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Re: NAT and IPTABLES problem



On Tue, Apr 01, 2008 at 07:33:30AM -0700, chindea mihai wrote:
> 
> 
> ----- Original Message ----
> From: Bonnel Christophe <mage.tophinus@free.fr>
> To: chindea mihai <misubs24@yahoo.com>
> Cc: debian-amd64@lists.debian.org
> Sent: Tuesday, April 1, 2008 4:22:38 AM
> Subject: Re: NAT and IPTABLES problem
> 
>  Hi,
> 
> I think there is two problems here :
> >
> > #Forward LAN traffic from LAN $INTIF to Internet $EXTIF
> > $IPTABLES -A FORWARD -i $INTIF -o $EXTIF -m state --state 
> > NEW,ESTABLISHED -j ACCEPT
> You allow only NEW and ESTABLISHED output to the web. Don't you forget 
> RELATED ?
> 
> You must also let your gateway forward input datas from the web :
> $IPTABLES -A FORWARD -i $EXTIF -o $INTIF -m state --state ESTABLISHED, 
> RELATED -j ACCEPT
> 
> You should also redifined the default policy :
> $IPTABLES -P INPUT -j DROP
> $IPTABLES -P OUTPUT -j DROP
> $IPTABLES -P FORWARD -j DROP
> $IPTABLES -t NAT -P PREROUTING ACCEPT
> $IPTABLES -t NAT -P POSTROUTING ACCEPT
> $IPTABLES -t NAT -P OUTPUT ACCEPT
> 
> Now, this line  :
> >
> >     $IPTABLES -t nat -A POSTROUTING -s 192.168.5.0/24 -o eth1 -j SNAT 
> > --to xx.xx.xx.xxx, and it's still not working.
> >
> You should use it if you want DMZ for example, so you don't need it here.
> 
> Hope this helps
> 
> Christophe
> 
> I made those changes, but unfortunately I still get "Request times out", at ping attempts, from subnet pc.
> You know it's weird, cause I have VMware installed, and apparently NAT connection works just fine for it, well vmware doesn't use iptables.
vmware has its own network module to do that
> 
> Mihai,
> 
> 
> 
> 
> 
> 
>       ____________________________________________________________________________________
> You rock. That's why Blockbuster's offering you one month of Blockbuster Total Access, No Cost.  
> http://tc.deals.yahoo.com/tc/blockbuster/text5.com
-- 
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		-- Dorothy L. Sayers, "Gaudy Night"

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