@ user_none and Starson17 and theducks. Thank you for the compact education and suggestions. Starson you are correct that address 193.268.1.2:8080 that provides local network access to my Calibre server.
So over the past couple of days I have been experimenting with settings on my router to see if I could get external access. I found two settings that I thought might be what was need.
See attachment rouuter1.jpg. I could not get image insertion to work.
I tried this with both entries in this table (as shown) as well as with only one or the other. No success.
See attachment router 2.jpg
Again I tried this with both entries in this table (as shown) as well as with only one or the other. No success.
So unless one of you or someone else has any further ideas I may just go with the idea suggested by slm.
Karma to you all for attempting to help.