Unable to connect to SonicWall VPN via Xfinity

Hi

Trying to connect my computer to SonicWall VPN. Able to connect when wired to Xfinity Cable Modem/Wireless Router. Unable to connect when when using wifi.

 

I have tried a few items:

1) Turned off Advanced Security

2) Added port forwarding to ports required by VPN provider

 

There was a thread on this forum about a similar issue being resolved by changing the degfault gateway from 10.0.0.1 to 192.xxx.x.x.  Not sure how to accomplish that. 

 

Any help would be appreciated.