Install personal Jabber Server on CentOS using ejabberd

Here’s a quick guide to install a jabber server on CentOS machine.

eJabberd Installation

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On your server type, as root user:

yum -y install ejabberd

Create an admin user for your server using the cli interface:

ejabberdctl register admin localhost yourpassword

Grant the created user admin privileges. To do this modify the /etc/ejabberd/ejabberd.cfg

%% Admin user
{acl, admin, {user, "admin", "localhost"}}.

%% Hostname
{hosts, ["localhost"]}.

Now you can start the server:

/etc/init.d/ejabberd start

Create a user

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You can perform all configuration via the web interface, but I prefer the command line. So, to add a new user via CLI, you can execute:

ejabberdctl register username yourdomain userpassword

replacing username, userpassword, and yourdomain with what you prefer.

By now you can connect using a jabber client to the configured server. By default the configured server port is 5222.

Configure DNS

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If you want to expose your server using an host/dns name, you should configure your dns server adding:

Doc DNS:

_xmpp-client._tcp.example.net. TTL IN SRV priority weight port target
_xmpp-server._tcp.example.net. TTL IN SRV priority weight port target
_xmpp-client._tcp.example.net. 86400 IN SRV 5 0 5222 example.net. 
_xmpp-server._tcp.example.net. 86400 IN SRV 5 0 5269 example.net.

Now you have an xmpp-server identified for your example.net domain.

Via: Source, DNS