|0||Invalid port, usually used to analyze the operating system|
|1||Transmission Control Protocol Port Service Multiplexer Selector|
|5||Remote job login|
|18||message sending protocol|
|20||FTP file transfer protocol (default data port)|
|twenty one||FTP File Transfer Protocol (Control)|
|twenty two||SSH remote login protocol|
|twenty three||telnet (terminal emulation protocol), the Trojan Tiny Telnet Server opens this port|
|twenty four||Reserved for personal mail system|
|25||The port opened by the SMTP server for sending mail|
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