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65 lines
1.3 KiB
Markdown
65 lines
1.3 KiB
Markdown
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# dns64
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## Name
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*dns64* - enables DNS64 IPv6 transition mechanism.
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## Description
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From Wikipedia:
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> DNS64 describes a DNS server that when asked for a domain's AAAA records, but only finds
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> A records, synthesizes the AAAA records from the A records.
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The synthesis in only performed if the query came in via IPv6.
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See [RFC 6147](https://tools.ietf.org/html/rfc6147) for more information.
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## Syntax
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~~~
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dns64 [PREFIX] {
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[translate\_all]
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}
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~~~
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* [PREFIX] defines a custom prefix instead of the default `64:ff9b::/96`
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* `translate_all` translates all queries, including respones that have AAAA results.
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## Examples
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Translate with the default well known prefix. Applies to all queries
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~~~
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dns64
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~~~
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Use a custom prefix
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~~~
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dns64 64:1337::/96
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# Or
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dns64 {
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prefix 64:1337::/96
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}
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~~~
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Enable translation even if an existing AAAA record is present
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~~~
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dns64 {
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translate_all
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}
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~~~
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* `prefix` specifies any local IPv6 prefix to use, instead of the well known prefix (64:ff9b::/96)
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## Bugs
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Not all features required by DNS64 are implemented, only basic AAAA synthesis.
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* Support "mapping of separate IPv4 ranges to separate IPv6 prefixes"
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* Resolve PTR records
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* Follow CNAME records
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* Make resolver DNSSEC aware. See: [RFC 6147 Section 3](https://tools.ietf.org/html/rfc6147#section-3)
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