What Is a Rotating Proxy?

You point all your traffic at one gateway hostname from your proxy provider — something like `gw.example.com:8000` — and behind the scenes that gateway picks an outbound IP from its pool for each connection. There are two modes. Per-request rotation hands you a fresh IP for every single HTTP call; it's the best fit for stateless scraping, meaning each page stands alone and nothing carries over between requests. Sticky sessions keep the same IP for a set window (commonly 1, 10, or 30 minutes) so you can finish a multi-step flow on one IP — logging in, or walking from a search-results page to a detail page. Most providers offer both, and you choose by either connecting to a specific port or adding a username token like `user-session-abc123` that pins your session to one outbound IP.

Per-IP rate limits are the cheapest and most common defense a site can put up — a few rules in Cloudflare or in nginx (a popular web server), and any single IP making too many requests gets cut off. Rotation spreads your traffic across many IPs so none of them crosses that threshold. It also helps with IP-reputation blocks (sites that ban an IP once it looks suspicious): if one IP gets flagged, your next request comes from a clean one and you keep going. Rotation is not a cure-all — it does nothing against fingerprint-based detection (sites profiling your browser/TLS signature), behavioral tracking across sessions, or account-level rate limits — but for the large class of sites that block on IP alone, it's the single most effective lever.

Three rules. First, match the rotation mode to the workflow: per-request for stateless catalog crawling, sticky for login flows and multi-page sequences. Switching IPs mid-flow looks suspicious — a logged-in user's IP doesn't change on every click. Second, rotate within one geography: a session that starts in Germany and ends in Brazil is an obvious tell. Most providers let you limit the pool to a country, region, or city. Third, size the pool to the workload. If you send 10,000 requests per minute through a 100-IP pool, each IP still averages 100 requests per minute — plenty to trip a rate limit. As a rule of thumb, your pool size should comfortably exceed your peak request rate divided by the target site's per-IP limit.