We are experiencing issues with the 1.1.1.1 resolver.
We do send a lot of requests. > 180mio a day (24hrs).
We ran a packet capture:
16:14:06.909326 IP (tos 0x0, ttl 128, id 25580, offset 0, flags [none], proto: UDP (17), length: 68) x.x.x.x.55488 > 1.1.1.1.domain: [udp sum ok] 55400+ [1au] A? domainname.nl. ar: . OPT UDPsize=4000 (40)
16:14:08.896795 IP (tos 0x0, ttl 128, id 27591, offset 0, flags [none], proto: UDP (17), length: 68) x.x.x.x.55167 > 1.0.0.1.domain: [udp sum ok] 8746+ [1au] AAAA? domainname.nl. ar: . OPT UDPsize=4000 (40)
16:14:08.905439 IP (tos 0x0, ttl 58, id 38584, offset 0, flags [DF], proto: UDP (17), length: 553) 1.0.0.1.domain > x.x.x.x.55167: 8746$ q: AAAA? domainname.nl. 0/4/1 ns: domainname.nl. SOA[|domain]
16:14:11.129775 IP (tos 0x0, ttl 128, id 25705, offset 0, flags [none], proto: UDP (17), length: 68) x.x.x.x.55488 > 1.1.1.1.domain: [udp sum ok] 55400+ [1au] A? domainname.nl. ar: . OPT UDPsize=4000 (40)
(I changed the zonename to domainname.nl to show it concerned the .nl tld. And I replaced the requesting ip with x.x.x.x)
So it seems that IPV6 requests are still answered…
I searched the community and found:
" [irtefa]
We do not rate limit. You should be able to send 10QPS pretty easily.".
So we do not experience any rate limiting…
Any ideas what’s going on?