How to check the network port

How to check network ports: Popular topics and practical guides on the entire network

With the rapid development of Internet technology, network port query has become a hot topic that many users pay attention to. Whether it is troubleshooting network problems, configuring a firewall, or performing security detection, it is crucial to know how to query network ports. This article will combine popular topics in the past 10 days to provide you with detailed port query methods and attach structured data to help you quickly master relevant knowledge.

1. Check out popular online topics in the past 10 days

The following are network technology and related security topics that have been discussed more frequently on the entire network recently:

2. Detailed explanation of network port query method

The methods of querying network ports vary depending on the operating system. Here are a few common methods:

1. Windows system query port

In Windows systems, you can query the port status through the command line tool:

• Open the command prompt (Win+R, enter cmd).
• enternetstat -anoView all active ports and corresponding processes.
• usetelnet IP address Port numberTest port connectivity.

2. Linux/Mac system query port

Linux and Mac users can query ports through terminal commands:

• enternetstat -tulnCheck the port in the listening process.
• usess -tuln(Recommended) orlsof -i:port numberQuery the specific port occupancy.

3. Online tools and software recommendations

In addition to the system's own commands, you can also use third-party tools to scan the port:

3. Common port numbers and their uses

Understanding common port numbers can help quickly troubleshoot network problems:

4. Things to note about network security

When querying or managing ports, you need to pay attention to the following security matters:

• Close unnecessary open ports to reduce the attack surface.
• Regularly update system and firewall rules.
• Avoid using default port numbers (such as 3389 for Remote Desktop).

Summarize

This article combines recent hot topics to introduce in detail the query methods, tool recommendations and security suggestions for network ports. Whether it is an individual user or an enterprise administrator, mastering these skills can effectively improve network management efficiency and security. It is recommended to bookmark this article in case of emergency!