While filtering on
Domain Name System (DNS) queries in the
Wireshark
packet capture tool with a
filter
of udp.port==53 on a
MacBook Pro
laptop running
OS X El
Capitan (10.11.6), I saw a lot of "Stanard query response refused"
replies in the "Info" field for responses from the DNS server. When
I expanded the "flags" section of the DNS response for those replies
from the DNS server, I saw "Reply code: Refused (5)" for some IP
address lookups, though other DNS queries were being answered with
an IP address.
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