Difference between revisions of "Securing XMPP"

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(Use YAML syntax for the ejabberd configuration file snippet.)
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== Aim: Encrypt All XMPP Connections ==
== Clients ==
 
need to add something...
This page provides instructions for XMPP server administrators to secure XMPP client and server connections ready for the following [https://github.com/stpeter/manifesto/blob/master/manifesto.txt ubiquitous encryption manifesto] test days:
* January 4, 2014 - first test day requiring encryption
* February 22, 2014 - second test day
* March 22, 2014 - third test day
* April 19, 2014 - fourth test day
* May 19, 2014 - '''permanent upgrade''' to encrypted network


To achieve this, we need to:
== Servers ==
* Encrypt connections between clients and servers (C2S)
An XMPP Server is considered secure when the following (minimum) items are present:
* Encrypt server to server connections (S2S)
* The server is running with a server certificate
* The server is configured to not allow any cleartext communications - S2S and C2S
* The server supports XEP-198
* ...


== Step1: Get a server certificate==
=== Step1: Get a server certificate===
Let's say you run an XMPP service for <code>example.net</code> (jids of user@example.net), you will need to order a certificate for with a subject or alt-name of <code>example.net</code> (not <code>server.example.net</code>) from your preferred cert provider ([http://startssl.com/ StartSSL] offers free certificates and is quite good).
Let's say you run an XMPP service for <code>domain.tld</code> (jids of user@domain.tld), you will need to order a certificate for with a subject or alt-name of <code>domain.tld</code> (not <code>server.domain.tld</code>) from your preferred cert provider. The certificate should also include alt-names for subomains such as <code>conference.domain.tld</code>, at least for services that should be accessible to remote users.


== Step 2: Disable cleartext connections ==
=== Step 2: Disable cleartext connections ===
These instructions will disable any cleartext communication between servers and client connections.
These instructions will disable any cleartext communication between servers and client connections.


=== ejabberd ===
==== ejabberd ====
Make sure that your ''ejabberd.yml'' contains the [http://www.process-one.net/docs/ejabberd/guide_en.html#listened-options following settings].
Make sure that your ''ejabberd.yml'' contains the [http://docs.ejabberd.im/admin/guide/configuration/#listening-ports following settings].


* For client-2-server connections:
* For ejabberd >= 17.12 list all available PEM files in this top-level option
certfiles:
  - "/etc/ejabberd/*.pem"
 
* For client-to-server connections:
  listen:
  listen:
   -
   -
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     module: ejabberd_c2s
     module: ejabberd_c2s
     starttls_required: true
     starttls_required: true
     certfile: "/etc/ejabberd/certificate.pem"
     # For ejabberd < 17.12
    # certfile: "/etc/ejabberd/certificate.pem"


* For server-2-server Connections:
* For server-to-server connections:
  s2s_use_starttls: required
  s2s_use_starttls: required
  s2s_certfile: "/etc/ejabberd/certificate.pem"
  # For ejabberd < 17.12
# s2s_certfile: "/etc/ejabberd/certificate.pem"


Further help:
Further help:
* Homepage: [https://ejabberd.im/ ejabberd.im]
* Homepage: [https://www.ejabberd.im/ ejabberd IM]
* Chatroom: [xmpp:ejabberd@conference.jabber.ru?join ejabberd@conference.jabber.ru]
* Chatroom: [xmpp:ejabberd@conference.process-one.net?join ejabberd@conference.process-one.net]
* Documentation: [https://www.process-one.net/docs/ejabberd/guide_en.html ejabberd Installation and Operation Guide]
* Documentation: [http://docs.ejabberd.im/admin/guide/ ejabberd Installation and Operation Guide]


=== Prosody ===
==== Prosody ====
Ensure that ''prosody.cfg.lua'' contains the following settings in the [https://prosody.im/doc/configure#overview global section] of your config, or under the specific <code>VirtualHost</code> you want to secure:
Prosody is aiming to be secure by default, as of version 0.12.x no changes to the default configuration is required to enable or enforce encrypted connections.
  c2s_require_encryption = true
  s2s_require_encryption = true


Further help:
Further help:
Line 48: Line 49:
* Documentation: [https://prosody.im/doc/security Prosody.IM: Security]
* Documentation: [https://prosody.im/doc/security Prosody.IM: Security]


=== Metronome ===
==== Metronome ====
In Metronome's latest development tip, encryption requirement is the default setting, as long as TLS capability
In Metronome's latest development tip, encryption requirement is the default setting, as long as TLS capability
is available, and no configuration change is needed. Otherwise ensure that ''metronome.cfg.lua'' contains the
is available, and no configuration change is needed. Otherwise ensure that ''metronome.cfg.lua'' contains the
Line 56: Line 57:


Further help:
Further help:
* Homepage: [http://www.lightwitch.org/metronome Metronome IM]
* Homepage: [https://metronome.im Metronome IM]
* Chatroom: [xmpp:grimoire@muc.metronome.im?join grimoire@muc.metronome.im]
* Chatroom: [xmpp:grimoire@muc.metronome.im?join grimoire@muc.metronome.im]
* Documentation: [http://www.lightwitch.org/metronome/documentation lightwitch.org/metronome/documentation]
* Documentation: [https://metronome.im/documentation metronome.im/documentation]


