TSTayyab Samiintwilightwrites.hashnode.dev·8h ago · 7 min readGoing Deeper into AWSUptil here we have covered the following concepts EC2 ✅ Linux ✅ Node/Express ✅ PM2 ✅ Nginx ✅ DNS ✅ Cloudflare ✅ HTTPS/TLS ✅ Let's Encrypt ✅ Certbot ✅ If you havent checked the previous two posts you c00
RDRONI DASinsystemdesignacademy.hashnode.dev·12h ago · 6 min readTCP vs UDP: I sent 20,000 messages to a slow reader and UDP lost 70%Most explanations of TCP vs UDP say "UDP may lose data" and stop there. I wanted to see it happen on a normal laptop, with no simulation and no tricks. So I wrote a small Python script, sent 20,000 me00
MGMeet Gandhiinkeep-alives.hashnode.dev·16h ago · 17 min readI wrote bi-directional tcp congestion control... and survived!I'm back again after a loong break but this time I have done a lot of things apart from what I said in the last blog (obviously 🙃). This time I'll be discussing on how I wrote the logic for using TCP00
DTDavid Timothyindigitalunpacked.hashnode.dev·1d ago · 8 min readHow Windows 11 Heuristics Break VPN Kill Switches (and the WcmSvc Fix)If you maintain a hardened local development environment with an always-on VPN, your workstation boots straight into a defensive security stance. Clients like Mullvad, IVPN, or custom WireGuard tunnel00
IInstaTunnelininstatunnel.hashnode.dev·19h ago · 8 min readFixing SSE Buffer-Bloat in Local Tunnels: Guaranteeing Zero-Latency Streaming for Local LLMsYou’ve just deployed a state-of-the-art local LLM using vLLM, Ollama, or llama.cpp. When you test it on localhost, the token generation is a thing of beauty—a smooth, continuous stream of text that fe00
PSParimal Savajinsavaj-parimal.hashnode.dev·1d ago · 4 min readThe Network Layer & IP Addressing: Subnetting, Packets, NAT, and ICMPIn our earlier Network Layer blog, we covered the foundational topics that make up the addressing system of the internet: IP Addressing: How an IP address functions as a unique numerical label assign00
MCmhk cyberinmhk-cyber.hashnode.dev·1d ago · 6 min readMy First Wireshark PCAP: Kongtuke Rebuke! So I decided to learn Wireshark. I watched like a 20minute video on YouTube, understood the basics, how to apply filters, conversations, endpoints, some of the protocols, etc. Nothing too crazy. Then 00
IInstaTunnelininstatunnel.hashnode.dev·1d ago · 10 min readStable Redirects for Auth Testing: Debugging JWT Vulnerabilities with Persistent SubdomainsIf you spend your days building Identity and Access Management (IAM) systems or hunting for bugs in authentication flows, you are likely intimately familiar with the pain of the ephemeral tunnel. You 00
IInstaTunnelininstatunnel.hashnode.dev·2d ago · 10 min readYour Localhost Is Not Private: Securing Developer Environments Against Localhost SSRF and DNS RebindingMost developers treat localhost as a trust boundary. Anything bound to 127.0.0.1 is assumed to be reachable only by you. That assumption has failed repeatedly, in browsers, AI tooling, dev servers and00
JJJozzieTechinjjozzietech.hashnode.dev·3d ago · 13 min readFour lines of patched JavaScript, and the router VM that deleted themTwo small patches to a dependency file called ssdp.js. Four lines of changed JavaScript, total. They kept the fleet's nodes reachable from the internet, and they were the reason every incident on the 00
