موقع يشرح لك المنافذ لكل منفذ امره في الانترنت واختصاصه الخاص canyouseeme

Common Ports
FTP 21
SSH 22
Telnet 23
SMTP 25
Web 80
Pop 3 110
IMAP 143
Other Applications
Remote Desktop 3389
PC Anywhere 5631

https://lh3.googleusercontent.com/-tYp08xjwdRk/VhMNFKij26I/AAAAAAAAA9U/lgqUqzQT03E/s800-Ic42/canyouseeme3.gif

https://lh3.googleusercontent.com/-RrSI9FnBBm4/VhMNEiBnTEI/AAAAAAAAA9M/hFPlbgmfxaY/s720-Ic42/canyouseeme4.gif

https://lh3.googleusercontent.com/-q5DzZUdyP9M/VhMNEFtG41I/AAAAAAAAA9I/sd3MkdAILPQ/s666-Ic42/G3_ipconfigG3.gif

هذا الرابط
http://www.canyouseeme.org
والرابط تطلعه من النود