The HG612 syncís several Mbps lower than more modern modems and modem/touters. So you have already defeated your object.
To get stats and maintain internet access, you may need the HG612 LAN1 connected to your Draytek WAN2 and the 612 LAN2 connected to a Draytek Ethernet port.
Someone somewhere I think did publish a way to do what you are trying to do, but the way it was done by the person who produced the unlocked firmware did it the way I describe.
Yes, both the original two-cable method and the single cable methods are linked to in this kitz article
. So you can check against the multiple links for the way you are connecting it.
Although yours is obviously already unlocked, you need to check it has version 30SP08 firmware, not the 28SP10. If yours has 30SP08 you can ignore the unlocking part. If not, you need to update it as described.
My broadband basic info/help site - www.robertos.me.uk.
Domains, site and mail hosting - Tsohost
Connection - AAISP Home::1 80/20. 200GB. Sync 68543/12313Kbps @ 600m. BQMs - IPv4
Edited by RobertoS (Sat 21-Jul-18 09:37:00)