总结一些知名端口号

协议名	传输层协议	端口号
ftp···········································································································数据连接	tcp	20
ftp控制连接	tcp	21
ssh，scp	tcp	22
telnet	tcp	23
smtp email客户端	tcp	25
dns服务器与客户端交互	udp	53
dns服务器与辅助域名服务器交互	tcp	53
TFTP	udp	69
finger	tcp	79
http	tcp	80
Kerberos Authenticating agent	tcp	88
POP3	tcp	110
ident old identification server system	tcp	113
NNTP	tcp	119
IMAP3	tcp	220
HTTPS	tcp	443
nfs默认是udp可以选择tcp	udp	2049(默认)
vnc	tcp	5901