50
The following table has listed the well-known application and service port:
Server Protocol Service Port
WEB Server TCP 80
FTP Server TCP 21
Telnet TCP 23
NetMeeting TCP 1503、1720
MSN Messenger TCP/UDP
File
Send:6891-6900(TCP)
Voice:1863 、
6901(TCP)
Voice:1863 、
5190(UDP)
PPTP VPN TCP 1723
Iphone5.0 TCP 22 555
SMTP TCP 25
POP3 TCP 110