difference in responses between UDP and TCP
arun at arunns.com
Sun Jun 18 10:11:34 UTC 2017
Thanks for the response.
> Perhaps the zone got updated between your queries.
> Have you (as one should in a proper experiment) repeated these queries
> to demonstrate that this is happening consistently?
Yes, it is a consistent behaviour. It happens with some of our secondaries.
dig +tcp @220.127.116.11 pub.sa
dig +notcp @18.104.22.168 pub.sa
> If it is happening consistently, then it's possible that you have *two*
> DNS servers listening on the server, one on the UDP socket, and another
> on the TCP socket, and they're loaded with different zones.
To my understanding, they are running bind with one configuration. Will
double check anyway.
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