Well-Known TCP Port Numbers
Only port numbers 0 to 1024 are reserved for privileged services and designated as well-known ports. Well-known ports are specified in RFC 1700.
In TCP/IP and UDP networks, a port is an endpoint to a logical connection and the way a client program specifies a specific server program on a computer in a network. The port number identifies what type of port it is. For example, port 80 is used for HTTP traffic. Some ports have numbers that are pre-assigned to them by the IANA, and these are called the "well-known ports" which are specified in RFC 1700.
List of Well-Known Ports
Port numbers range from 0 to 65536, but only port numbers 0 to 1024 are reserved for privileged services and designated as well-known ports. This list of well-known port numbers specifies the port used by the server process as its contact port.
|1||TCP Port Service Multiplexer (TCPMUX)|
|5||Remote Job Entry (RJE)|
|18||Message Send Protocol (MSP)|
|20||FTP -- Data|
|21||FTP -- Control|
|22||SSH Remote Login Protocol|
|25||Simple Mail Transfer Protocol (SMTP)|
|42||Host Name Server (Nameserv)|
|49||Login Host Protocol (Login)|
|53||Domain Name System (DNS)|
|69||Trivial File Transfer Protocol (TFTP)|
|108||SNA Gateway Access Server|
|115||Simple File Transfer Protocol (SFTP)|
|137||NetBIOS Name Service|
|139||NetBIOS Datagram Service|
|143||Interim Mail Access Protocol (IMAP)|
|150||NetBIOS Session Service|
|179||Border Gateway Protocol (BGP)|
|190||Gateway Access Control Protocol (GACP)|
|194||Internet Relay Chat (IRC)|
|197||Directory Location Service (DLS)|
|389||Lightweight Directory Access Protocol (LDAP)|
|396||Novell Netware over IP|
|444||Simple Network Paging Protocol (SNPP)|
For further information, see RFC 1700.
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