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author Kim Alvefur <zash@zash.se>
date Tue, 18 Nov 2014 14:03:41 +0100
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1 #summary S2S authentication using DANE
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2 #labels Stage-Alpha,Type-S2SAuth
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4 = Introduction =
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6 This module implements DANE as described in
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7 [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].
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9 = Dependencies =
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11 This module requires a DNSSEC aware DNS resolver. Prosodys internal DNS
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12 module does not support DNSSEC. Therefore, to use this module, a
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13 replacement is needed, such as [https://www.zash.se/luaunbound.html this one].
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15 More installation instructions can be found at [https://www.zash.se/prosody-dane.html Prosody with DANE].
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17 = Configuration =
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18
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19 After [https://prosody.im/doc/installing_modules installing the module], just add it to `modules_enabled`;
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21 {{{
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22 modules_enabled = {
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23 ...
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24 "s2s_auth_dane";
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25 }
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26 }}}
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28 = DNS Setup =
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30 In order for other services to verify your site using using this plugin,
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31 you need to publish TLSA records (and they need to have this plugin).
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32 Here's an example using "DANE-EE Cert SHA2-256" for a host named
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33 xmpp.example.com serving the domain example.com.
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35 {{{
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36 $ORIGIN example.com.
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37 ; Your standard SRV record
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38 _xmpp-server._tcp.example.com IN SRV 0 0 5269 xmpp.example.com.
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39 ; IPv4 and IPv6 addresses
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40 xmpp.example.com. IN A 192.0.2.68
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41 xmpp.example.com. IN AAAA 2001:0db8:0000:0000:4441:4e45:544c:5341
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43 ; The DANE TLSA records. These three are equivalent, you would use only one of them.
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44 ; First, using symbolic names:
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45 _5269._tcp.xmpp.example.com. 300 IN TLSA DANE-EE Cert SHA2-256 E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855
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46 ; Using numbers:
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47 _5269._tcp.xmpp.example.com. 300 IN TLSA 3 0 1 E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855
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48 ; Raw binary format, should work even with very old DNS tools:
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49 _5269._tcp.xmpp.example.com. 300 IN TYPE52 \# 35 030001E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855
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50 }}}
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52 [http://www.internetsociety.org/deploy360/dnssec/tools/ List of DNSSEC and DANE tools]
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54 = Further reading =
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56 * [http://tools.ietf.org/html/draft-ietf-dane-ops DANE TLSA implementation and operational guidance]
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58 = Compatibility =
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60 Requires 0.9 or above.