If we have two network interfaces setup in MWG, is it possible to direct traffic out a specific interface given their source IP address? The reason for this is that we have multiple ISPs and prior to the MWG we were sending traffic from certain networks out one pipe and then everything else out a different pipe. I don't know if anyone has run into this yet or if it's possible in explicit proxy mode. We're running version 126.96.36.199.0 if that matters...upgrade to the latest version is on the to-do list over the next two weeks.
I havent seen this done, this would be considered policy based routing being done ON the MWG.
If you have a device upstream from the MWG that can split things based on source IP, then you could enable IP spoofing on the MWG (that way all the traffic would retain the original source address), BUT you'd have you make sure your network is good to do this in. When IP spoofing is introduced asynchronous routes can cause split path issues (syn goes out one path, syn ack comes back another).