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380 articles · Page 2 of 4
Open Source Linux
Open Source Linux
Sep 26, 2024 · Information Security

Why Does a TCP Connection Send RST Packets? Deep Dive into Causes and Analysis

TCP RST packets, used to abruptly terminate or reject connections, appear at various stages—handshake, data transfer, and teardown—and can stem from server port closures, connection limits, malformed SYNs, firewall policies, timeouts, or middlebox interventions, with each scenario identifiable through detailed packet‑level analysis.

RSTTCPfirewall
0 likes · 9 min read
Why Does a TCP Connection Send RST Packets? Deep Dive into Causes and Analysis
Top Architect
Top Architect
Sep 14, 2024 · Information Security

Python WiFi Password Cracking GUI Tool Using pywifi and Tkinter

This article presents a step‑by‑step guide to creating a Python‑based Wi‑Fi password cracking GUI using the pywifi library and Tkinter, explains environment setup, code implementation, and usage, while also containing promotional material for related AI services and community groups.

PythonTkinterWiFi
0 likes · 14 min read
Python WiFi Password Cracking GUI Tool Using pywifi and Tkinter
Open Source Linux
Open Source Linux
Aug 14, 2024 · Information Security

Master Nmap: Step-by-Step Guide to Scanning Linux Ports

This guide explains how to use Nmap on Linux to perform simple, single‑port, full‑range, and custom port scans, interpret common port states, and understand typical service ports for effective network security testing.

Linuxnetwork securitynmap
0 likes · 7 min read
Master Nmap: Step-by-Step Guide to Scanning Linux Ports
Java Tech Enthusiast
Java Tech Enthusiast
Aug 11, 2024 · Information Security

Mass Home Router DNS Hijacking Detected by Tencent Cloud DNSPod

Tencent Cloud DNSPod uncovered a massive May‑2024 campaign that hijacked home routers by altering their DNS settings to malicious IPs—using default credentials and firmware flaws—to redirect users to phishing or illegal sites, urging owners to check router DNS, reset devices, and change passwords.

DNS hijackingdig commandmalicious DNS
0 likes · 5 min read
Mass Home Router DNS Hijacking Detected by Tencent Cloud DNSPod
Alibaba Cloud Observability
Alibaba Cloud Observability
Jul 31, 2024 · Information Security

Unlock DNS Log Insights: Detect Threats, Optimize Performance, and Master Cloud‑Native Auditing

This article explains how DNS logs serve as a foundation for network monitoring, security auditing, and performance troubleshooting, covering DNS parsing, record types, log‑audit integration with Alibaba Cloud SLS, practical query examples, and advanced analysis techniques for detecting anomalies and attacks.

Alibaba CloudDNSSLS
0 likes · 25 min read
Unlock DNS Log Insights: Detect Threats, Optimize Performance, and Master Cloud‑Native Auditing
MaGe Linux Operations
MaGe Linux Operations
Jul 30, 2024 · Information Security

Master Reverse SSH Tunneling: Access Behind Firewalls Easily

This guide explains what reverse SSH is, why it’s needed to reach machines behind restrictive firewalls, and provides step‑by‑step commands and configuration tips to set up a reliable reverse SSH tunnel for secure remote access.

SSH Tunnelingfirewall bypassnetwork security
0 likes · 6 min read
Master Reverse SSH Tunneling: Access Behind Firewalls Easily
Linux Cloud Computing Practice
Linux Cloud Computing Practice
Jun 24, 2024 · Information Security

How to Build a Secure OpenVPN Server on CentOS and Ubuntu

This guide walks you through installing Easy‑RSA, generating CA, server and client certificates, configuring OpenVPN, enabling IP forwarding, adjusting firewalls, and setting up client connections on Linux, macOS and Windows, providing a complete end‑to‑end VPN deployment solution.

CentOSEasy-RSAOpenVPN
0 likes · 21 min read
How to Build a Secure OpenVPN Server on CentOS and Ubuntu
Open Source Linux
Open Source Linux
May 23, 2024 · Information Security

Master Common Web & Network Attacks: SQL Injection, XSS, CSRF, DDoS & More

This article provides a comprehensive overview of prevalent web and network security threats—including SQL injection, XSS, CSRF, file‑upload flaws, DDoS, ARP/RARP spoofing, DNS attacks, routing protocols, TCP/UDP differences, HTTP nuances, cookies vs. sessions, and SSL/TLS—along with practical prevention techniques for each.

ARPCSRFDDoS
0 likes · 24 min read
Master Common Web & Network Attacks: SQL Injection, XSS, CSRF, DDoS & More
Java Tech Enthusiast
Java Tech Enthusiast
Apr 28, 2024 · Information Security

Unexpected Lateral Movement via Windows Delivery Optimization Service

A coworker noticed my computer generating large volumes of traffic on port 7680, prompting an investigation that revealed the svchost.exe process running the default Windows Delivery Optimization Service—intended for LAN‑based Windows Update—mimicking lateral‑movement behavior, which I stopped by disabling the feature.

