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68 lines
1.8 KiB
Groff
68 lines
1.8 KiB
Groff
.\" Generated by Mmark Markdown Processer - mmark.miek.nl
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.TH "COREDNS-LOCAL" 7 "March 2021" "CoreDNS" "CoreDNS Plugins"
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.SH "NAME"
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.PP
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\fIlocal\fP - respond to local names.
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.SH "DESCRIPTION"
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.PP
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\fIlocal\fP will respond with a basic reply to a "local request". Local request are defined to be
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names in the following zones: localhost, 0.in-addr.arpa, 127.in-addr.arpa and 255.in-addr.arpa \fIand\fP
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any query asking for \fB\fClocalhost.<domain>\fR. When seeing the latter a metric counter is increased and
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if \fIdebug\fP is enabled a debug log is emitted.
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.PP
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With \fIlocal\fP enabled any query falling under these zones will get a reply. The prevents the query
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from "escaping" to the internet and putting strain on external infrastructure.
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.PP
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The zones are mostly empty, only \fB\fClocalhost.\fR address records (A and AAAA) are defined and a
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\fB\fC1.0.0.127.in-addr.arpa.\fR reverse (PTR) record.
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.SH "SYNTAX"
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.PP
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.RS
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.nf
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local
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.fi
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.RE
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.SH "METRICS"
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.PP
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If monitoring is enabled (via the \fIprometheus\fP plugin) then the following metric is exported:
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.IP \(bu 4
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\fB\fCcoredns_local_localhost_requests_total{}\fR - a counter of the number of \fB\fClocalhost.<domain>\fR
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requests CoreDNS has seen. Note this does \fInot\fP count \fB\fClocalhost.\fR queries.
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.PP
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Note that this metric \fIdoes not\fP have a \fB\fCserver\fR label, because it's more interesting to find the
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client(s) performing these queries than to see which server handled it. You'll need to inspect the
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debug log to get the client IP address.
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.SH "EXAMPLES"
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.PP
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.RS
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.nf
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\&. {
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local
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}
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.fi
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.RE
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.SH "BUGS"
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.PP
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Only the \fB\fCin-addr.arpa.\fR reverse zone is implemented, \fB\fCip6.arpa.\fR queries are not intercepted.
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.SH "SEE ALSO"
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.PP
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BIND9's configuration in Debian comes with these zones preconfigured. See the \fIdebug\fP plugin for
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enabling debug logging.
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