Most advice about scraping Cloudflare-fronted sites is asserted, not measured. "Use residential IPs." "Match Chrome's JA3." People repeat these like folklore. We run a proxy network, so we had the tooling to actually test them — and the results contradicted the two most common pieces of advice.

Here's what we ran, and what failed.

The test

Two variables, four combinations:

Exit IP: a Psychz datacenter address vs a Frontier Communications residential line (both US).