[CentOS] OT - IP Tables - forwarding to localhost - WORKS!!

[first last]

--- Luciano Rocha <strange at nsk.no-ip.org> wrote:

> On Mon, Jun 18, 2007 at 11:46:42AM +0100, 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
> 
> Try this:
> iptables -t nat -I PREROUTING -p tcp -d old_mail_server_ip --dport 25
> \
>   -j REDIRECT
> iptables -t nat -I OUTPUT -p tcp -d old_mail_server_ip --dport 25 \
>   -j REDIRECT

Thanks, this worked! This just saved me a reboot on the production
servers :)

Thanks to all who responded.

Gabriel 


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