[LARTC] iptables port forward

[LARTC] iptables port forward

[Tomas Bonnedahl]

hello, quick question: i want to port forward those that enter at x:80 to internal address y:7865, how can i do that
with iptables? 

iptables -t nat -I PREROUTING 4 -i eth0 -d x -p tcp --dport 80 -j DNAT --to y   when/how do i specify port 7865?


thank you,
tomas bonnedahl
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Re: [LARTC] iptables port forward

[Martin A. Brown]

Hi there Tomas!

 : iptables -t nat -I PREROUTING 4 -i eth0 -d x -p tcp --dport 80 \
 :   -j DNAT --to y   when/how do i specify port 7865?

This should do the trick:

  iptables -t nat -I PREROUTING 4 -i eth0 -d $PUB_IP -p tcp --dport 80 \
     -j DNAT --to-destination $PRIV_IP:7865

Check out Oskar Andreeason's tutorial on this very matter.

  http://iptables-tutorial.frozentux.net/iptables-tutorial.html#DNATTARGET

Ciao for now,

-Martin

-- 
Martin A. Brown --- SecurePipe, Inc. --- mabrown@securepipe.com

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Re: [LARTC] iptables port forward

[Tomas Bonnedahl]

thank you martin.. i haven't tried it yet but i trust you ;)


best,
tomas

On Wed, May 21, 2003 at 09:51:10AM -0500, Martin A. Brown wrote:
> Hi there Tomas!
> 
>  : iptables -t nat -I PREROUTING 4 -i eth0 -d x -p tcp --dport 80 \
>  :   -j DNAT --to y   when/how do i specify port 7865?
> 
> This should do the trick:
> 
>   iptables -t nat -I PREROUTING 4 -i eth0 -d $PUB_IP -p tcp --dport 80 \
>      -j DNAT --to-destination $PRIV_IP:7865
> 
> Check out Oskar Andreeason's tutorial on this very matter.
> 
>   http://iptables-tutorial.frozentux.net/iptables-tutorial.html#DNATTARGET
> 
> Ciao for now,
> 
> -Martin
> 
> -- 
> Martin A. Brown --- SecurePipe, Inc. --- mabrown@securepipe.com
> 
> _______________________________________________
> LARTC mailing list / LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
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