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TCP UDP Ports


Official List

Port 9

Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications. The official usage are listed separately below its usage may change from time to time.

Official

Port Protocol (TCP/UDP) Title Description Port Type
Port 9 tcp discard Discard WELL KNOWN PORT
Port 9 udp discard Discard WELL KNOWN PORT
Port 9 sctp discard Discard WELL KNOWN PORT
Port 9 dccp discard Discard SC:DISC WELL KNOWN PORT

UnOfficial

Unofficialy or sometimes with conflict, the same port may be used by different applications.

Port Protocol (TCP/UDP) Description