I would like to set up an AAAA record for our WAN interface, so that it is reachable from the outside. But I notice that the IPv6 address is not static.
Our ISP (Deutsche Telekom) has given us a static IPv4 address and a static IPv6 prefix, but says that the changing address has to do with the configuration on our equipment.
What could be causing the address to change?
How can I make it permanent?
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