debugging
How to Track Down a Rogue Device in Your Server Rack
A practical walkthrough for identifying unknown hardware on your network — from passive MAC discovery to LLDP, traffic mirroring, and prevention.
devopsnetworkingsecurity
debugging
Debugging DNS leaks: why your VPN isn't hiding what you think it is
Your VPN is up, traffic is tunneled — but DNS queries are still leaking to your ISP. Here's how to find the leak and stop it for good.
networkingsecuritydevops
debugging
How to get a free city.state.us domain for side projects
US locality domains under city.state.us are a forgotten corner of DNS — and a cheap way to get a real domain for side projects. Here's how to claim one.
dnswebdevnetworking
debugging
Why Docker bypasses UFW and how to actually lock it down
Docker publishes ports by editing iptables directly, which skips UFW entirely. Here's why it happens and three ways to actually lock things down.
dockersecuritydevops
debugging
Why Your App Went Down in Spain (And How to Survive IP Blocks)
Learn how to diagnose and fix regional IP blocking that takes down legitimate cloud-hosted apps as collateral damage from bulk anti-piracy enforcement.
networkingdevopscloud
debugging
Why Your VPN Gets Blocked and How Domain Fronting Solves It
Learn why VPN traffic gets detected and blocked by firewalls, and how domain fronting through trusted services like Google can disguise encrypted traffic as normal HTTPS.
networkingsecurityvpn
tutorial
Exploring MasterHttpRelayVPN-RUST: DPI Bypass Built in Rust
A look at MasterHttpRelayVPN-RUST, a Rust-based DPI bypass tool using Google Apps Script relays and TLS SNI concealment. Architecture breakdown and practical notes.
rustnetworkingprivacy
debugging
Why Your HTTPS Traffic Still Gets Blocked (and How DPI Evasion Works)
Understanding why HTTPS traffic gets blocked by DPI, how domain fronting and HTTP tunneling work, and practical solutions for restrictive networks.
networkingsecurityproxy
debugging
Why Your Lab Domain Suddenly Stopped Resolving (DNS Blocklists)
When your domain lands on a DNS blocklist, your entire lab breaks. Here's how to diagnose, fix, and prevent DNS blocklist issues.
dnsselfhostednetworking
debugging
How to Debug Encrypted API Traffic When Console.log Isn't Enough
When browser DevTools can't explain API failures, MITM proxies reveal what's really happening on the wire. A step-by-step debugging guide.
debuggingnetworkingwebdev
debugging
Why Your HTTPS Traffic Isn't Really End-to-End (And How to Fix It)
Your HTTPS traffic gets decrypted at reverse proxies before reaching your server. Here's how to audit, fix, and prevent TLS termination blind spots.
securitynetworkingdevops
debugging
Why Your DNS Resolver Might Be Silently Blocking Legitimate Domains
Learn how to debug and fix DNS resolution failures when security-filtered resolvers silently block legitimate domains you depend on.
dnsnetworkingdevops
tutorial
TapMap Finally Lands on Linux and Docker — Here's Why That Matters
TapMap now supports Linux and Docker. Here's how to set it up, where it fits in your stack, and what to watch out for.
devopsdockerlinux