View the complete version: [-- Port details and how to enable and disable ports --]
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TCP/UDP Common port number
7 Echo (PING)9 DiscardDaytimer19 Word Fuzhou Builder20/TCP FTP Data21/TCP FTP Control File Transfer Protocol22/TCP SSH Secure Login, File transfer (SCP), and port redirection23/tcp Telnet Unsafe Text transfer25/tcp SMTP
When surfing the internet, we often see the word "Port" and often use the port number. For example, if "21" is added after the FTP address, "21" indicates the port number. So what does port mean? How can I view the port number? Does a port become
1, 21 Ports:
Port Description: Port 21 is mainly used for FTP (file Transfer Protocol, Files Transfer Protocol) service.
Operation suggestion: Because some FTP server can log on anonymously, so it is often used by hackers. In addition, 21 port
1024 The following is reserved for the system, and from 1024-65535 is used by the userFor personal writing applications, try not to use a port number between 0 and 1024.1024 to 65535 we can program with. This is not a Linux rule, it is the socket
We often see "ports" such as 135, 137, 139, and 443 in various network or website technical articles. But what is the use of these network ports? Will it pose a potential threat to our computers? How many ports are useful?
Port: 0 service: Reserved
Answers to questions about how to create a server.
I. Role of peanut shells
First, let's take a look at the role of the peanut shell. Because the IP addresses obtained by ADSL dial-up access are different each time, the role of the peanut shell is
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