Using tcpdump for capture SIP packets
How to capture SIP packets with tcpdump (example)
tcpdump -nt -s 0 -A -i eth0 port 5060 -w call.cap
Tcpdump will create file call.cap
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Stripe webhook security for AI-built apps: don't trust payment events without verification
Stripe Checkout can be added quickly to an AI-built app, but a weak webhook can mark users as paid without a real payment. Check these webhook security basics before launch.
AI-built app security checklist: don't launch before checking these 15 things
AI-built apps can look finished while they are still leaking keys, exposing database rows, or trusting unsafe webhooks. Use this checklist before you put real users, client data, or payments into production.
Fujifilm Presets Cheat List: Provia, Velvia, Astia, Classic Chrome & Film Simulation Guide
A complete Fujifilm presets cheat list covering Provia, Velvia, Astia, Classic Chrome, Eterna, Acros and more. Learn when to use each film simulation, how they affect RAW and JPEG files, and which preset works best for portraits, landscapes, street photography, and video.
Install and Log In to Windows 11 Without a Microsoft Account
Windows 11 aggressively forces Microsoft account sign-in during setup. This guide shows how to install and use Windows 11 with a local account only, using reliable command-line methods that work on Home and Pro editions.