regards,
>
>Antony.
>
>  
>
Thanks Antony, I will try this.

Frederic