Proxies also allow the browser to make web requests to externally hosted content on behalf of a website when cross-domain restrictions in place to protect websites from the likes of data theft prohibit the browser from directly accessing the outside domains. Advertisers use proxy servers for validating, checking and quality assurance of geotargeted ads.

VPN subscriptions are not free and are often billed monthly. There is no time limit.

Not Helpful 0 Helpful Some products have been known to employ content analysis techniques to look for traits commonly used by certain types of content providers. Nmap network scanning.