Blogs
Hands-on Experience with GitHub Copilot Agent Mode
Friday, February 28, 2025 in Copilot Series
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This post summarizes how to use GitHub Copilot in Agent mode, sharing practical experience. Prerequisites Use VSCode Insider; Install the GitHub Copilot (Preview) extension; Select the Claude 3.7 Sonnet (Preview) model, which excels at code …
A Few Ways to Safely Use Public IPv6
Friday, February 28, 2025 in Network
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Some people need to “go home” via public IPv6. Unlike Tailscale/Zerotier et al., which rely on NAT traversal to create direct tunnels, native IPv6 offers a straight-through connection. Cellular networks almost always hand out global IPv6 addresses, …
A New Choice for Ad Blocking—AdGuardPrivate
Thursday, February 20, 2025 in Tools
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AdGuardPrivate is a DNS–based service focused on protecting network privacy and blocking ads. Built atop the open-source project AdGuard Home, it uses intelligent traffic analysis and filtration to deliver a secure, high-performance browsing …
Using curl to Fetch DNS Results
Thursday, February 20, 2025 in Tools
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This article presents two methods to retrieve DNS query results using curl: DNS JSON format DNS Wire Format 1. DNS JSON Format Queries Returns DNS responses in JSON, making them easy to parse. Google curl -H 'accept: application/dns-json' …
How to Use Bing International Edition
Thursday, February 20, 2025 in Tools
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Some search engines refuse to innovate; valuable content keeps decreasing while ads keep multiplying. Many have started abandoning them and switched to Bing (bing.com). Bing comes in multiple versions: cn.bing.com is the China edition; search results …
Using Common DDNS Subdomains May Cause China Telecom Broadband Service Degradation
Wednesday, February 19, 2025 in Network
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I have been troubleshooting IPv6 disconnections and hole-punching failures for over three months. I’ve finally identified the root cause; here’s the story. My First Post Asking for Help—IPv6 Disconnections IPv6 had been working perfectly. Without …
Compliance Discussion of Reverse Proxy in Home Networks
Monday, February 17, 2025 in Network
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Background About 90 days ago, I encountered an IPv6 connectivity issue with China Telecom Hubei. After long-term observation and analysis, here are the findings. Problem Analysis Two initial suspected causes: PCDN usage detection No active use of …
Security Best Practices for Personal Domains
Friday, January 17, 2025 in Security
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Preface In the Internet era, cyber attacks have become the norm. Every day, countless automated tools scan every corner of the web looking for vulnerabilities. Many believe only large corporations become targets, but due to lower attack costs and …
Releasing Reserved Memory on a VPS
Tuesday, December 31, 2024 in Blogs
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By default, the Linux kernel reserves a block of memory for kdump, and its size is controlled by the crashkernel parameter. Most application developers rarely trigger kernel panics, so you can recover this memory by editing /etc/default/grub. If you …
How a vendor bypasses DNS blocking
Friday, December 13, 2024 in Offense & Defense
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Recently I noticed that the DNS public service IP is receiving abnormal traffic—tens of identical requests for the same domain every second, completely ignoring the DNS protocol and the global TTL value. At first I thought the IP belonged to an …