Use 3rd router(tplink,netware,whatever),setup LAN ip address to 192.168.138.1,netmask 255.255.255.0.save.
In HDCP menu, setup ip range 192.168.138.50 to 192.168.138.200,netmask 255.255.255.0,gateway 192.168.138.1,save.
Reboot router ,connect your machine.