Common Computer ports

Port 21: Port 21 is mainly used for FTPFile Transfer Protocol and file Transfer Protocol) services.
Port 22Ssh service for major users on port 22
Port 23Port 23 is mainly used for Telnet remote logon. It is a common logon and simulation program on the Internet.
Port 25SMTPSimple Mail Transfer Protocol (Simple Mail Transfer Protocol) is enabled on servers that are mainly used to send emails. Most Mail servers use this Protocol today.
Port 53: Port 53 is the DNSDomain Name Server and Domain Name Server. The Server is open for domain Name resolution. DNS is the most widely used in the NT System.
Port 67, port 68: port 67, and port 68 are opened for the Bootstrap Protocol Server of the Bootp service) and Bootstrap Protocol Client.
Port 69: TFTP is a simple file transfer protocol developed by Cisco, similar to FTP.
Port 79: port 79 is open for the Finger service. It is mainly used to query details of users such as online users of remote hosts, operating system types, and whether a buffer overflow occurs.
Port 80: Port 80 is open for HTTPHyperText Transport Protocol (Hypertext Transfer Protocol). This is the most widely used Protocol for surfing the Internet. It is mainly used to transmit information on WWWWorld Wide Web and World Wide Web Services.
Port 99: port 99 is used for a service named "metemedirelay" sub-countermeasure delay. This service is rare and generally unavailable.
Port 109Is open for POP2Post Office Protocol Version 2, Post Office Protocol 2) services,
Port 110Is open for POP3 mail protocol 3). POP2 and POP3 are mainly used to receive mails.
Port 111: port 111 is the port opened by SUN's RPCRemote Procedure Call. It is mainly used for internal process communication between different computers in a distributed system, RPC is an important component in a variety of network services.
Port 113: port 113 is mainly used for the Authentication Service of Windows ).
Port 119: port 119 is open for the "Network News Transfer Protocol" Network newsgroup Transmission Protocol (NNTP.
Port 135: port 135 is mainly used to use RPCRemote Procedure Call, remote process Call) Protocol and provide DCOM Distributed Component Object Model) service.
Port 137: Port 137 is mainly used for "NetBIOS Name Service" NetBIOS Name Service ).
Port 139: Port 139 is provided for "NetBIOS Session Service" and is mainly used to provide Windows file and printer sharing and Samba Service in Unix.
Port 143: Port 143 is mainly used for "Internet Message Access Protocol" v2Internet Message Access Protocol (IMAP ).
Port 161: Port 161 is used for "Simple Network Management Protocol" Simple Network Management Protocol (SNMP ).
Port 443: Port 443 is the Web browsing port, which is mainly used for HTTPS services. It is another type of HTTP that provides encryption and transmission through secure ports.
Port 3306; Mysql Port
Port 3389: Win Remote Desktop Port

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