On Mon, Jun 14, 2021 at 10:52:43AM +0000, Geoff Snowdon via Outages <outages@outages.org> wrote a message of 200 lines which said:
There's been some chatter on NANOG - they're under DDOS attack apparently.
Indeed, most of the authoritative name servers timeout. % check-soa -i nist.gov bea.nist.gov. 132.163.4.10: ERROR: read udp 193.70.85.11:60102->132.163.4.10:53: i/o timeout 2610:20:6b01:4::10: ERROR: read udp [2001:41d0:302:2200::180]:35149->[2610:20:6b01:4::10]:53: i/o timeout bea2.nist.gov. 132.163.4.11: ERROR: read udp 193.70.85.11:34369->132.163.4.11:53: i/o timeout 2610:20:6b01:4::11: ERROR: read udp [2001:41d0:302:2200::180]:47271->[2610:20:6b01:4::11]:53: i/o timeout gea.nist.gov. 129.6.13.3: ERROR: read udp 193.70.85.11:36517->129.6.13.3:53: i/o timeout 2610:20:6005:13::3: ERROR: read udp [2001:41d0:302:2200::180]:60519->[2610:20:6005:13::3]:53: i/o timeout gea2.nist.gov. 2610:20:6005:13::4: ERROR: read udp [2001:41d0:302:2200::180]:57731->[2610:20:6005:13::4]:53: i/o timeout 129.6.13.4: ERROR: read udp 193.70.85.11:38669->129.6.13.4:53: i/o timeout gea3.nist.gov. 129.6.14.193: OK: 2889174 (84 ms) 2610:20:6005:2192::193: ERROR: read udp [2001:41d0:302:2200::180]:39170->[2610:20:6005:2192::193]:53: i/o timeout The RIPE Atlas probes show some SERVFAILs: % blaeu-resolve -r 100 -c US --type A nist.gov [129.6.13.49] : 62 occurrences [ERROR: SERVFAIL] : 15 occurrences [198.105.244.131 198.105.254.131] : 1 occurrences Test #30851192 done at 2021-06-14T11:22:04Z