[TriLUG] Re: sendmail and alternate ports

[Chris Knowles]

iptables <MATCH> -j DNAT --to-destination localhost:port 

should do it...  Haven't done specifically this, but I've used DNAT to
forward to other servers, other ports.

CJK

On Thu, 2002-06-06 at 09:24, Kevin - The Alchemist - Sonney wrote:
> On Thu, 2002-06-06 at 08:53, Thunder Bear wrote:
> > Forgive my ignorance of iptables since I usually use pf for firewalling,
> > but I know with pf you can intercept any outbound connection to a
> > specific port and redirect it to a locally running daemon listening on
> > another port.  This is how many people do squid transparent proxying. 
> > That way anything trying to go out to port 25 of a remote host would be
> > intercepted and redirected to stunnel as described earlier.
> 
> Hmm. I have no idea if we can do that on linux yet. Although if it's a
> full iptables implementation, it should be do-able, I just don't know
> how.
> 
> -- 
> --------------------------------------------
> --      Kevin "The Alchemist" Sonney      --
> --  ICQ: 4855069            AIM: ksonney  --
> --------------------------------------------
> 320C 0336 3BC4 13EC 4AEC  6AF2 525F CED7 7BB6 12C9
> 
>  Obviously I was either onto something, or on something. -- Larry Wall
>  on the creation of Perl