Re: routing_based_on_port/services

El lun, 03-10-2005 a las 09:41 +0000, kucserak@post.sk escribiÃ:
> Dear List!
>
> I just want to ask you a question.I have a linux(Secure platform) gateway 
> server with 2 external ip address to the internet (one S/0 ADSl, second S/1 
> Point to Point) and one internal ip eth0 for my LAN. I need to split up the 
> outgoing traffic.HTTP/HTTPS want to route through the ADSL and the rest of 
> traffic (SMTP,POP3,FTP) through the Point to Point.Can i solve this with 
> Linux iptables or whatever else. Any suggestion help..
>
> regards,
>
> Chris

Hi:

 You can ( must ) use 'ip route','ip rule' and tc set of instructions. 

In a few words.

You create a table where store routes ( /etc/iproute2/rt_tables )

For example 

7 out-http

Then you can create a set of routes to be stored in this table

For example 

ip route add default via adsl table out-http

Then, assign policies ( rules ) to use the defined set of routes
depending on the type of outgoing packet ( proto, source, dest... ).

When a packet matches an assigned rule for table out-http, the routing
processes 'forget' standard routes and applies the set of routes defined
in table out-http.

This is well explained in the excelent howto http://lartc.org/

HTH

Regards

David Ballester