ip address redirect with iptables

i'm using a linux box as a router. I have a cisco 2500 forwarding
a /28 to my linux router. i want one of those address to be
redirected to a different internal IP. Like so:
216.199.233.17 ---> linux box ----> 172.31.7.5

essentially i want the linux box to 'switch' the ip. Can this be done?

On Thu, 08 Sep 2005 10:02:49 -0700, adam wrote:

> i'm using a linux box as a router. I have a cisco 2500 forwarding
> a /28 to my linux router. i want one of those address to be
> redirected to a different internal IP. Like so:
> 216.199.233.17 ---> linux box ----> 172.31.7.5
>
> essentially i want the linux box to 'switch' the ip. Can this be done?


This rule will allow me to ping 216.199.233.17 from the linux box,
but not the outside world, i need to translate the internal address
back to the external address if i want to reach it from the outside
world, which i don't know how to do, here's the rule that kind of
makes it work:
iptables -t nat -A OUTPUT -p all -d 216.199.233.17 -j DNAT
--to-destination 172.31.7.5

adam <(E-Mail Removed)> wrote in news(E-Mail Removed):

> i'm using a linux box as a router. I have a cisco 2500 forwarding
> a /28 to my linux router. i want one of those address to be
> redirected to a different internal IP. Like so:
> 216.199.233.17 ---> linux box ----> 172.31.7.5
>
> essentially i want the linux box to 'switch' the ip. Can this be done?

Yes. Read up the doc at:

http://www.netfilter.org/documentati...NAT-HOWTO.html

Klazmon.