Lateral MovementPort 7680Windows
0 likes · 4 min read
Unexpected Lateral Movement via Windows Delivery Optimization Service
Architects' Tech Alliance
Architects' Tech Alliance
Apr 4, 2024 · Fundamentals

Master Computer Networking Basics with 38 Comprehensive Mind Maps

This article compiles 38 detailed mind maps covering the entire computer networking curriculum—from the TCP/IP stack and transport protocols to routing, switching, VLANs, IPv6, and security technologies—providing a systematic visual guide for learners to quickly grasp and retain core concepts.

Computer NetworksIPv6Switching
0 likes · 7 min read
Master Computer Networking Basics with 38 Comprehensive Mind Maps
MaGe Linux Operations
MaGe Linux Operations
Mar 24, 2024 · Information Security

What Every Hacker Should Know: 27 Common Terms and Attack Techniques

This article provides a comprehensive glossary of 27 common hacking terms—from black‑hat and backdoor to zero‑day exploits and dark‑web concepts—explaining each technique, malware type, and security threat in clear, concise English for anyone interested in cybersecurity fundamentals.

Malwareaptcybersecurity
0 likes · 18 min read
What Every Hacker Should Know: 27 Common Terms and Attack Techniques
MaGe Linux Operations
MaGe Linux Operations
Mar 19, 2024 · Information Security

Master Linux Firewalls: iptables, firewalld, and Netfilter Explained

This guide details Linux firewall components—including iptables, firewalld, and netfilter—explaining their coexistence, rule tables, chain structures, command syntax, and configuration files, while providing practical examples for managing zones, services, and packet filtering on RHEL/CentOS systems.

Linuxfirewallfirewalld
0 likes · 30 min read
Master Linux Firewalls: iptables, firewalld, and Netfilter Explained
Practical DevOps Architecture
Practical DevOps Architecture
Mar 14, 2024 · Information Security

Comprehensive Penetration Testing Course Outline

This article provides a detailed curriculum for a penetration testing training program, covering operating system basics, web services, database setup, Kali Linux installation, various hacking tools, common web vulnerabilities, SQL injection techniques, command execution, file upload and inclusion flaws, XSS, CSRF, SSRF, privilege escalation, and internal network exploitation.

Penetration Testingethical hackinginformation security
0 likes · 10 min read
Comprehensive Penetration Testing Course Outline
MaGe Linux Operations
MaGe Linux Operations
Mar 11, 2024 · Information Security

Mastering CentOS7 Firewall: firewalld vs iptables and Zone Management

This guide explains the coexistence of firewalld and iptables on CentOS 7, compares their features, details zone concepts, outlines iptables architecture, and provides step‑by‑step commands for installing, configuring, and managing firewall rules, including rule syntax and saving configurations.

centos7firewallfirewalld
0 likes · 16 min read
Mastering CentOS7 Firewall: firewalld vs iptables and Zone Management
Liangxu Linux
Liangxu Linux
Feb 27, 2024 · Information Security

Understanding SSH: How Secure Shell Works and Why It Matters

SSH (Secure Shell) is a widely used network security protocol that replaces insecure methods like Telnet and FTP by encrypting data, authenticating users, and supporting key exchange, with default port 22, various authentication methods, and tools such as PuTTY and OpenSSH for secure remote access.

OpenSSHPuttySSH
0 likes · 9 min read
Understanding SSH: How Secure Shell Works and Why It Matters
Tencent Cloud Developer
Tencent Cloud Developer
Jan 23, 2024 · Information Security

Metis: Understanding and Enhancing In-Network Regular Expressions

Metis combines deterministic finite automata conversion, byte‑level RNN training, and knowledge‑distilled random‑forest models to replace traditional regex matching on resource‑constrained network devices, delivering comparable accuracy while achieving up to 74× higher throughput and significant resource savings in DDoS protection and P4 forwarding.

In‑network computingNeurIPS 2023P4 Programmable Switches
0 likes · 9 min read
Metis: Understanding and Enhancing In-Network Regular Expressions
Java Tech Enthusiast
Java Tech Enthusiast
Jan 21, 2024 · Information Security

Security Risks of Exposing Your Public IP Address

Exposing your public IP address can invite DDoS floods, vulnerability scanning, privacy breaches, and targeted phishing or malware attacks, so you should protect it with firewalls, regular updates, secure VPN connections, and by avoiding public disclosure on social platforms.

DDoSPublic IPfirewall
0 likes · 3 min read
Security Risks of Exposing Your Public IP Address
Tencent Architect
Tencent Architect
Jan 16, 2024 · Artificial Intelligence

Metis: AI‑Driven In‑Network Regular Expression Enhancement for High‑Performance Traffic Inspection

The article introduces Metis, an AI‑based solution that replaces traditional regular‑expression matching for network traffic inspection, offering faster, more accurate detection, a compact model deployable on resource‑constrained P4 switches, and significant performance and cost benefits for cloud gateway security.

