[gonzo]

> use Linux kernel for routing when they need to operate above layer 3.

What could you possibly mean by this?

[0x000000E2]

When they need to handle UPD and TCP. Cloudflare's web application firewalls run at TCP and HTTP layer and use tuned Linux kernels for processing, not DPDK and userspace TCP as some think

Their line rate stuff for flood mitigation uses DPDK or similar