The proxy & privacy glossary

The 256-bit version of the Advanced Encryption Standard — the symmetric cipher securing most VPN tunnels, and the benchmark behind "military-grade" marketing.

The layered defenses — IP scoring, fingerprinting, behavioral analysis, challenges — that websites deploy to separate automated traffic from human visitors.

A browser that creates isolated profiles, each with its own consistent fake fingerprint, cookies and storage — letting one machine operate many distinct online identities.

A single gateway address that automatically routes each of your requests through different IPs from a large pool — rotation without managing IP lists.

Controlling a browser with code — Puppeteer, Playwright, or Selenium driving clicks, forms, and navigation for testing, scraping, and account operations.

A tracking technique that identifies you by the unique combination of your device's traits — screen, fonts, GPU, time zone — even with cookies off and IP changed.

An isolated browser identity — its own fingerprint, cookies, storage, and proxy — that a website perceives as one distinct person on one distinct device.

A tracking technique that draws an invisible image in your browser and hashes the result — tiny GPU and driver differences make the hash nearly unique to your device.

A challenge designed to be easy for humans and hard for bots — the checkpoint websites deploy when a visitor's trust score drops too low.

Carrier-Grade NAT — the ISP technique that puts thousands of customers behind one shared public IP, and the reason mobile proxy IPs are so trusted.

A proxy hosted on commercial server infrastructure. Fast and cheap, but its IP ranges are easy for websites to recognize and block.

A proxy IP assigned exclusively to one customer, so its reputation depends on your behavior alone — nobody else's abuse can burn it.

A privacy failure where your DNS lookups escape the VPN tunnel and go to your ISP's servers — revealing every site you visit despite the encryption.

Routing your traffic through two VPN servers in sequence, encrypted twice — so no single server ever knows both who you are and where you're going.

Choosing the geographic location of your proxy exit IP — by country, state, or city — so websites treat you as a local visitor from that place.

A real browser running without a visible window — full JavaScript and rendering for automation, but with detectable traces that anti-bot systems hunt for.

A trap laid for bots — invisible links, hidden form fields, or decoy systems that no human would touch, so touching them is a confession.

A proxy server that forwards web traffic over the HTTP protocol — the most widely supported proxy type for browsing, scraping, and general web requests.

The numeric label that identifies a device on a network — the internet's return address, and the single most-tracked identifier in online privacy.

A shared list of IP addresses flagged for abuse — spam, attacks, or bot traffic — that websites and mail servers consult to block traffic preemptively.

The trust score websites assign an IP address based on its type, history, and behavior — the invisible credit rating that decides if you're blocked before you load a page.

Authorizing access by IP address instead of credentials — you register your machine's IP with a service, and connections from it are trusted automatically.

A proxy using the newer, vastly larger IPv6 address space — extremely cheap per IP, but only useful against targets that fully support IPv6.

A static IP registered to a consumer ISP but hosted on fast datacenter hardware — residential-grade trust with server-grade speed and stability.