@BHobbes 

Not sure what is going on. As a test, I would connect the windows 11 computer direct to the modem/gateway bypassing to router. That way you can see if the issues is computer or router related,

  @ArcherC8 Tried that and it didn't like the long verbose IP address.  I just ran CanYouSeeMe against ports 500 and 48500 and they are all blocked.  I even checked for blockage on my cellular connection using my phone and that appears to be blocked as well.  Of course, I have Xfinity for my phone service so???

  @BHobbes 

By tried that, what happened? Did it work with the router removed? If not you need to get that to work before attaching the router.

Did you set up Port forwarding in the router so they would be open?

If you have a Windows 10 machine, it would be interesting to see if the same set up works. 

Having Xfinity as your phone service should not be an issue if using Cellular instead of WIFI for the connection. 

  @ArcherC8 I connected my computer directly to the cable modem.  The address for the VPN is something like john-smith-wired-rknghjhdnj.dynamic-m.com.  This address produced a message to the effect that the address couldn't be found.  I am running Windows 11 but have tried a Windows 10 computer on some of my tests without success.  The VPN was set up a few years back and used to work.  SInce then my internet speed has been increased, the gateway was replaced by a newer model and I replaced my computer.  The VPN still works as another employee is currently using it.