NAME

dns64 - enables DNS64 IPv6 transition mechanism.

DESCRIPTION

The dns64 plugin will when asked for a domain's AAAA records, but only finds A records, synthesizes the AAAA records from the A records.

The synthesis is only performed if the query came in via IPv6.

This translation is for IPv6-only networks that have NAT64 ⟨https://en.wikipedia.org/wiki/NAT64⟩.

dns64 [PREFIX]

•

PREFIX defines a custom prefix instead of the default 64:ff9b::/96.

Or use this slightly longer form with more options:

dns64 [PREFIX] {
    [translate_all]
    prefix PREFIX
}

prefix specifies any local IPv6 prefix to use, instead of the well known prefix (64:ff9b::/96)
translate_all translates all queries, including responses that have AAAA results.

Translate with the default well known prefix. Applies to all queries (if they came in over IPv6).

. {
    dns64
}

Use a custom prefix.

. {
    dns64 64:1337::/96
}

Or

. {
    dns64 {
        prefix 64:1337::/96
    }
}

Enable translation even if an existing AAAA record is present.

. {
    dns64 {
        translate_all
    }
}

If monitoring is enabled (via the prometheus plugin) then the following metrics are exported:

•

coredns_dns64_requests_translated_total{server} - counter of DNS requests translated

The server label is explained in the prometheus plugin documentation.

Not all features required by DNS64 are implemented, only basic AAAA synthesis.

Support "mapping of separate IPv4 ranges to separate IPv6 prefixes"
Resolve PTR records
Make resolver DNSSEC aware. See: RFC 6147 Section 3 ⟨https://tools.ietf.org/html/rfc6147#section-3⟩