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plugin/log: update nodata/NXDOMAIN story a bit (#2416)

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* plugin/log: update nodata/NXDOMAIN story a bit

Add more words on nodata and NXDOMAIN which is a confusing DNS
"feature"

Fixes: #2412

Signed-off-by: Miek Gieben <miek@miek.nl>

* typos

Signed-off-by: Miek Gieben <miek@miek.nl>
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Miek Gieben 2019-01-05 16:33:27 +00:00 • committed by GitHub
parent c56603ea79
commit 35b74eb197
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1 changed files with 6 additions and 4 deletions
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10
plugin/log/README.md
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@ -44,7 +44,8 @@ log [NAME] [FORMAT] {
The classes of responses have the following meaning:
* `success`: successful response
* `denial`: either NXDOMAIN or NODATA (name exists, type does not)
* `denial`: either NXDOMAIN or nodata responses (Name exists, type does not). A nodata response
sets the return code to NOERROR.
* `error`: SERVFAIL, NOTIMP, REFUSED, etc. Anything that indicates the remote server is not willing to
resolve the request.
* `all`: the default - nothing is specified. Using of this class means that all messages will be
@ -76,10 +77,11 @@ The following place holders are supported:
* `{>do}`: is the EDNS0 DO (DNSSEC OK) bit set in the query
* `{>id}`: query ID
* `{>opcode}`: query OPCODE
* `{/[LABEL]}`: any metadata label is accepted as a place holder if it is enclosed between `{/` and `}`.
the place holder will be replaced by the corresponding metadata value or the default value `-` if label is not defined.
* `{common}`: the default Common Log Format.
* `{combined}`: the Common Log Format with the query opcode.
* `{/LABEL}`: any metadata label is accepted as a place holder if it is enclosed between `{/` and
`}`, the place holder will be replaced by the corresponding metadata value or the default value
`-` if label is not defined. See the *metadata* plugin for more information.
The default Common Log Format is:
@ -112,7 +114,7 @@ Custom log format, for all zones (`.`)
}
~~~
Only log denials for example.org (and below to a file)
Only log denials (NXDOMAIN and nodata) for example.org (and below)
~~~ corefile
. {