DEFAULTPORT
DEFAULTPORT is a term used in software development to designate the port number that a network service should use by default when no explicit port is provided. In many codebases, the value is defined as a constant named DEFAULTPORT, DEFAULT_PORT, or defaultPort and is read by the service at startup to determine which port to bind to.
The actual numeric value of DEFAULTPORT varies by project and is not standardized. Common choices include well-known
Usage and override: If a user does not specify a port, the service will attempt to bind
In libraries and frameworks, a module may expose DEFAULTPORT as part of its API to inform consumers
Security considerations: Relying on default ports can expose services to common scans and attacks. Administrators are
See also: default port, list of well-known ports, port forwarding.