Five Questions About Linux Network Firewalls (Part 4): The Efficient Framework and Data Structures of nftables

Five Questions About Linux Network Firewalls (Part 4): The Efficient Framework and Data Structures of nftables

Question 4: What other methods does nftables use, besides hash tables, to address the pain points and bottlenecks of iptables? nftables is a modern framework for network traffic filtering in the Linux kernel, designed to replace iptables and address its pain points in terms of performance and flexibility. In addition to using hash tables to … Read more

Collection of 50 Linux Software

Collection of 50 Linux Software

Audio Airtime – Airtime is an open-source broadcasting software for scheduling and remote site management. Ardour – Record, edit, and mix on Linux. Audacious – An open-source audio player that plays your music the way you want without consuming your computer’s resources for other tasks. Audacity – Free, open-source, cross-platform audio recording and editing software. … Read more

A Linux Intrusion Investigation

A Linux Intrusion Investigation

According to the received threat intelligence report, the hacker group IronShade has launched attacks against Linux servers in the region. To prevent attacks from this APT organization and understand their attack patterns, our team set up a honeypot, exposing weak SSH and ports. As security analysts, we need to conduct a comprehensive intrusion assessment on … Read more

100 Essential High-Frequency Linux Commands for Reference

100 Essential High-Frequency Linux Commands for Reference

The following is a complete reference manual for 100 high-frequency Linux commands, categorized with command names, function descriptions, common parameters, and typical use cases: 1. File and Directory Operations (15 commands) Command Function Description Parameter Examples Typical Use Case <span><span>ls</span></span> List directory contents <span><span>-l for detailed information </span></span><code><span><span>-a</span></span>Show hidden files <span><span>ls -la /etc</span></span> <span><span>cd</span></span> Change … Read more

Homemade Electromagnetic Catapult Aircraft Carrier, Drones, and Perfume

Homemade Electromagnetic Catapult Aircraft Carrier, Drones, and Perfume

Hefei No. 168 Middle School Research-basedLearningDefense Remarkable Achievements In the galaxy of knowledge, the light of exploration has always been so dazzling. Recently, Hefei No. 168 Middle School successfully held a research-based learning defense activity, akin to a feast of knowledge, allowing students to freely swim in the ocean of academia, showcasing their wisdom and … Read more

What Are the Countermeasures for Interference Resistance in PLCs and Touch Screens?

What Are the Countermeasures for Interference Resistance in PLCs and Touch Screens?

Click the blue text Follow us Sometimes we follow too many public accounts and miss some of the messages we like, unable to see the updates from the Industrial Control Forum in time. We can star or pin the public account. How to star and pin? 【Open an article from the Industrial Control Forum public … Read more

WiFi Module Industry Report (2025-2031) | Global Market Size CAGR 13%

WiFi Module Industry Report (2025-2031) | Global Market Size CAGR 13%

Excerpt from the report: Current status and future development trends of the global and Chinese WiFi module market (2025-2031) Product Overview Wi-Fi modules are small components integrated into various electronic devices and equipment, enabling them to connect to wireless networks. These modules facilitate data communication between devices and networks through Wi-Fi standard protocols (such as … Read more

Essential Guide for Test Engineers: How to Test ADCs and DACs?

Essential Guide for Test Engineers: How to Test ADCs and DACs?

Today, numerous applications rely on Digital-to-Analog Converters (DACs) and Analog-to-Digital Converters (ADCs). They are crucial in signal processing as they bridge the gap between digital systems and analog systems. By enabling digital circuits to interact with analog components, ADCs and DACs play a key role in fields such as audio processing, telecommunications, and data acquisition … Read more

How to Reduce Intra-Pair Skew in 224G DAC Cables

How to Reduce Intra-Pair Skew in 224G DAC Cables

Editor’s Note: This article is written by two experts from Luxshare, Chuck Grant and Andrew Kim. It provides a comprehensive overview of intra-pair skew in 224G high-speed cables, validated through simulations and measured data under various bending and thermal conditions, discussing how to control skew and its impact on error rates during design, production, and … Read more

Energy-Saving Solutions: The DAC Arc-Shaped Hyperbolic Feeding Device for Roller Presses

Energy-Saving Solutions: The DAC Arc-Shaped Hyperbolic Feeding Device for Roller Presses

1. Overview To optimize energy consumption levels in the cement industry and respond to national low-carbon and environmental protection requirements, efforts are being made to promote energy-saving and carbon-reduction upgrades. This includes the upgrading of grinding equipment and process optimization as part of comprehensive energy efficiency improvement initiatives. The roller press grinding system has become … Read more