Installing Ejabberd on Debian

Install Ejabberd

• For Debian 9

apt-get -t stretch-backports install ejabberd

• For Debian 10

apt install ejabberd

Edit /etc/ejabberd/ejabberd.yml

hosts:
#  - localhost
   - example.com

Let's Encrypt configuration

• Install Let's Encrypt and get an ECC certificate
• Replace your old Ejabberd certificate with a new one.

mv /etc/ejabberd/ejabberd.pem "/etc/ejabberd/backup.pem.$(date +%Y%m%d-%H%M%S)"; cat /root/.acme.sh/404.city_ecc/404.city.key /root/.acme.sh/404.city_ecc/fullchain.cer >> /etc/ejabberd/ejabberd.pem; chown ejabberd  /etc/ejabberd/ejabberd.pem;

• Delete 'mod_s2s_dialback: {}'. This is a deprecated option allowing the use of self-signed certificates s2s

  mod_roster:
    versioning: true
# mod_s2s_dialback: {}
  mod_shared_roster: {}

• Reload config

ejabberdctl reload_config

Creating a user from Linux console

ejabberdctl register user example.com password

SRV DNS configuration

Need if the ip of your site and the ip of your server are different or you use non-standard port

SRV record

_xmpp-client._tcp.example.com.	300	IN	SRV	0			1	5222	xmpp.example.com.
_xmpp-server._tcp.example.com.	300	IN	SRV	0			1	5269	xmpp.example.com.

A record:

Change ip 8.8.8.8 to your IP-adress

xmpp.example.com.	300	IN	A	8.8.8.8

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