3 ms·
I remember when you could list entire cctlds, how did that work then? They weren’t as big as they are today but definitely bigger than 65k.
by tinus_hn 5y ago
I remember when you could list entire cctlds, how did that work then? They weren’t as big as they are today but definitely bigger than 65k.
- matttpt 5y agoIt sounds like you're thinking of zone transfers (the special AXFR query type). In that case the server's response may consist of more than one DNS message sent consecutively over a single TCP connection [1], so it's possible to transfer large zones. E.g. out of curiosity I just asked for the root zone with dig . axfr @iad.xfr.dns.icann.org and I received 24,448 records transferred over 83 DNS messages, according to the stats dig prints at the end. [1] https://datatracker.ietf.org/doc/html/rfc5936#section-2.2 https://datatracker.ietf.org/doc/html/rfc5936#section-2.2