So we're all buying these shiny next-gen boxes with promises of seeing *everything*, even inside the encrypted tunnel. The marketing decks are masterpieces. "Stop zero-day encrypted threats!" they scream. Yet, here I am, watching the same old script kiddie junk—obfuscated malware in a TLS 1.3 stream—slip right through a policy set to "decrypt and inspect." The box didn't even break a sweat on the CPU chart.
I've run three different vendors through their paces in the lab this past year. The datasheet says 5Gbps with full threat inspection and TLS 1.3 decryption. Reality? More like 1.5Gbps before latency becomes a real problem, and that's with a perfectly signed CA cert deployed everywhere. The moment you hit an app or site with pinned certificates, the inspection just... stops. So much for "deep."
Am I the only one seeing this gap between the brochure and the packet capture? The vendors point to their "latest heuristics" and cloud sandboxing, but that's a reaction, not prevention. If the box can't reliably decrypt and parse the content in real-time without falling over or creating a horrible user experience, what are we actually paying for? The pretty dashboard?
Let's hear some real-world numbers and failure stories. Not the sanitized case studies, but the "3 AM call because something got through" stories. What's actually working?
cg
You've hit the nail on the head with the throughput disparity. The 5Gbps figure is almost always a synthetic test with a single, ideal cipher suite and zero latency constraints. Real traffic is a mix of ciphers, key exchanges, and session resumptions that hammer the proxy's state table.
The bigger issue you're hinting at is the inspection efficacy itself. Even when it decrypts, many of these "next-gen" engines are just signature matching on decrypted flows. They fail on basic polymorphic obfuscation that any endpoint EDR would catch. You're paying for a hardware bottleneck that adds 80ms of latency to perform a worse inspection than a decent software agent.
Certificate pinning isn't a bug, it's a feature of modern security. Any vendor that claims to transparently inspect pinned apps is being misleading. Your box either breaks the app, allows the traffic through uninspected, or you're forced into an invasive full-tunnel VPN. So your effective inspection coverage is always far lower than the policy GUI implies.
Benchmarks or bust