[continued from previous message]   
      
   > Instead of two distinguishable houses with three PCs each.   
   > The ISP has their own router box, doing the translation to make   
   > this possible. This is transparent to the usage at our end.   
   >   
   > |        | WAN   
   > | Router |----- 21.73.14.115 ------   
   > |        |      rogers.ca   
   >                              CGNAT (can be confusing for some Internet   
   features)   
   > |        | WAN   
   > | Router |----- 21.73.14.115 ------   
   > |        |      rogers.ca   
   >   
   > That's intended to conserve addresses, but it may impact things   
   > such as geolocation or figuring out whether the Denver Home Depot   
   > should appear on my web page as the closed Home Depot to me.   
   > Maybe I'm actually in Seattle, and the Home Depot is going to be   
   > confused about me manually setting Seattle Home Depot in the web   
   > page, when the packets (via their WAN IP) appear related to some   
   > Denver ISP.   
   >   
   > That does not come up too often, but occasionally when someone   
   > describes a "brokenness", it is traceable to CGNAT usage. Some   
   > traffic gets blocked, because "a lot of traffic is coming from   
   > 21.73.14.115 right now and we think you are attacking us".   
   >   
   > My ISP (a reseller), has three million IPV4 addresses in a WAN pool, and   
   > I can be assigned any one of those three million addresses via   
   > Dynamic Host Control Protocol (DHCP) or similar, at the ISP building.   
   > Maybe I turn off the router, reboot it, and a new WAN IP is   
   > assigned to me. By using Firefox to    whatismyip.com , I can see   
   > what my new WAN IP is. I don't do this too often, because I don't   
   > need to know that value, in order to use the Internet.   
   >   
   >    Paul   
   My summary note to myself:  Don't ask simple questions about a   
   complicated issue.  Only complicated answers will follow.   
      
   As I've only interacted with the internet via programs  (windows) or   
   apps (android) for many decades, everything that goes on in the   
   background to make the entire enterprise work is a complete black box.   
   I still shudder when I think back to the 1980s, when the Navy put a dumb   
   terminal with a green (monochrome) monitor on my desk that only   
   displayed text and single cheat-sheet of paper with some UNIX commands   
   printed on it I was told that it was the state of the art at that time   
   and that I must use it to do my assigned duties.  That was the last time   
   I needed to interface with a computer using OS command language and   
   learn the prevailing lingo and acronyms.  My French grades in high   
   school and college clearly show my lack of aptitude for foreign languages.   
      
   I appreciate the attempt to educate me and answer my naive questions.   
   Thanks!   
      
   Maybe one day I'll learn to stay in my lane!   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)