---
labels:
- 'Stage-Alpha'
- 'Type-S2SAuth'
summary: S2S authentication using DANE
...

Introduction
------------

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

Dependencies
------------

This module requires a DNSSEC aware DNS resolver. Prosodys internal
DNSmodule does not support DNSSEC. Therefore, to use this module,
areplacement is needed, such as [this
one](https://www.zash.se/luaunbound.html).

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

Configuration
-------------

After [installing the
module](https://prosody.im/doc/installing_modules), 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
namedxmpp.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

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

Further reading
---------------

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

Compatibility
-------------

Requires 0.9 or above.