After upgrading all of our Linux hosts to Fedora 39, we are running ISC bind 9.18.21 … and it seems the ISC folks are finally done with Microsoft’s “kinda sorta RFC compliance”. Instead of just working around Windows DNS servers having some quirks … they now fail to AXFR the domain.

Fortunately, you can tell bind to stop doing edns ‘stuff‘ by adding a server{} section to named.conf — this gives the server some instructions on how to communicate with the listed server. When bind is no longer trying to do edns “stuff”, Windows doesn’t have an opportunity to provide a bad response, so the AXFR doesn’t fail.