I have one ADSL connection and one 4G backup connection, each with its own modem/router on the same
192.168.0.1 (ADSL) and
The default gateway is
192.168.0.1 (ADSL) so the backup router is never used for outgoing connections.
I have TSE/RDP ports openned on each routers to reach several computers on the local network.
With an old Windows 2003 and an old Windows XP, the incoming connections are ok from whatever router: when I connect through ADSL or 4G I can interact with these old Windows computers.
So these Windows send back packets through the originating router. This is probably not a "good" behaviour, but for my need it is very nice.
With Windows 2012, the packets are sent back only through the default gateway, wich is the logical thing to do.
How to tell Windows 2012 to send packets back to the originating router, à la Windows 2003?
I thought this was called "source routing", but seems this is not the exact expression.