=== Tigase ===
==== Tigase ====
See http://www.tigase.org/content/vhost-tls-required for more details:
See http://www.tigase.org/content/vhost-tls-required for more details:
  --vhost-tls-required = true
  --vhost-tls-required = true
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* Documentation: [http://www.tigase.org/admin-guide Admin guide]
* Documentation: [http://www.tigase.org/admin-guide Admin guide]


=== Openfire ===
==== Openfire ====
# Open the Openfire administration console
# Open the Openfire administration console
# Go to '''Server Settings''' under '''Server'''
# Go to '''Server Settings''' under '''Server'''
Line 90: Line 91:
* Documentation: [http://igniterealtime.org/projects/openfire/documentation.jsp Openfire documentation]
* Documentation: [http://igniterealtime.org/projects/openfire/documentation.jsp Openfire documentation]


== Step 3: Check your XMPP Security ==
=== Step 3: Check your XMPP Server Security ===
[http://xmpp.net/ Test your XMPP security] to be sure.
[http://xmpp.net/ Test your XMPP security] to be sure.
= Encryption Manifesto (archived) =
== Aim: Encrypt All XMPP Connections ==
This page provides instructions for XMPP server administrators to secure XMPP client and server connections ready for the following [https://github.com/stpeter/manifesto/blob/master/manifesto.txt ubiquitous encryption manifesto] test days:
* January 4, 2014 - first test day requiring encryption
* February 22, 2014 - second test day
* March 22, 2014 - third test day
* April 19, 2014 - fourth test day
* May 19, 2014 - '''permanent upgrade''' to encrypted network
To achieve this, we need to:
* Encrypt connections between clients and servers (C2S)
* Encrypt server to server connections (S2S)

Latest revision as of 16:51, 26 December 2023

Clients

need to add something...

Servers

An XMPP Server is considered secure when the following (minimum) items are present:

  • The server is running with a server certificate
  • The server is configured to not allow any cleartext communications - S2S and C2S
  • The server supports XEP-198
  • ...

Step1: Get a server certificate

Let's say you run an XMPP service for domain.tld (jids of user@domain.tld), you will need to order a certificate for with a subject or alt-name of domain.tld (not server.domain.tld) from your preferred cert provider. The certificate should also include alt-names for subomains such as conference.domain.tld, at least for services that should be accessible to remote users.

Step 2: Disable cleartext connections

These instructions will disable any cleartext communication between servers and client connections.

ejabberd

Make sure that your ejabberd.yml contains the following settings.

  • For ejabberd >= 17.12 list all available PEM files in this top-level option
certfiles:
 - "/etc/ejabberd/*.pem"
  • For client-to-server connections:
listen:
  -
    port: 5222
    module: ejabberd_c2s
    starttls_required: true
    # For ejabberd < 17.12
    # certfile: "/etc/ejabberd/certificate.pem"
  • For server-to-server connections:
s2s_use_starttls: required
# For ejabberd < 17.12
# s2s_certfile: "/etc/ejabberd/certificate.pem"

Further help:

Prosody

Prosody is aiming to be secure by default, as of version 0.12.x no changes to the default configuration is required to enable or enforce encrypted connections.

Further help:

Metronome

In Metronome's latest development tip, encryption requirement is the default setting, as long as TLS capability is available, and no configuration change is needed. Otherwise ensure that metronome.cfg.lua contains the following settings in the global section of your configuration: 

 c2s_require_encryption = true
 s2s_require_encryption = true

Further help:

Tigase

See http://www.tigase.org/content/vhost-tls-required for more details: 

--vhost-tls-required = true

By default Tigase will read VHosts certificates from certs/ subdirectory match domain name against .pem filename of the certificate. Alternatively configuration for particular vhost certificate could be specified explicitly in init.properties: 

basic-conf/virt-hosts-cert-<domain>=path/to/cert.pem

TLS for s2s connection is enabled by default; no option to configure it as required (certain domains can be configured to skip TLS for s2s with following configuration. For more information: --s2s-skip-tls-hostnames): 

--s2s-skip-tls-hostnames = domain1,domain2

In order to have improved security Tigase features "hardened mode" which turns off workaround for SSL issues, turns off SSLv2, forces enabling more secure ciphers suites and also forces requirement of StartTLS. 

--hardened-mode=true

Further help:

Openfire

  1. Open the Openfire administration console
  2. Go to Server Settings under Server
  3. Then open Security Settings in the list to the left
  4. Check both radiobuttons labeled Required
  5. Check the checkbox marked Accept self-signed certificates
  6. Done!

Further help:

Step 3: Check your XMPP Server Security

Test your XMPP security to be sure.

Encryption Manifesto (archived)

Aim: Encrypt All XMPP Connections

This page provides instructions for XMPP server administrators to secure XMPP client and server connections ready for the following ubiquitous encryption manifesto test days:

  • January 4, 2014 - first test day requiring encryption
  • February 22, 2014 - second test day
  • March 22, 2014 - third test day
  • April 19, 2014 - fourth test day
  • May 19, 2014 - permanent upgrade to encrypted network

To achieve this, we need to:

  • Encrypt connections between clients and servers (C2S)
  • Encrypt server to server connections (S2S)
Retrieved from "https://wiki.xmpp.org/web/index.php?title=Securing_XMPP&oldid=14886"