[CentOS] OT - IP Tables - forwarding to localhost

Mon Jun 18 10:54:23 UTC 2007
Igor Demjanenko <idemjanenko at fotki.com>

Hi,

Try this:

iptables -t nat -A PREROUTING -p tcp -d old_mailserver_ip 
--destination-port 25 -j DNAT --to-destination 127.0.0.1:25

first last wrote:
> Hi,
>
> I am trying to set up a firewall rule so calls to old_mailserver:25 get
> redirected to localhost:25. I have seen quite a few rules and none seem
> to work.
>
> I have tried with the firewall enabled (configured to allow smtp) and
> disabled, but it doesn't seem to make a difference.
>
> One of the commands I have been using is:
> /sbin/iptables -t nat -I PREROUTING -p tcp -d old_mailserver_ip/32
> --dport 25 -j REDIRECT --to 127.0.0.1:25
>
> Am I missing anything?
>
> Thanks
>
> Gabriel
>
>
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