DirectAdmin, a web hosting control panel software, uses TCP port 2222 for secure access to the admin interface. Additionally, EtherNet/IP Implicit Messaging for Rockwell Automation ControlLogix PLCs also uses this port. Some SSH servers, like the one used in the Kippo SSH Honeypot, are also configured to use port 2222 instead of the default port 22 to avoid conflicts and enhance security.
No information available