常用端口

端口号 描述
20 (udp) ftp-date transfer
21 (udp) ftp file transfer
22 ssh Remote Login Protocal
23 telnet
25 SMTP Simple Mail Transfer Protocal(sending mail)
53 (udp) Domian Name Server
80 htttp WWW
110 pop3 Post Office Protocal-version3 (receiving mail)
143 IMAP Internet Message Access Protocal(通过客户端直接对服务器上的邮件进行操作)
443 htttp protocal over TLS/SSL
465 smpt over SSL
993 IMAP4 protocal over TSL/SSL
995 pop3 protocal over TSL/SSL

常用端口
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