Thanks for the response but it didn't work. It just hangs there trying
to connect and then I get an error "no route to host" (as it should if
trying to connect to that host directly.
--- Igor Demjanenko <idemjanenko@xxxxxxxxx> wrote:
> 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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