#summary S2S authentication using DANE

#labels Stage-Alpha,Type-S2SAuth

= Introduction =

This module implements DANE as described in

[http://tools.ietf.org/html/draft-miller-xmpp-dnssec-prooftype Using DNS Security Extensions (DNSSEC) and DNS-based Authentication of Named Entities (DANE) as a Prooftype for XMPP Domain Name Associations].

= Dependencies =

This module requires a DNSSEC aware DNS resolver.  Prosodys internal DNS

module does not support DNSSEC.  Therefore, to use this module, a

replacement is needed, such as [https://www.zash.se/luaunbound.html this one].

More installation instructions can be found at [https://www.zash.se/prosody-dane.html Prosody with DANE].

= Configuration =

After [https://prosody.im/doc/installing_modules installing the module], just add it to `modules_enabled`;

{{{

modules_enabled = {

	...

	"s2s_auth_dane";

}

}}}

= DNS Setup =

In order for other services to verify your site using using this plugin,

you need to publish TLSA records (and they need to have this plugin).

Here's an example using "DANE-EE Cert SHA2-256" for a host named

xmpp.example.com serving the domain example.com.

{{{

$ORIGIN example.com.

; Your standard SRV record

_xmpp-server._tcp.example.com IN SRV 0 0 5269 xmpp.example.com.

; IPv4 and IPv6 addresses

xmpp.example.com. IN A 192.0.2.68

xmpp.example.com. IN AAAA 2001:0db8:0000:0000:4441:4e45:544c:5341

; The DANE TLSA records.  These three are equivalent, you would use only one of them.

; First, using symbolic names:

_5269._tcp.xmpp.example.com. 300 IN TLSA DANE-EE Cert SHA2-256 E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855

; Using numbers:

_5269._tcp.xmpp.example.com. 300 IN TLSA 3 0 1 E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855

; Raw binary format, should work even with very old DNS tools:

_5269._tcp.xmpp.example.com. 300 IN TYPE52 \# 35 030001E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855

}}}

[http://www.internetsociety.org/deploy360/dnssec/tools/ List of DNSSEC and DANE tools]

= Further reading =

* [http://tools.ietf.org/html/draft-ietf-dane-ops DANE TLSA implementation and operational guidance]

= Compatibility =

Requires 0.9 or above.