> If you use the > > http://www.openbsd.org/faq/pf/pools.html#outgoing > > method as I use now then even through the outgoing address will be > changed for 50% of the packets those same packets will be routed out > through the default interface only :-( First of all I don't know anything about OpenBSD but we have to know, making squid use a particular tcp_outgoing_address is as much as what we can ask squid to do, actual routing decision should rightfully be left to the OPERATING SYSTEM. In Linux, all these things are addressed :- 1. You can use POLICY ROUTING - one of the capabilities of policy routing is be able to route based on SOURCE IP instead of destination IP. 2. You can use MULTI PATH ROUTING - ie you can start a session based on certain relative weight you assign to a default route. 3. You can also use netfilter 'recent'/CONNMARK match - they allow you to tie a session to an interface for a configurable amount of time. I might not be even exhaustive here. All in all, my conclusion is this :- You really have to look hard to the operating system for this instead of squid. If you have exhausted the capabilities of OpenBSD, you would have to throw it away ! :-)
