We are attempting to configure a RUT955 as a VPN Server using Mobile Data via Vodaphone New Zealand. We were able to successfully and easily setup a similar system in Europe on a RUT950.
The RUT955 has a good, public-IP based connection via the Mobile WAN. We were able to configure Dynamic DNS and get a valid public IP address via a hostname at hopto.org
However, I cannot seem to ping that address, nor can I get any connection via even relatively simple L2TP or PPTP VPN connections. I have reset to factory defaults and tried a couple times, assuming there would be very little that needs configured to get to this level (as was the experience with the 950 here). Is there something simple that I am forgetting to enable that will allow us to ping the 955 via its public IP address?