21/tcp FTP 檔案傳輸協議

22/tcp SSH 安全登入、檔案傳送(SCP)和埠重定向


23/tcp Telnet 不安全的文字傳送


25/tcp SMTP Simple Mail Transfer Protocol (E-mail)


69/udp TFTP Trivial File Transfer Protocol


79/tcp finger Finger


80/tcp HTTP 超文字傳送協議 (WWW)


88/tcp Kerberos Authenticating agent


110/tcp POP3 Post Office Protocol (E-mail)


113/tcp ident old identification server system


119/tcp NNTP used for usenet newsgroups


220/tcp IMAP3


443/tcp HTTPS used for securely transferring web pages