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route based on incoming interface

I have two modem connections to two isp's
I also have two ip's on one interface - eth0 and eth0:1 connected to a local network

What i need to figure out is how to establish routing so that traffic coming into eth0 goes out ppp0 and traffic coming into eth0:1 goes out ppp1 (as well as their returned packets)

Pablo Allietti

Yes. Set the default gateway for the router to point up PPP0
link, and use iptables SNAT to set all packets to have source address ppp1

Pablo Allietti

you have a solution for brabard i recommend to read it

https://www.experts-exchange.com/questions/21064680/how-to-configure-sattelite-for-download-and-dsl-for-upload-on-redhat-9.html

xscousr

ASKER

squid won't solve the issue.

Not only do i have http traffic coming in i also have two sendmail servers running, each masqing and using it's isp's mailserver as a smart host, one on each eth. With this each incoming needs to go out vi it's assigned ppp connection so that it will be coming from within the isp's block and be accepted by their mail server.

so
25
------->| eth0 | --------->ppp0 ---------> Internet
| 80 |
| |
| 26 |
------->| eth0:1 | --------->ppp1 ---------> Internet
8080

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de2Zotjes

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xscousr

ASKER

thanks de2Zotjes