I can't seem to conceptualise a workable solution, probably because I don't know ipchains well enough, but here is the problem. Hopefully someone finds it intriguing/potentially useful.
I have access to two ISPs, call them A and B, A being the primary ISP. Link bonding cannot be used, because according to the HOWTO all the links in the bond must be made to the same destination, typically a portmaster or terminal server. I have a network of machines on a private network (192.168.1.0/24) that use an ipmasq gateway (192.168.1.1:A_address) Basically a normal ipmasq network, taken care of by the ipmasq/ipchains packages. What I would like to do is: 0) Bring up a connection to B, add static routes to the routing table for B, handled transparently by masquerading. Example: set a route to debian.midco.net on B, and traffic from internal machine 192.168.1.42 to debian.midco.net will be routed through B instead of A. And no existing connections through A will be affected by B coming up or going down. 1) full adaptive routing between A and B, such that arbitrary packets in a connection between 192.168.1.42 and debian.midco.net can be transported by either connection depending on connection load or other criteria. I know how to set up either scenario SAVE FOR including IP masquerading. Example: using a proxy on 192.168.1.1 and a static route on B, and directing 192.168.1.42 to the proxy. Unfortunately I don't know enough about ipchains to even begin experimenting for a working solution (also I don't yet have the second modem :) Don't want to purchase it until I have something concrete I can try) -- Beiad Ian Q. Dalton
