常用网络协议端口号

 应用协议 端口号/协议 说明
ftp-data 20/tcp FTP, data
ftp 21/tcp FTP. control

telnet 23/tcp

smtp 25/tcp Simple Mail Transfer Protocol
time 37/tcp timserver
time 37/udp timserver
domain 53/tcp Domain Name Server
domain 53/udp Domain Name Server
tftp 69/udp Trivial File Transfer
gopher 70/tcp

http 80/tcp www-http World Wide Web

pop3 110/tcp Post Office Protocol-Version 3
nntp 119/tcp Network News Transfer Protocol
netbios-ns 137/tcp NETBIOS Name Service
netbios-ns 137/udp NETBIOS Name Service
netbios-dgm 138/udp NETBIOS Datagram Service
netbios-ssn 139/tcp NETBIOS Session Service
imap 143/tcp Internet Message Access Protocol
snmp 161/udp SNMP
snmptrap 162/udp SNMP trap
irc 194/tcp Internet Relay Chat Protocol
ipx 213/udp IPX over IP
ldap 389/tcp Lightweight Directory Access Protocol
https 443/tcp
https 443/udp
uucp 540/tcp
ldaps 636/tcp LDAP over TLS/SSL
doom 666/tcp Doom Id Software
doom 666/udp Doom Id Software
phone 1167/udp Conference calling
ms-sql-s 1433/tcp Microsoft-SQL-Server
ms-sql-s 1433/udp Microsoft-SQL-Server
ms-sql-m 1434/tcp Microsoft-SQL-Monitor
ms-sql-m 1434/udp Microsoft-SQL-Monitor
wins 1512/tcp Microsoft Windows Internet Name Service
wins 1512/udp Microsoft Windows Internet Name Service
1701/udp Layer Two Tunneling Protocol
1720/tcp
QQ 1080/UDP Socks 代理



《BT下载使用的端口》
BT默认使用的端口是6881,6882,6883.....6889 的TCP连接 (每一个下载只使用一个端口，顺次分配)