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0-9
0 TCP UDP RESERVED Technique sometimes used in network programming.
More 1 TCP TCPMUX - TCP Port Service Multiplexer
Allows any of multiple TCP services to be contacted by their service name. RFC 1078.
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Trojans - Sockets des Troie
2 TCP Management Utility Formerly used by Compressnet product for compression of TCP WAN traffic.
3 TCP Compression Process Formerly used by Compressnet product for compression of TCP WAN traffic.
4 TCP UDP Unassigned
5 TCP UDP Remote Job Entry Mechanism for executing batch jobs remotely. RFC 407
6 TCP UDP Unassigned
7 TCP UDP Echo When enabled for debugging purposes, returns to the source any data received. RFC 862
8 TCP UDP Unassigned
9 TCP UDP Discard When enabled for debugging purposes, throws away any data received with no response sent. RFC 863