AIP4knowledge distillation
0 likes · 9 min read
Metis: AI‑Driven In‑Network Regular Expression Enhancement for High‑Performance Traffic Inspection
Liangxu Linux
Liangxu Linux
Dec 26, 2023 · Fundamentals

Unlocking the Secrets of Computer Networks: From Physical Links to Application Layers

This comprehensive guide walks through computer networking fundamentals, covering basic concepts, the OSI/TCP‑IP layers, addressing, routing protocols, transport mechanisms, application services, security techniques, wireless LAN technologies, and essential command‑line tools, all illustrated with clear diagrams and examples.

Computer NetworksTCP/IPnetwork security
0 likes · 66 min read
Unlocking the Secrets of Computer Networks: From Physical Links to Application Layers
360 Quality & Efficiency
360 Quality & Efficiency
Dec 22, 2023 · Information Security

Testing Methods for Windows Filtering Platform (WFP) Network Drivers

This article explains the principles of the Windows Filtering Platform, outlines functional, compatibility, performance, and security testing techniques for WFP‑based network drivers, and presents a case study on diagnosing throughput issues using filter isolation tools.

Security TestingWFPWindows Filtering Platform
0 likes · 8 min read
Testing Methods for Windows Filtering Platform (WFP) Network Drivers
Xiaohongshu Tech REDtech
Xiaohongshu Tech REDtech
Dec 13, 2023 · Information Security

XiaoHongShu’s Zero Trust SASE Office Security Solution: Architecture, Challenges, and Implementation

XiaoHongShu’s award‑winning Zero‑Trust SASE Office Security Solution integrates all‑in‑one DLP, anti‑virus, identity‑bound access and distributed POPs to replace fragmented agents, delivering real‑time risk control, data‑non‑landing protection, multi‑level disaster recovery, and achieving 100% device coverage, an 80% reduction in data leakage and a 70% internal NPS after one year.

Office SecuritySASESecurity Architecture
0 likes · 14 min read
XiaoHongShu’s Zero Trust SASE Office Security Solution: Architecture, Challenges, and Implementation
AntTech
AntTech
Dec 1, 2023 · Information Security

Highlights of the 20th China Information and Communication Security Conference (CCICS 2023)

The 20th China Information and Communication Security Conference (CCICS 2023) held on December 1 in Beijing gathered leading academicians and industry experts to discuss emerging security challenges in 5G, AI, privacy computing, large‑model systems, and presented Ant Group’s innovative security parallel‑slice framework for modern digital enterprises.

5Gconferencenetwork security
0 likes · 6 min read
Highlights of the 20th China Information and Communication Security Conference (CCICS 2023)
Open Source Linux
Open Source Linux
Nov 10, 2023 · Information Security

Understanding SSH: Ports, Workflow, and Key Authentication Explained

This article explains the SSH protocol, covering its default port, the step‑by‑step process of establishing a secure connection, the role of symmetric and asymmetric encryption, and how password and public‑key authentication work with tools like PuTTY and OpenSSH.

AuthenticationKey ManagementOpenSSH
0 likes · 8 min read
Understanding SSH: Ports, Workflow, and Key Authentication Explained
Huolala Safety Emergency Response Center
Huolala Safety Emergency Response Center
Nov 6, 2023 · Information Security

What Is China’s Cybersecurity Grading System and How Did It Evolve to 2.0?

This article provides a comprehensive overview of China’s cybersecurity grading (等级保护) system, covering its legal foundations, the transition to the 2.0 framework, the core standards, organizational responsibilities, classification procedures, filing requirements, and ongoing supervision.

2.0 frameworkChinaGrade Protection
0 likes · 12 min read
What Is China’s Cybersecurity Grading System and How Did It Evolve to 2.0?
Java Architect Essentials
Java Architect Essentials
Nov 5, 2023 · Information Security

Quark and NetEase CC Platforms Fined for Violating Network Ecology and Content Safety Regulations

The Chinese authorities fined the Quark platform 500,000 yuan and ordered NetEase CC to suspend updates to its dance section for seven days after finding massive pornographic content, illegal keywords, and severe breaches of network security laws, prompting both platforms to pledge comprehensive remediation and stricter content controls.

ChinaPlatform Enforcementcontent moderation
0 likes · 5 min read
Quark and NetEase CC Platforms Fined for Violating Network Ecology and Content Safety Regulations
vivo Internet Technology
vivo Internet Technology
Oct 31, 2023 · Information Security

Network Port Security: Risks, Attack Methods, and Governance Practices

Network port security demands continuous discovery, automated vulnerability scanning, traffic‑baseline anomaly detection, and disciplined governance—including source authentication, first‑packet drop, and lifecycle management—to mitigate DDoS, application‑layer, and exploitation attacks while ensuring minimal‑privilege openings and timely closure.

