sudo apt-get install ejabberd
sudo ufw allow in 5222/tcp
sudo ufw allow in 5269/tcp
sudo ufw allow in 5280/tcp
sudo ejabberdctl register eric <password>
sudo vim /etc/ejabberd/ejabberd.cfg
%% Admin user {acl, admin, {user, "eric", "domain.com"}}.
%% Hostname {hosts, ["domain.com"]}.
http://domain.com:5280/admin