WR31 - SSH over PPP not working

I cannot access my WR31 using SSH over PPP…

Device has a proper public IP address and can access the internet.
SSH server is enabled
User is is set to have SSH access over PPP
Firewall is currently disabled

Same results with 2 separate WR31 units.

What am I missing?

What is the IP address? Do you have ssh server enabled on the Transport router?
Please post whole ‘debug.txt’ file