This is more of a note for me but may be useful for some. How to connect to the DrayTek status page from your internal network. First bring up the USG UI and enter in a new static route: 
Then login to your USG via SSH and run: configure set interfaces ethernet eth3 address 192.168.2.100/24 commit This sets an IP address for the port that the modem is connected to. Then from the USG, login to the draytek - telnet 192.168.2.1 and run: ip route add 192.168.0.0 255.255.255.0 192.168.2.2 3 static You then should be able to browse to https://192.168.2.1/ and login to your DrayTek 130 Modem: 