DDoScc-attacknetwork security
0 likes · 25 min read
Network Port Security: Risks, Attack Methods, and Governance Practices
Liangxu Linux
Liangxu Linux
Oct 25, 2023 · Information Security

How to Bypass CDN and Discover a Website’s Real IP Address

This guide explains why penetration testers need a target’s true IP, how to detect CDN usage, and provides step‑by‑step techniques—including same‑country queries, sub‑domain probing, DNS history checks, FOFA searches, email reverse lookup, and full‑network scanning—to uncover the real server address.

CDNIP discoveryPenetration Testing
0 likes · 7 min read
How to Bypass CDN and Discover a Website’s Real IP Address
Laravel Tech Community
Laravel Tech Community
Oct 24, 2023 · Information Security

Configuring Firewalld on CentOS to Restrict Access to Specific Ports and IP Addresses

This article explains what Firewalld is, outlines its key features such as zones, runtime versus permanent settings, services, and dynamic updates, and provides step‑by‑step commands to create firewall rules that limit access to an Nginx server on port 8088 to a single IP address while leaving other ports unrestricted.

CentOSLinuxfirewall
0 likes · 8 min read
Configuring Firewalld on CentOS to Restrict Access to Specific Ports and IP Addresses
Test Development Learning Exchange
Test Development Learning Exchange
Oct 16, 2023 · Information Security

Python Techniques for Data Protection and Privacy: Encryption, Hashing, SSL/TLS, and Common Security Measures

This article presents practical Python examples for enhancing network security, covering symmetric and asymmetric encryption, hash functions, password hashing, SSL/TLS communication, SQL injection prevention, XSS mitigation, CSRF protection, and secure password storage to safeguard data and privacy.

CSRFPythonSQL injection
0 likes · 7 min read
Python Techniques for Data Protection and Privacy: Encryption, Hashing, SSL/TLS, and Common Security Measures
Network Intelligence Research Center (NIRC)
Network Intelligence Research Center (NIRC)
Oct 11, 2023 · Cloud Native

How XDP Is Redefining Network Performance Beyond Traditional Stacks

This article examines XDP (eXpress Data Path), a Linux kernel eBPF‑based technology that pushes packet processing to the earliest point in the network interface, delivering ultra‑low latency, enhanced security, and flexible custom processing for high‑performance routing, DDoS mitigation, and cloud environments.

Cloud NativeLinux kernelXDP
0 likes · 5 min read
How XDP Is Redefining Network Performance Beyond Traditional Stacks
ZhongAn Tech Team
ZhongAn Tech Team
Oct 9, 2023 · Information Security

Network Security Communication: Principles, Protocols, and Implementation in the ZA App

This article explains the fundamentals of symmetric and asymmetric encryption, one‑way and trapdoor functions, forward secrecy, TLS handshake, and how the ZA financial app applies a multi‑layered secure communication protocol—including certificate verification, replay protection, payload encryption, and request signing—to achieve robust, high‑performance network security across iOS, Android, and web platforms.

TLSasymmetric cryptographydigital certificates
0 likes · 21 min read
Network Security Communication: Principles, Protocols, and Implementation in the ZA App
Liangxu Linux
Liangxu Linux
Sep 26, 2023 · Information Security

Top 5 Wireshark Alternatives for Network Analysis and Security

This guide reviews five popular packet‑capture tools—Savvius Omnipeek, Ettercap, Kismet, SmartSniff, and EtherApe—detailing their features, platform support, licensing, and unique capabilities to help network engineers choose the right solution for traffic monitoring and security analysis.

Wireshark alternativesnetwork analysisnetwork security
0 likes · 7 min read
Top 5 Wireshark Alternatives for Network Analysis and Security
Liangxu Linux
Liangxu Linux
Sep 21, 2023 · Operations

How to Build a Simple Website Firewall with iptables on Linux

This step‑by‑step guide shows how to install iptables, clear existing rules, set default DROP policies, allow established connections and loopback traffic, block a specific IP from accessing port 80, save the configuration, and verify that the firewall works as intended.

Linuxfirewalliptables
0 likes · 5 min read
How to Build a Simple Website Firewall with iptables on Linux
dbaplus Community
dbaplus Community
Sep 18, 2023 · Information Security

Why Chrome Is Moving to HTTPS‑First: What It Means for Web Security

Chrome’s latest experiment aims to automatically upgrade all HTTP requests to HTTPS, detailing current HTTPS adoption rates, the new HTTPS‑First mode’s automatic upgrades, unsafe download warnings, phased rollout plans, and how users can enable the feature now for a more secure browsing experience.

