How Accurate Is ProxyCheck for Detecting Proxies and VPNs? or Does ProxyCheck Really Block All Proxy

Honestly, no tool blocks *everything*. Proxycheck does like 90% of the job, which is better than most.

For the sneaky ones, I manually blacklist IP ranges. Pain in the butt, but it works.

Speed-wise, it’s negligible unless you’re running a mega-site.