Well-Know And Registered Ports - NetComm NB5Plus4 User Manual

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The reason for this is that when using NAT, your publicly accessible IP address will

be used by and point to your router, which then needs to deliver all trafﬁc to the

private IP addresses used by your PCs.

The Internet Assigned Numbers Authority (IANA) is the central coordinator for the

assignment of unique parameter values for Internet protocols. Port numbers range

from 0 to 65535, but only ports numbers 0 to 1023 are reserved for privileged serv-

ices and are designated as "well-known ports". The registered ports are numbered

from 1024 through 49151. The remaining ports, referred to as dynamic ports or

private ports, are numbered from 49152 through 65535.

Examples of well-known and registered port numbers are shown in Table 4, for fur-

ther information, please see IANA's website at: http://www.iana.org/assignments/

port-numbers