Internet Infrastructure
167 episodes · Page 3 of 7
#4609: The PBX Ledger: What Cloud Phones Really Cost
We traded the PBX for UCaaS and CPaaS. But what did we actually lose — and what did we gain that was impossible before?
#4602: The Two Manifests: API vs PNR Explained
Passenger manifests aren't one list — they're two distinct data transmissions with different purposes, formats, and legal frameworks.
#4600: Why Can't You Port Your Number to Twilio?
Number portability breaks when you leave the carrier system. Here's why Twilio can't receive Israeli numbers — and what you can do instead.
#4599: Why Phone Numbers Are Stuck in the 1970s
Why SMS fails on virtual numbers, and what a SIP-first, IPv6-style phone number system would actually take.
#4578: Is Google Groups Just a Mail-Routing Workaround?
Daniel's been using Google Groups as a mail router for years. Is there a better way, or is he stuck with the workaround?
#4569: Dialing Without a Switchboard: Twilio Number Normalization
Twilio expects E.164, but Israel dials 0-3-... Here's what breaks when you become your own carrier.
#4541: What Would We Build If Cellular Started From Zero?
Exploring whether GSM's legacy parts—IMEI, SIM, circuit switching—are still needed in an all-IP world.
#4533: The Hidden Command Line in Your Phone's Dialer
Star-pound codes aren't just for forwarding calls. Your dialer is a secret command line with three different systems hiding behind it.
#4459: Fixed Egress IP From Anywhere: Is IP Allowlisting Dead?
How to get a static IP from anywhere for admin access — and whether IP allowlisting still makes sense in 2026.
#4454: Who Owns the Air? Wi-Fi Spectrum Rules Explained
Why your Wi-Fi channel changes, what DFS is, and how Israel, the US, and Europe regulate the air differently.
#4425: DNS Blocking That Doesn't Break Everything
How to block ads and trackers at the network level without breaking your spouse's banking app or your kid's game.
#4423: The Cookie That Changed the Web
Third-party cookies are dying, but first-party cookies aren't going anywhere. Here's what actually happens when you browse.
#4420: Tracing the IP Path of Your Phone Call in 2026
Do your calls travel over IP or old copper wires? We trace the messy, incomplete migration of telephony.
#4418: Where Is the Internet Still Missing?
96% coverage, but 2.6 billion people are offline. Where are the truly dark spots on Earth?
#4222: How Local Network Discovery Breaks with Custom DNS
Why your printer disappears when you run AdGuard Home — and how mDNS actually works.
#4178: DIY ISP Quality Dashboard Tools
Measure your real internet performance with self-hosted tools. No ISP speed tests, no guesswork.
#4159: Managed vs Unmanaged Switches: What You Actually Need
What does "managed" actually mean on an Ethernet switch? And do you need it at home?
#4085: The Clinton Email Server: A Technical Autopsy
What was actually in that Chappaqua basement? A technical breakdown of the most infamous self-hosted email server in history.
#4080: How Resumable Uploads Actually Work
What happens when your file transfer fails at 92% — and the app just picks up where it left off.
#4033: Why Your Fiber Upload Is Stuck at 250 Mbps
Your fiber plan promises 5 Gbps down but only 250 Mbps up. The bottleneck isn't the glass — it's the pricing sheet.
#4031: The Truth About Fiber Rollout Metrics
How “homes passed” hides a 24-point gap between political boasts and real availability.
#3907: Why the DNS Postman Metaphor Fails Learners
The postal metaphor for DNS is everywhere—but it's failing millions of learners. Here's what works better.
#3904: Manual NAT vs Double NAT: The Measurable Reality
Tracing OPNsense packet paths and quantifying double NAT's real latency cost.
#3902: Manual Network Config Demystified
Why your Linux box asks for gateway, subnet mask, and IP separately — and what each actually does.