Shrew VPN Question

Bingo:  I figured it out:

I found and reviewed a document on connecting Shrew to a Linksys:

https://www.linksys.com/us/support-article?articleNum=143689

Which says "If the VPN client is not behind a NAT, click the Client tab then select disable for the NAT Traversal option."

I set the NAT Traversal = DISABLED and that fixed the issue.

Nothing else in the Linksys setup applies to my Netgear FVS318Gv2.  All other settings used came from 

https://www.hackviking.com/security_and_hacks/ipsec-vpn-with-netgear-fvs318v3/

Thanks to everyone for the tidbits that helped find the solution. 

It's absolutely amazing to me that the Shrew Web Site doesn't offer adequate help or support in configuring their client that they hope to sell licensing for; (The Pro Version).

How can anyone make money selling tools that noone can figure out how to use!   Terrible business model.