I get my internet connection from PYUR and have a Fritz! Box 7490. I have a Raspberry PI and an unused laptop in my home network which I use as a server. I usually have a few web servers running on the Raspberry PI and a private Minecraft server running on my laptop.
Up until a few months ago everything worked fine, but then suddenly port forwarding stopped working. I can access all of my services with the local IP, but I can no longer access the external IP. The ports in the firewall are enabled on both devices. In the Fritz! Box I also set up port forwarding. Even if I mark the devices as exposed hosts, it does not work.
At the Fritz! Box can't really be. I'm up to date with the latest version of Fritz! OS and I doubt that such a bug has existed for several months. Resetting to the factory settings did not help either. So I come to one conclusion: It's up to PYUR.
Could it be that they have their own firewall or something? The whole thing worked perfectly until a few months ago, but then suddenly it stopped working.
According to my information, Pyur works with DS Lite or CG NAT. Then the release can't work (and shouldn't have worked a few months ago either). Maybe you used to have a DS connection, for whatever reason, which has now been converted to DS Lite.
DS Lite should be recognizable on the overview page. A secure feature is an IPv4 address in the range 100.64.0.0 to 100.127.255.255.
The accessibility via IPv6 is always given - via the IPv6 address of the server, not the router.
