This was on a thread from November and December - I thought I'd post a
new thread because of the lag in time.

Belkin tech support took quite a while to do it but they eventually sent
me a replacement router, and that did fix the problem. Interesting that
updating the firmware on the original router did not solve the problem
but replacing the entire unit did.

The original problem - one could use the wireless "pre-N" model of
router for everything except getting work done via a C2S VPN - the VPN
would connect just fine but you couldn't ping anything on the other
side. Replacing the router solved the problem.