If a proxy IP does not change when you expect rotation, the first question is what event actually triggers a new exit IP in your setup: a new request, a new session identifier, a new TCP connection, or a manual rotation action.<\/p>\n
That distinction matters because many teams test a rotating proxy in a browser or HTTP client that quietly reuses the same connection. When that happens, the proxy can behave like a sticky session even though the provider still supports rotation. Verify the provider’s session model and your client’s connection reuse behavior in the same test before you change vendors or replace the pool.<\/p>\n
Rotating proxy products do not all rotate on the same trigger. The Trusted Proxies guide to sticky sessions and manual rotation<\/a> explicitly distinguishes between holding one exit IP and forcing a new one. The Decodo explanation of sticky and rotating sessions<\/a> also notes that rotating mode changes IPs with every new connection, while sticky mode keeps the same IP for a longer session window.<\/p>\n Use that as the starting assumption: if the exit IP stayed the same, either your provider kept the same session on purpose or your client never created the kind of new connection that would trigger rotation.<\/p>\n Client behavior can hide a healthy rotating proxy. The Requests advanced usage docs<\/a> say that sessions persist parameters and that keep-alive is automatic within a session because urllib3 reuses underlying TCP connections. The urllib3 connection pool reference<\/a> adds that pooled connections are saved for reuse.<\/p>\n That pooling is useful for speed, but it changes how a backconnect proxy looks in production. The .NET pooled-connections case study<\/a> describes the failure mode directly: one TCP connection was opened, then reused for later requests, so the workload kept one exit IP even though the provider advertised rotation. Treat that as a normal troubleshooting branch, not an edge case.<\/p>\n Keep the target, account state, and request shape constant. Only change one layer at a time.<\/p>\n The goal is to learn which event actually changes the IP. If a fresh process or closed pool changes the exit while same-process requests do not, the main issue is connection reuse. If only a new session ID changes the exit, the provider is behaving like a sticky-session product until you rotate that session. If nothing changes across those checks, it is reasonable to test provider-side rotation settings, port choice, or support guidance.<\/p>\n The easiest mistake is to compare a rotating product against the wrong expectation. A checkout test, logged-in browser flow, or cart workflow may need a stable IP for continuity. A stateless collection task may need deliberate IP churn. If the workload needs stability, seeing one IP during the whole session can be correct behavior.<\/p>\n Use this interpretation order:<\/p>\nSeparate provider session mode from client connection reuse<\/h2>\n
What stays constant<\/th> What to verify next<\/th> What it usually means<\/th><\/tr><\/thead> Same exit IP, same session ID, same connection<\/td> Provider may be honoring a sticky session<\/td> Rotation is not supposed to happen yet<\/td><\/tr> Same exit IP, no explicit sticky setting<\/td> Check whether the client reuses one proxy tunnel<\/td> Connection pooling may be masking rotation<\/td><\/tr> New exit IP only after closing the client or browser<\/td> Compare provider docs with connection lifecycle<\/td> Rotation may be triggered by a new connection, not each request<\/td><\/tr> Exit IP changes but the target still behaves the same<\/td> Inspect cookies, account state, and request identity<\/td> The target may be grouping requests by something other than IP<\/td><\/tr><\/tbody><\/table><\/figure>\n Run a controlled four-step check before changing providers<\/h2>\n
Compare sticky sessions, rotating sessions, and connection-pooled traffic directly<\/h2>\n