It's 3 AM in 2004 and I am staring at a debug log that ends with a single line of failure. A Cisco IOS process has tried to negotiate an IPSec session with a carrier-class peer and the negotiation has died at phase one. The escalation came in twelve minutes ago. The customer is one of the largest banks in the country. The CEO has been woken up. The packet captures will land in my queue in another four minutes. I have, at most, two hours to fix it before opening bell.
This is the year my education in networking actually starts. Not the certifications, not the textbooks, not even the wirespeed lab gear — the year of the escalation desk at Cisco TAC. Every shift was a thousand small lessons about the gap between what the RFCs promise and what the silicon actually delivers when a real customer's traffic is hitting it at three in the morning.
The lesson that stuck the hardest: there is a permanent gap between the textbook model of a VPN and what one looks like under load at a carrier. The textbook tells you tunnels are reliable, certificates rotate cleanly, and key exchange completes in a bounded number of round trips. None of that is true on a Friday night.
Twenty-two years later, I have six VPN companies — QuickZTNA, QuickSDWAN, 21Tunnel, StandVPN, MeshWG, and one more I will not name until we launch. Each of them traces back to a specific thing that broke that year at TAC, and to a specific feature the textbooks did not have a name for. I keep building VPN companies because I keep noticing the gap is wider than anyone is prepared to admit.
The boring middle of the internet — the layer that moves your packets between a laptop in Bengaluru and a database in Frankfurt — is mostly held together by a handful of small companies that take the gap seriously. The textbooks will not teach you which gaps matter. Spending one year at three in the morning will.