I tried to ask security or networking professionals but my question was rejected as off-topic twice, so this is my last try.
I have Windows 10 machine with 3 gateways and I'd like to route packets from different apps to different gateways according to table of rules.
For instance - all DNS requests must flow through protected VPN channel while Skype traffic must go to the fastest gateway. I know how to do it in Linux but I suspect that for Windows I need some kind of MITM hacking software which can inspect TCP/IP headers (and even application layer headers) and re-write destination IP address (and possibly some other fields).
Is there any solution? I thought to write my own using scapy but it can only change a shadow copy of the packet but not the original. I can't replace target OS it should be Windows 10.
