What is a Proxy?

A proxy is, quite literally, a middleman: instead of traffic flowing directly between two points, it passes through a third — which can therefore observe, filter, accelerate or conceal. Which side the middleman stands on separates the two uses that matter to companies. A forward proxy stands in front of your people: employee traffic to the internet flows through it — hence control (access policies, categories of sites blocked on workstations), visibility (traffic logs, with the corresponding transparency duties toward staff) and anonymization (the visited site sees the proxy, not the workstation) — plus a distinct commercial use: proxy services for web scraping and price checks from other geographies. A reverse proxy stands in front of your servers — and here it becomes essential infrastructure of any serious website, usually without the owner knowing its name: Cloudflare and its equivalents are exactly this, a global intermediary that absorbs the world's traffic, filters attacks (DDoS, bots), serves cached content (CDN speed), terminates SSL connections and balances load across servers; at smaller scale, an Nginx does the same job in front of your applications. For a decision-maker the practical relevance boils down to a few concrete situations: when the site needs protection and speed, "put a reverse proxy / Cloudflare in front" is the standard, cheap and correct answer; when IT proposes filtering employee traffic, the discussion is 20% technical and 80% internal policy (what is blocked, what is logged, how it is communicated — transparently, or it becomes a trust and GDPR problem); and when something "only fails from the office network", the corporate proxy is the first suspect. The classic confusion with VPNs: a proxy usually intermediates specific applications or traffic, while a VPN encrypts and tunnels the whole connection — for secure remote access to company resources, the VPN (or its zero-trust successors) is the tool, not the proxy.