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DNS outage - i/o timeout
This morning at approximately 10:15 UTC, my internal NextDNS resolvers started getting repeated i/o timeout messages when resolving on my internal network. For example:
Jun 01 08:14:14 resolver nextdns[434]: Query INTERNALIP UDP A pool.ntp.org. none (qry=30/res=30) 5001ms UDP: dns resolve: read: read udp INTERNALIP:60270->45.90.28.0:53: i/o timeout
Jun 01 08:14:14 resolver nextdns[434]: Query INTERNALIP UDP A 2.amazon.pool.ntp.org. none (qry=39/res=39) 5001ms UDP: dns resolve: read: read udp INTERNALIP:45917->45.90.28.0:53: i/o timeout
Jun 01 08:14:14 resolver nextdns[434]: Query INTERNALIP UDP A www.apple.com. none (qry=31/res=31) 5003ms UDP: dns resolve: read: read udp INTERNALIP:43859->45.90.28.0:53: i/o timeout
Jun 01 08:14:14 resolver nextdns[434]: Query INTERNALIP UDP AAAA skydrive.wns.windows.com. none (qry=42/res=42) 5018ms UDP: dns resolve: read: read udp INTERNALIP:50499->45.90.28.0:53: i/o timeout
Jun 01 08:14:14 resolver nextdns[434]: Query INTERNALIP UDP A www.apple.com. none (qry=31/res=31) 5015ms UDP: dns resolve: read: read udp INTERNALIP:52355->45.90.28.0:53: i/o timeout
Jun 01 08:14:14 resolver nextdns[434]: Query INTERNALIP UDP A www.apple.com. none (qry=31/res=31) 5021ms UDP: dns resolve: read: read udp INTERNALIP:36905->45.90.28.0:53: i/o timeout
Jun 01 08:14:14 resolver nextdns[434]: Query INTERNALIP UDP 65 ocsp2.apple.com. none (qry=33/res=33) 5002ms UDP: dns resolve: read: read udp INTERNALIP:33239->45.90.28.0:53: i/o timeout
Attempting a direct, manual resolution against the DNS resolvers also responds with a timeout:
C:\Users\user>nslookup google.com 45.90.28.215
DNS request timed out.
timeout was 2 seconds.
Server: UnKnown
Address: 45.90.28.215
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
*** Request to UnKnown timed-out
C:\Users\user>nslookup google.com 45.90.30.215
DNS request timed out.
timeout was 2 seconds.
Server: UnKnown
Address: 45.90.30.215
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
*** Request to UnKnown timed-out
3 replies
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@nextdns
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Additionally, the setup page for my profiles shows an issue with checking whether I'm using the config:
Content aside
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