Public port number

TCP 2 1= file transfer, reverse construction, blade runner, Dolly Trojan, Fore, FTP Trojan, Stealth FTP, Larva, Webex, WinCrash.

TCP 22= Telnet protocol

TCP 23= Telnet), micro Telnet server (= TTS)

TCP 25= E-mail (SMTP)

TCP 80= hypertext server (Http),

TCP 1 10= E-mail (Pop3), ProMail.