Most likely, it has to do with recursion settings, yes, but indirectly. When
recursion is not honored for a client, the next thing that named does is check
whether the answer, or anything relevant to the answer, is in cache. But access
to the cache, these days, defaults to being as restrictive as allow-recursion,
so that permissions check fails too, and the end result is a "query (cached)
denied" message in the logs.
The defaults are rather convoluted, but, according to the ARM:
allow-recursion. Specifies which hosts are allowed to make recursive
queries through this server. If allow-recursion is not set then
allow-query-cache is used if set, otherwise allow-query is used if set,
otherwise the default (localnets; localhost;) is used.
allow-query-cache. Specifies which hosts are allowed to get answers
from the cache. If allow-query-cache is not set then allow-recursion is used if
set, otherwise allow-query is used if set unless recursion no; is set in which
case none; is used, otherwise the default (localnets; localhost;) is used.
- Kevin
-----Original Message-----
From: bind-users [mailto:[email protected]] On Behalf Of Andreas
Meyer
Sent: Thursday, August 04, 2016 1:04 PM
To: [email protected]
Subject: a question about denied queries
Hello!
When I see this in the log, does this mean it is because the server does not
allow recursion?
Aug 4 18:52:19 bitmachine1 named[26142]: client 127.0.0.1#52733
(c303.cloudmark.com): query (cache) 'c303.cloudmark.com/A/IN' denied Aug 4
18:56:08 bitmachine1 named[26142]: client 127.0.0.1#32773
(113.36.207.103.in-addr.arpa): query (cache)
'113.36.207.103.in-addr.arpa/PTR/IN' denied Aug 4 18:57:29 bitmachine1
named[26142]: client 127.0.0.1#41550 (229.109.212.81.in-addr.arpa): query
(cache) '229.109.212.81.in-addr.arpa/PTR/IN' denied Aug 4 18:57:29 bitmachine1
named[26142]: client 127.0.0.1#45968
(81.212.109.229.static.turktelekom.com.tr): query (cache)
'81.212.109.229.static.turktelekom.com.tr/A/IN' denied Aug 4 18:57:30
bitmachine1 named[26142]: client 127.0.0.1#46290 (229.109.212.81.in-addr.arpa):
query (cache) '229.109.212.81.in-addr.arpa/PTR/IN' denied Aug 4 18:57:30
bitmachine1 named[26142]: client 127.0.0.1#34166
(81.212.109.229.static.turktelekom.com.tr): query (cache)
'81.212.109.229.static.turktelekom.com.tr/A/IN' denied
Sorry, but it is a long time gone I have dealt with named.
Andreas
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