Disable Telnet service

This section describes why you should not use the Telnet service.

The Oracle XCA standard configuration does not use the Telnet service. By default, Telnet listens on port 23. Telnet, which sends clear-text passwords and user names through a log in, is a security risk to your servers. If the Telnet service is available on any system, disable Telnet in favor of Secure Shell (SSH). Disabling Telnet protects your system security.