ChromeHTTPSHTTPS‑First
0 likes · 5 min read
Why Chrome Is Moving to HTTPS‑First: What It Means for Web Security
Wukong Talks Architecture
Wukong Talks Architecture
Sep 18, 2023 · Information Security

Understanding Forward Proxy: Principles, Use Cases, and Nginx Configuration

This article explains the concept and practical applications of forward proxy, outlines its benefits for enterprise network security and access control, compares it with reverse proxy, and provides detailed Nginx configuration examples—including how to expose the client’s real IP—along with common tools and real‑world scenarios.

VPNforward proxynetwork security
0 likes · 12 min read
Understanding Forward Proxy: Principles, Use Cases, and Nginx Configuration
Software Development Quality
Software Development Quality
Jun 13, 2023 · Information Security

How to Perform Anonymous Online Port Scans with Scanless

This guide introduces Scanless, a Python‑based tool that leverages third‑party online scanners to conduct anonymous port scans, explains how to install it via Git and pip, demonstrates command‑line usage and Docker support, and lists the supported scanning services.

DockerPythonanonymous scanning
0 likes · 3 min read
How to Perform Anonymous Online Port Scans with Scanless
DaTaobao Tech
DaTaobao Tech
Jun 7, 2023 · Backend Development

Taobao Open Platform Gateway Architecture Evolution

Taobao’s open platform gateway has evolved into a modular, decentralized system that uses full asynchronous processing, multi‑cluster deployment, token‑based authentication, and advanced metadata caching to boost scalability, security, and performance while protecting privacy and enabling efficient large‑scale reporting.

Cloud ComputingMetadata CachingPerformance Optimization
0 likes · 8 min read
Taobao Open Platform Gateway Architecture Evolution
AI Cyberspace
AI Cyberspace
May 27, 2023 · Information Security

Mastering SSL/TLS: From CIAA Security Model to OpenSSL CA Setup

This comprehensive guide explains the CIAA security model for network transmission, details confidentiality, integrity, authentication, and availability, and walks through building a private CA with OpenSSL, configuring TLS 1.2/1.3, HTTPS authentication modes, SNI/ESNI extensions, and upgrading curl for HTTP/2 support.

PKISSLTLS
0 likes · 51 min read
Mastering SSL/TLS: From CIAA Security Model to OpenSSL CA Setup
Test Development Learning Exchange
Test Development Learning Exchange
May 20, 2023 · Information Security

Build a Simple Python Port Scanner: Step‑by‑Step Guide

This article explains how to create a Python‑based network port scanner that probes a target host, uses sockets and multithreading to detect open TCP ports, and provides clear usage instructions, sample code, and optional enhancements for faster or more comprehensive scanning.

Argument ParsingPort ScannerPython
0 likes · 9 min read
Build a Simple Python Port Scanner: Step‑by‑Step Guide
Open Source Linux
Open Source Linux
May 16, 2023 · Information Security

Mastering Linux Firewalls: From IDS/IPS to iptables and Netfilter

This comprehensive guide explains intrusion detection and prevention systems, firewalls, waterwalls, Netfilter, and essential Linux firewall tools such as iptables, firewalld, and nftables, covering their architectures, command syntax, rule management, NAT, and packet capture with tcpdump.

IDSIPSLinux
0 likes · 24 min read
Mastering Linux Firewalls: From IDS/IPS to iptables and Netfilter
Open Source Linux
Open Source Linux
Apr 28, 2023 · Information Security

Understanding Firewalls: Types, Operation, and Choosing the Right One

This article explains what firewalls are, how they inspect network traffic, the various deployment and operational types—including hardware, software, cloud, packet‑filtering, stateful, proxy, and next‑generation firewalls—and their respective advantages and disadvantages.

cloud firewallfirewallhardware firewall
0 likes · 14 min read
Understanding Firewalls: Types, Operation, and Choosing the Right One
Liangxu Linux
Liangxu Linux
Mar 26, 2023 · Information Security

Top 10 Vulnerability Scanners Every Security Professional Should Know

This article reviews the ten most popular vulnerability scanning tools—including OpenVAS, Tripwire IP360, Nessus, and others—detailing their key features, scanning capabilities, deployment options, and typical use cases to help security professionals choose the right solution for network and application vulnerability assessment.

NessusOpenVASPenetration Testing
0 likes · 10 min read
Top 10 Vulnerability Scanners Every Security Professional Should Know
Xiaohongshu Tech REDtech
Xiaohongshu Tech REDtech
Mar 16, 2023 · Industry Insights

How Xiaohongshu Secured a Top Spot in Shanghai’s “Panshi” Cybersecurity Drill

On March 10, Shanghai’s telecom and internet regulators held a summary conference for the 2022 “Panshi Action” cyber‑attack‑defense drill, where Xiaohongshu ranked third among 123 defending teams, earning awards for excellence and progress while showcasing its incident‑response and traceability capabilities.

