網路連接埠範圍分類

連接埠分配

連接埠號碼	分配
0-1023	Well-Known (a.k.a. ‘system’)	系統預留
1024-49151	Registered (a.k.a. ‘user’)	使用者指派
49152-65535	Dynamic/Private	動態和私人

 

• The Well Known Ports are those in the range 0–1023. On Unix-like operating systems, opening a port in this range to receive incoming connections requires administrative privileges or possessing of CAP_NET_BIND_SERVICE capability.
• The Registered Ports are those in the range 1024–49151.
• The Dynamic and/or Private Ports are those in the range 49152–65535. Randomly chosen port numbers out of this range are called ephemeral ports. These ports are not permanently assigned to any publicly defined application.

IANA does not enforce this; it is simply a set of recommended uses. Sometimes ports may be used for different applications or protocols than their official IANA designation. This misuse may be, for example, by a Trojan horse, or alternatively by a commonly used program that didn't get an IANA registered port or port range.

Well-Known port:On some systems, use of these ports requires privileged access.

 

看過上面的文字之後，自己建立web application的時候選擇連接埠號碼就要有個數羅。