Open port

（重定向自Closed port）

In security parlance, the term open port is used to mean a TCP or UDP port number that is configured to accept packets. In contrast, a port which rejects connections or ignores all packets directed at it is called a closed port.

Ports are an integral part of the Internet's communication model — they are the channel through which applications on the client computer can reach the software on the server. Services, such as web pages or FTP, require their respective ports to be "open" on the server in order to be publicly reachable.

单词	Closed port
释义	Closed port 原声例句 BBC 听力 2019年7月合集 Italy's Interior Minister Matteo Salvini closed Italian ports to migrant rescue vessels thirteen months ago. 意大利内政部长马泰奥·萨尔维尼在13个月前禁止移民救援船只进入意大利港口。英语百科 Open port （重定向自Closed port） In security parlance, the term open port is used to mean a TCP or UDP port number that is configured to accept packets. In contrast, a port which rejects connections or ignores all packets directed at it is called a closed port. Ports are an integral part of the Internet's communication model — they are the channel through which applications on the client computer can reach the software on the server. Services, such as web pages or FTP, require their respective ports to be "open" on the server in order to be publicly reachable.
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