My ISP recently changed the IP-addressing/network architecture to use CG-NAT resulting in all my web sites and services to not work anymore from the outside world for a few days.

The problem has now been rectified, and everything is again in working order until we finally get IPv6 (which can't arrive too soon!).

Information on CG-NAT can be found eg here;

CG-NAT is basically a NAT-network outside of the customer's own NAT, where CG-NAT's external IP is shared with several customers in this particular neighbourhood. This last part may cause all kinds of networking problems. See list on eg

Below are some pics describing the architecture.


Pic below from the blog at;

Pic below from A10 Networks;









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