Hi, On Wed, Sep 07, 2022 at 08:33:33AM +0200, Bo Berglund wrote: > I have a script that runs on all of my RPi units on startup and it reports the > internal and external IP address to my server and it sends me an email, so I > know all that. > > However, most ISP's nowadays provide a NAT-ed external IP address to the > clients > connecting to their service, and those are inaccessible from an outside source > to initiate a conversation. > I guess it enhances the security of run-of-the-mill customers, but it blocks > having a server on the connection.
The driver is less "security" and "block servers on the connection" but plain cost. IPv4 addresses are traded on the market at a price of about 45-50 US$ per IPv4 address (= a /24 is worth 11.000 US$...) See https://auctions.ipv4.global/ ... and this is getting worse, when ISPs realize that they can sell off their IPv4 address space and move customers behind an even more oversubscribed NAT44 box... because, hey, "if they can surf to facebook, the Internet is OK, no?" (and plain outgoing https copes quite well with NAT challenges) gert -- "If was one thing all people took for granted, was conviction that if you feed honest figures into a computer, honest figures come out. Never doubted it myself till I met a computer with a sense of humor." Robert A. Heinlein, The Moon is a Harsh Mistress Gert Doering - Munich, Germany g...@greenie.muc.de
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