coredns/plugin/dns64

dns64

Name

dns64 - enables DNS64 IPv6 transition mechanism.

Description

From Wikipedia:

DNS64 describes a DNS server that when asked for a domain's AAAA records, but only finds A records, synthesizes the AAAA records from the A records.

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

This translation is for IPv6-only networks that have NAT64.

See RFC 6147 for more information.

Syntax

dns64 [PREFIX] {
  [translate_all]
}

• [PREFIX] defines a custom prefix instead of the default 64:ff9b::/96.
• translate_all translates all queries, including respones that have AAAA results.

Examples

Translate with the default well known prefix. Applies to all queries.

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
}

• prefix specifies any local IPv6 prefix to use, instead of the well known prefix (64:ff9b::/96)

Bugs

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
• Follow CNAME records
• Make resolver DNSSEC aware. See: RFC 6147 Section 3