ShanghaiXiaohongshuattack-defense drill
0 likes · 4 min read
How Xiaohongshu Secured a Top Spot in Shanghai’s “Panshi” Cybersecurity Drill
DeWu Technology
DeWu Technology
Mar 14, 2023 · Industry Insights

What Shanghai’s “Panshi Action” Cyber Drill Reveals About Industry Security

The 2022 Shanghai "Panshi Action" cybersecurity drill, organized by multiple municipal regulators, brought together 30 top security teams to test the defenses of 123 telecom and internet firms, resulting in awards, policy insights, and a call for stronger collaborative security measures across the city’s digital ecosystem.

Panshi ActionPolicyShanghai
0 likes · 5 min read
What Shanghai’s “Panshi Action” Cyber Drill Reveals About Industry Security
MaGe Linux Operations
MaGe Linux Operations
Mar 12, 2023 · Information Security

164 Real Network Security Interview Questions to Ace Your Tech Interview

This article compiles two extensive collections of network security interview questions—93 and 71 items respectively—covering topics such as SQL injection, XSS, CSRF, DDoS, protocol fundamentals, cloud security, penetration tools, and incident response, providing a comprehensive resource for anyone preparing for a security engineering role.

InfoSeccybersecurityinterview-questions
0 likes · 14 min read
164 Real Network Security Interview Questions to Ace Your Tech Interview
MaGe Linux Operations
MaGe Linux Operations
Mar 5, 2023 · Information Security

Top 10 Vulnerability Scanners Every Security Team Needs

This guide reviews the ten leading vulnerability scanning solutions, detailing each tool's key features, deployment options, and how they help organizations detect and remediate security weaknesses across networks, servers, cloud and container environments.

Penetration TestingSecurity toolsinformation security
0 likes · 7 min read
Top 10 Vulnerability Scanners Every Security Team Needs
Liangxu Linux
Liangxu Linux
Feb 27, 2023 · Operations

How to Open and Manage Linux Ports with firewalld and iptables

This guide walks you through enabling firewall services, adding permanent ports, and reloading rules on CentOS 7 using firewalld, as well as editing iptables files and restarting the firewall on CentOS 6, complete with command examples and common pitfalls.

CentOSLinuxfirewalld
0 likes · 4 min read
How to Open and Manage Linux Ports with firewalld and iptables
MaGe Linux Operations
MaGe Linux Operations
Dec 29, 2022 · Fundamentals

Essential Networking Fundamentals: 100 Key Concepts Explained

This article provides concise explanations for over 100 fundamental networking questions, covering topics such as link types, OSI layers, protocols, IP addressing, network devices, topologies, security measures, and configuration tools, offering a quick reference for students and professionals seeking a solid networking foundation.

IP addressingOSI modelnetwork security
0 likes · 31 min read
Essential Networking Fundamentals: 100 Key Concepts Explained
MaGe Linux Operations
MaGe Linux Operations
Dec 26, 2022 · Information Security

Master Linux Connection Tracking and iptables: Complete Guide

This article explains Linux connection tracking (conntrack), its implementation in Netfilter, and provides detailed instructions for using iptables—including rule queries, additions, deletions, modifications, saving, loading, match extensions, custom chains, and logging—to manage firewall behavior and network security effectively.

Linuxconntrackfirewall
0 likes · 31 min read
Master Linux Connection Tracking and iptables: Complete Guide
Practical DevOps Architecture
Practical DevOps Architecture
Dec 26, 2022 · Information Security

Understanding iptables: Tables, Chains, and NAT Operations

This article provides a comprehensive overview of iptables, detailing its host‑type filter table, limitations, the four main tables (filter, nat, mangle, raw), their respective chains, common command examples, and explains NAT concepts such as SNAT, DNAT, and MASQUERADE for Linux network security.

LinuxNATfirewall
0 likes · 6 min read
Understanding iptables: Tables, Chains, and NAT Operations
UCloud Tech
UCloud Tech
Dec 8, 2022 · Information Security

How UCloud Defeated a 1.2 Tbps DDoS Assault: Insights & Defense Strategies

This article examines a recent 1.2 Tbps DDoS assault on a major UCloud client, detailing the attack timeline, mixed flood and connection‑exhaustion techniques, geographic and device source distribution, and UCloud’s comprehensive mitigation strategies and best‑practice recommendations for robust information security.

Cloud ProtectionDDoSIoT security
0 likes · 7 min read
How UCloud Defeated a 1.2 Tbps DDoS Assault: Insights & Defense Strategies
MaGe Linux Operations
MaGe Linux Operations
Nov 16, 2022 · Fundamentals

Essential Networking Concepts: From OSI Model to VPN and Beyond

This comprehensive guide covers fundamental networking topics such as links, OSI layers, backbone networks, LANs, routers, protocols, IP addressing, security measures, cable types, and various network topologies, providing clear explanations for each concept.

