@David-TP - Sorry for the bogus post. I have a long standing understanding with my ISP that they will always assign me a routable IP address. Unbeknownst to me and simultaneously with my purchase of...

I previously had an old AirPort Extreme. I had it set up to forward ports to two machines: an iMac and a Pi4. This worked brilliantly and enabled me to ssh to either machine from anywhere. It also...