Re: Static NAT Mappings

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On Wed, 2004-10-06 at 18:25, John Black wrote:
> I'm trying to setup static NAT mappings.
> 
> this is what i did, but it doesn't work:
> public address 1.2.3.4/24
> ifconfig eth0:0 1.2.3.4 netmask 255.255.255.0

ip address add 1.2.3.4 dev eth0

> then in my firwall script:
> iptables -t nat -A POSTROUTING -s 192.168.0.4 \
>  -o eth0 -j SNAT --to 1.2.3.4

OK--looks good.

> i tried this also:
> iptables -t nat -A POSTROUTING -s 192.168.0.4/24
>   -o eth0 -j SNAT --to 1.2.3.4

that's nonsense.  .4 is not the network address, .0 is.

> i have read the howto on the netfilter web site. 
> but i'm still lost.

do you have filter rules in place that could be blocking the traffic?

have you enabled IP forwarding (sysctl -w net.ipv4.ip_forward=1)?

-j

-- 
Jason Opperisano <opie@xxxxxxxxxxx>



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