How To Get Nebula VPN To Work With Nokia Gateway

Has anyone been able to get Nebula VPN to work with Nokia gateway? Everything is fine until I fire up Nebula. Then for the work sites I need, I'm blocked … an immediate "not found". Not like it times out. It's immediate. All other sites are fine except those that require a VPN. I've seen that some past firmware updates have addressed some Cisco VPN issues but no mention of Nebula. It uses port 4242, and I keep wondering if that's somehow an issue. Weird thing is: if I turn of WiFi and use my phone as a hotspot, I'm golden. But with the Nokia gateway, nada. Anyone? Any help? Beuler? 

Thanks in advance.