[tproxy] transparent smtp

Balazs Scheidler bazsi at balabit.hu
Thu Apr 15 10:32:47 CEST 2010

On Mon, 2010-03-29 at 15:25 +0100, Paulo Roncon wrote:
> Hello, 
> can I use the TPROXY to use as a transparent smtp proxy?
> I want to use as:
> serv1 --------------->(serX)--------->serv2
> where:
> -servX receives the smtp traffic from serv1 and relay it to serv2
> -serv2 receives the header information (includind IP information) as
> being sent from serv1
> -servX is not known to serv1 nor serv2
> As of now I tried to follow the posts of the TPROXY home no no avail.
> Tried the PROXSMTP and managed to be transparent at the SMTP level,
> but the servX IP was visible...

yes, tproxy is protocol agnostic, so it doesn't care whether you are
using SMTP or HTTP.


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