TCP/IPnetwork protocolsnetwork security
0 likes · 31 min read
Essential Networking Concepts: From OSI Model to VPN and Beyond
Liangxu Linux
Liangxu Linux
Nov 6, 2022 · Information Security

How to Open and Manage Linux Firewall Ports on CentOS 6/7

This guide explains step‑by‑step how to check firewall status, enable firewalld, open specific ports, reload or restart the firewall, and modify iptables on CentOS 6 and 7, including useful commands and common pitfalls.

CentOSLinuxfirewalld
0 likes · 4 min read
How to Open and Manage Linux Firewall Ports on CentOS 6/7
Laravel Tech Community
Laravel Tech Community
Nov 6, 2022 · Information Security

Implementing Rate Limiting with iptables hashlimit Module

This article explains how to use the iptables hashlimit module to create a stateful rate‑limiting chain, details the required commands, clarifies the meaning of the --hashlimit‑upto and --hashlimit‑burst parameters, and provides an example illustrating credit‑based packet acceptance.

Linuxfirewallhashlimit
0 likes · 4 min read
Implementing Rate Limiting with iptables hashlimit Module
Bilibili Tech
Bilibili Tech
Nov 4, 2022 · Information Security

Analysis of Sliver C2 Tool Traffic Features and Detection Rules for Snort/Suricata

The paper systematically analyzes the Sliver C2 framework’s HTTP and HTTPS traffic, detailing URL, cookie, and parameter patterns as well as JA3/JA3S TLS fingerprints, and presents validated Snort and Suricata rules that reliably detect Sliver beacons while highlighting evasion challenges and broader applicability to emerging malware tools.

C2 detectionJA3Snort
0 likes · 17 min read
Analysis of Sliver C2 Tool Traffic Features and Detection Rules for Snort/Suricata
Open Source Linux
Open Source Linux
Oct 9, 2022 · Information Security

What Is a DDoS Attack? Understanding Types, Motives, and Trends

This article explains the fundamentals of Distributed Denial of Service attacks, covering their definition, key characteristics, common motivations, classification by technique and protocol layer, current attack statistics, target industries, and emerging trends shaping the future of DDoS threats.

DDoSDistributed Denial of Servicecyber attacks
0 likes · 14 min read
What Is a DDoS Attack? Understanding Types, Motives, and Trends
MaGe Linux Operations
MaGe Linux Operations
Sep 27, 2022 · Information Security

Understanding Network Security: Threats, Encryption, and Defense Mechanisms

This article provides a comprehensive overview of network security, covering passive and active threats, cryptographic models, digital signatures, authentication methods, key distribution, firewalls, and intrusion detection systems, highlighting essential concepts and practical defenses.

Firewallscryptographydigital signatures
0 likes · 14 min read
Understanding Network Security: Threats, Encryption, and Defense Mechanisms
DaTaobao Tech
DaTaobao Tech
Sep 27, 2022 · Information Security

Why HTTP Is Insecure and How HTTPS Solves It: A Deep Dive into TLS Handshakes

This article examines the inherent security flaws of plain HTTP, proposes four solution approaches, and explains why the fourth—combining digital certificates, asymmetric and symmetric encryption—forms the basis of HTTPS, then details TLS 1.2 handshake steps, cryptographic primitives, and practical implementation considerations.

HTTPSTLSTLS Handshake
0 likes · 21 min read
Why HTTP Is Insecure and How HTTPS Solves It: A Deep Dive into TLS Handshakes
Liangxu Linux
Liangxu Linux
Sep 22, 2022 · Information Security

Comparing Top Open-Source Linux Firewalls: Features & Use Cases

An overview of essential Linux firewall solutions—including iptables, IPCop, Shorewall, UFW, Vuurmuur, pfSense, IPFire, Smoothwall, Endian, and ConfigServer—covers their core functions, key features, and typical use cases, helping administrators choose the right tool for network protection.

Linuxfirewalliptables
0 likes · 9 min read
Comparing Top Open-Source Linux Firewalls: Features & Use Cases
Architects Research Society
Architects Research Society
Sep 19, 2022 · Artificial Intelligence

AI-Driven Assistants and AIOps Transform Enterprise Networks in 2022

The article examines how rapid AI adoption, AIOps, and hybrid‑work infrastructure investments are reshaping enterprise networking, security, and automation, highlighting AI‑powered assistants that can troubleshoot networks, the rise of SASE, and future trends toward human‑level AI performance.

AIAIOpsEnterprise IT
0 likes · 10 min read
AI-Driven Assistants and AIOps Transform Enterprise Networks in 2022
Sohu Tech Products
Sohu Tech Products
Sep 7, 2022 · Information Security

Detailed HTTPS Handshake Analysis Using Wireshark

This article explains the HTTPS protocol, its security advantages over HTTP, and provides a step‑by‑step Wireshark packet capture and analysis of a test website, covering TCP three‑way handshake, TLS ClientHello/ServerHello, certificate verification, key exchange, and encrypted data transmission.

