Computer Network Security

Kali Linux Practical: Comprehensive Operating System Vulnerability Mining and Defense System Construction

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Kali Linux Practical: Comprehensive Operating System Vulnerability Mining and Defense System Construction

1. Technical System for Operating System Vulnerability Mining Operating system vulnerability mining is a core aspect of network security, encompassing the entire process from basic information gathering to deep vulnerability exploitation. Kali Linux, as the standard toolkit in penetration testing, integrates tools such as Nmap, Metasploit, and SQLmap, forming a vulnerability mining ecosystem that covers … Read more

Kali Linux: The Hacker’s Ultimate System! Detailed Installation Guide Included

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Kali Linux: The Hacker's Ultimate System! Detailed Installation Guide Included

Excerpt from the movie The MatrixThe tool featured in the movie is called: Nmap, which is the world’s most famous network scanning tool.What is Kali Linux? Kali Linux is a Linux operating system designed specifically for network security professionals. It is a super toolbox pre-installed with over 600 specialized tools.Want to learn hacking skills and … Read more

HTTP vs HTTPS: Unveiling the Key Differences in Network Security You Might Not Know

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HTTP vs HTTPS: Unveiling the Key Differences in Network Security You Might Not Know

1. Introduction to HTTP and HTTPS HTTP (HyperText Transfer Protocol) is a stateless communication protocol commonly used for transmitting hypertext (such as HTML pages) between clients (like browsers) and servers. However, it is merely a one-way communication protocol, and data is not encrypted during transmission, making it susceptible to man-in-the-middle attacks. Stateless means it cannot … Read more

WannaCry Virus Invasion: Industrial Control Systems Urgently Need Security Measures

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WannaCry Virus Invasion: Industrial Control Systems Urgently Need Security Measures

Abstract Currently, the security protection capability of industrial control systems in our country is still at a primary stage, making them highly vulnerable to hacker attacks. Just like the recent outbreak of WannaCry, if its variants spread to industrial system hosts, the worst consequence would be the paralysis of the industrial control host system, leading … Read more

Is Internal Network Isolation Truly Secure? The Hidden Corners of Hypervisor Security

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Is Internal Network Isolation Truly Secure? The Hidden Corners of Hypervisor Security

During a technical exchange, a client raised a rather common viewpoint: “Our hypervisors are deployed on an isolated management internal network, separate from the business network, and are completely inaccessible from the outside, so they are very secure and will not be attacked.” Placing core infrastructure in an isolated network is indeed the first step … Read more

FPGA Discussion: Where is the Massive Bandwidth of 100G Networks Used?

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FPGA Discussion: Where is the Massive Bandwidth of 100G Networks Used?

Introduction When we talk about 100G networks, many people’s first reaction is: “Isn’t this bandwidth a bit excessive? Can ordinary server CPUs handle it?” Indeed, the gigabit ports on home computers often do not reach full capacity, let alone 100G. However, the reality is that in data centers, AI training clusters, distributed storage, and telecom … Read more

The Ultimate Tool for Intranet Penetration: frp Makes Your Home Server Publicly Accessible

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The Ultimate Tool for Intranet Penetration: frp Makes Your Home Server Publicly Accessible

For those of you in the tech field, have you ever encountered the frustration of wanting to access your home NAS from the office, connect to a lab server while outside, or let friends experience your locally developed website, but are hindered by the lack of a public IP or unwillingness to pay for a … Read more

Common Linux Commands – Part 6

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Common Linux Commands - Part 6

Common Linux Commands – Part 6 6. Application Commands: -t filter: Indicates adding rules at the end of the chain (if no table name is specified, the default is the filter table) -I INPUT: Indicates adding an inbound rule at the first line of the filter table (-I INPUT 2 indicates adding an inbound rule … Read more

Unable to Open Douyin Command http://v.douyin.com/xxxx? Unlock 2 Opening Techniques in 1 Minute

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Unable to Open Douyin Command http://v.douyin.com/xxxx? Unlock 2 Opening Techniques in 1 Minute

🔺 Unable to Open Douyin Command http://v.douyin.com/xxxx? Ultimate Solution in 2 Minutes 🔺 (Tested version from September 2025, includes cross-platform adaptation techniques and anti-interception strategies) 🔍 Quick Check of the Root Cause ⚠️ Core Obstacles: Permissions Not Enabled: Douyin has not obtained clipboard reading permissions (Android requires manual authorization) Platform Interception: WeChat/browser defaults block external … Read more

Covert Penetration Testing Methods Based on Raspberry Pi

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Covert Penetration Testing Methods Based on Raspberry Pi

Abstract: With the annual increase of APT attacks, conventional penetration testing methods can no longer meet the diversified demands for network security detection in the current environment. Therefore, this article studies covert penetration methods, proposing an embedded PT penetration method using Raspberry Pi as a spy device, focusing on often-overlooked physical security vulnerabilities. This method … Read more