Operating guide

Build a repeatable NO_PROXY test matrix for hostnames, ports, IPv4, IPv6 and CIDR rules, then prove traffic follows the intended route.

Diagnose stale proxy gateway DNS safely with a layered test for authoritative records, local caches, connection pools, IPv4, IPv6 and failover.

Measure residential proxy inventory retention, replacement quality and market drift after purchase with repeatable cohort and overlap tests.

Audit proxy fair-use terms, bandwidth measurement, soft caps, concurrency limits and overage behavior before an unlimited or fixed-price plan reaches production.

Turn a proxy uptime promise into an independent measurement plan covering usable availability, regions, exclusions, error budgets, incidents and service-credit evidence.

Build a controlled proxy failover drill that measures recovery time, route correctness, session impact, retry cost and data integrity before production.

A practical test plan for proving that browser requests use the intended proxy, finding PAC and bypass exceptions, and setting a safe production gate.

Measure sustainable proxy concurrency before scaling spend with staged load, useful-result validation, queue metrics, retry controls, and rollback gates.

Audit residential proxy sourcing, consent, ASN and prefix evidence, network classification, geo consistency, and operational controls before purchase.

Test proxy keep-alive, connection pooling, exit rotation, stale sockets, latency, and valid-result throughput before changing a production collector.