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:
set interfaces ethernet eth3 address 192.168.2.100/24
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: