97 lines
2.6 KiB
Markdown
97 lines
2.6 KiB
Markdown
# file
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## Name
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*file* - enables serving zone data from an RFC 1035-style master file.
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## Description
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The *file* plugin is used for an "old-style" DNS server. It serves from a preloaded file that exists
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on disk. If the zone file contains signatures (i.e., is signed using DNSSEC), correct DNSSEC answers
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are returned. Only NSEC is supported! If you use this setup *you* are responsible for re-signing the
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zonefile.
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## Syntax
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~~~
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file DBFILE [ZONES...]
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~~~
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* **DBFILE** the database file to read and parse. If the path is relative, the path from the *root*
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plugin will be prepended to it.
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* **ZONES** zones it should be authoritative for. If empty, the zones from the configuration block
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are used.
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If you want to round-robin A and AAAA responses look at the *loadbalance* plugin.
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~~~
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file DBFILE [ZONES... ] {
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transfer to ADDRESS...
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reload DURATION
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}
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~~~
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* `transfer` enables zone transfers. It may be specified multiples times. `To` or `from` signals
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the direction. **ADDRESS** must be denoted in CIDR notation (e.g., 127.0.0.1/32) or just as plain
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addresses. The special wildcard `*` means: the entire internet (only valid for 'transfer to').
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When an address is specified a notify message will be sent whenever the zone is reloaded.
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* `reload` interval to perform a reload of the zone if the SOA version changes. Default is one minute.
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Value of `0` means to not scan for changes and reload. For example, `30s` checks the zonefile every 30 seconds
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and reloads the zone when serial changes.
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## Examples
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Load the `example.org` zone from `example.org.signed` and allow transfers to the internet, but send
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notifies to 10.240.1.1
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~~~ corefile
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example.org {
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file example.org.signed {
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transfer to *
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transfer to 10.240.1.1
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}
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}
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~~~
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Or use a single zone file for multiple zones:
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~~~ corefile
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. {
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file example.org.signed example.org example.net {
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transfer to *
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transfer to 10.240.1.1
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}
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}
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~~~
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Note that if you have a configuration like the following you may run into a problem of the origin
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not being correctly recognized:
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~~~ corefile
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. {
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file db.example.org
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}
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~~~
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We omit the origin for the file `db.example.org`, so this references the zone in the server block,
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which, in this case, is the root zone. Any contents of `db.example.org` will then read with that
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origin set; this may or may not do what you want.
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It's better to be explicit here and specify the correct origin. This can be done in two ways:
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~~~ corefile
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. {
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file db.example.org example.org
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}
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~~~
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Or
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~~~ corefile
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example.org {
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file db.example.org
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}
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~~~
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## Also See
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See the *loadbalance* plugin if you need simple record shuffling.
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