HTTPSTLSTLS Handshake
0 likes · 15 min read
Detailed HTTPS Handshake Analysis Using Wireshark
Liangxu Linux
Liangxu Linux
Sep 4, 2022 · Information Security

Restrict Host and Docker Ports to a Specific IP Using iptables

This guide shows how to use iptables to allow only a designated IP address to access a host's port 80, how to apply the same restriction to Docker containers by adding rules to the DOCKER-USER chain, and how to make the settings persistent across reboots.

DockerLinuxfirewall
0 likes · 3 min read
Restrict Host and Docker Ports to a Specific IP Using iptables
Ziru Technology
Ziru Technology
Aug 5, 2022 · Information Security

Why Network Security Incident Response Matters: Strategies, Plans, and Real‑World Cases

This article outlines the current state of network security in China, the government's strong emphasis on it, the legal framework, the necessity of incident response, detailed emergency‑response procedures, Ziru's own security program, and three illustrative case studies including Log4j2, a 2021 drill, and a FastJson vulnerability.

case studycybersecurityemergency planning
0 likes · 11 min read
Why Network Security Incident Response Matters: Strategies, Plans, and Real‑World Cases
MaGe Linux Operations
MaGe Linux Operations
Aug 4, 2022 · Information Security

Essential InfoSec FAQ: From White‑Hat Basics to Advanced Attack Techniques

This comprehensive FAQ explains key information‑security concepts, covering white‑hat hacking, IP vs MAC addresses, common penetration‑testing tools, hacker types, footprinting methods, brute‑force, DoS, SQL injection, sniffing, ARP spoofing, MAC flooding, rogue DHCP, XSS, Burp Suite, pharming, defacement, website protection, keyloggers, enumeration, NTP, MIB, password‑cracking techniques, attack stages, and CSRF mitigation.

Penetration TestingVulnerabilitiescybersecurity
0 likes · 10 min read
Essential InfoSec FAQ: From White‑Hat Basics to Advanced Attack Techniques
Laravel Tech Community
Laravel Tech Community
Jun 20, 2022 · Information Security

Understanding iptables: Structure, Tables, Chains, Rules, and Practical Configuration

This article provides a comprehensive guide to iptables, explaining its hierarchical structure of tables, chains, and rules, detailing the built‑in tables (filter, nat, mangle, raw) and their chains, describing rule syntax and target actions, and offering practical command examples for listing, flushing, saving, setting default policies, and configuring SSH, HTTP, NAT, and IP‑based restrictions.

LinuxNATfirewall
0 likes · 17 min read
Understanding iptables: Structure, Tables, Chains, Rules, and Practical Configuration
Architects' Tech Alliance
Architects' Tech Alliance
Jun 10, 2022 · Information Security

Understanding Firewalls: Principles, Architecture, and Functions

This article explains what a firewall is, how it isolates risk zones from safe zones, its working principles, the typical architecture involving screening routers and proxy servers, and the key security functions it provides for protecting network communications.

Access Controlfirewallinformation security
0 likes · 6 min read
Understanding Firewalls: Principles, Architecture, and Functions
MaGe Linux Operations
MaGe Linux Operations
Jun 8, 2022 · Information Security

164 Must‑Know Network Security Interview Questions (Full List)

This article provides two comprehensive collections of network security interview questions, totaling 164 real‑world questions that cover fundamentals such as SQL injection, XSS, CSRF, protocol basics, cryptography, penetration testing techniques, and incident response, helping candidates prepare effectively for technical interviews and increase their chances of landing high‑pay offers.

cybersecurityinformation securityinterview-questions
0 likes · 14 min read
164 Must‑Know Network Security Interview Questions (Full List)
AntTech
AntTech
Jun 6, 2022 · Information Security

Five Years of China’s Cybersecurity Law: Achievements, Challenges, and Ant Group’s Technical Innovations

The article reviews the five‑year impact of China’s Cybersecurity Law, highlights progress in legal‑driven security governance, and details Ant Group’s advanced network and data security architectures, privacy‑preserving computing techniques, and collaborative recommendations for tackling emerging cyber threats.

Ant GroupChinaCybersecurity Law
0 likes · 7 min read
Five Years of China’s Cybersecurity Law: Achievements, Challenges, and Ant Group’s Technical Innovations
Top Architect
Top Architect
May 30, 2022 · Information Security

Implementing Transparent Encrypted Communication with mTLS Using Nginx and OpenSSL

This article explains how to secure cross‑data‑center traffic by applying TLS principles, setting up a private Certificate Authority, generating self‑signed certificates with OpenSSL, configuring mutual TLS (mTLS) on Nginx proxies for both HTTP and TCP streams, and verifying the setup with curl and redis‑cli commands.

NginxTLScertificate authority
0 likes · 24 min read
Implementing Transparent Encrypted Communication with mTLS Using Nginx and OpenSSL