When using a Linux Box configured as ethernet bridge with no IP address (transparent) you can do some things besides layer 2 filtering. You can do packet filtering, classifying, bandwidth control per IP, transparent proxy, firewalling, and so.
For spamassassin I think it would be difficult to use a transparent bridge this way, as e-mails need to know the IP of the destination mail server, and this destination would be where spamassassin works. On a transparent bridge, the machine has no IP. ----- Mensaje original ----- De: "Martin McWhorter" <[EMAIL PROTECTED]> Para: "Stefano Costantini" <[EMAIL PROTECTED]>; "SpamAssassin Users List" <[EMAIL PROTECTED]> Enviado: Jueves, 17 de Junio de 2004 11:20 Asunto: Re: Bridge mode? Stefano Costantini wrote: >"Kang , Joseph S." <[EMAIL PROTECTED]> writes: > > >>Stefano, to run SA, you will need a server running some form of MTA (Mail >>Transport Agent) such as Sendmail, Postfix, Qmail, etc >> >> > >i know, but ... should be interesting to do something like my antivirus layer2 >bridge does: > >check messages >clean viruses >change header >change body >notify users > > No. You are wrong. These things can NOT be done at layer 2. Just to 'check messages' you are using SMTP wich runs on the upper layers. All these things you meantion can not be done at layer 2. Layer 2 protocol are things like: ethernet, PPP, HDLC, STP... SpamAssasin, or any is not aware of any layer 2 protocols. Niether is any antivirus program I know about.
