How to Fix Cloudflare Proxy Issues: Same Session ID, Different IPs

TL;DR

• CapSolver returns this dynamic DNS error when the submitted proxy hostname matches its gateway check for certain proxy endpoints.
• A 10-minute sticky session does not guarantee that your script and the solver use the same exit IP.
• Ask your proxy service for another supported entry point, preferably a region-specific gateway, and update both configurations.
• Start a fresh attempt and verify the actual exit IP; changing the hostname alone does not guarantee success.

When using AntiCloudflareTask, you may receive:

Your proxy host uses dynamic DNS, which will result in different IP. Please change your proxy host to a specific region

This can happen even when the proxy is already in your script and its sticky session lasts 10 minutes. CapSolver checks the proxy host submitted with the task. To address this error, check the gateway endpoint first—not just the session duration.

Why can the same session ID use different IPs?

Some proxy services have gateways in several regions. When you use a global proxy hostname, the service may route each connection to a different regional gateway based on where the request starts.

Imagine your script runs in Europe and the remote solver runs in another region. Both use the same proxy hostname and session ID, but the connections take different paths:

• Your script → European gateway → exit IP A
• Remote solver → another regional gateway → exit IP B

If each gateway keeps its own session records, the same session ID can refer to one IP at the first gateway and another IP at the second. Both IPs could remain unchanged for 10 minutes, yet they would still be different from each other.

A sticky session controls how long an IP assignment lasts. It does not necessarily make different regional gateways share that assignment. This depends on how the proxy service routes requests and manages sessions.

That is why matching the hostname, session ID, and session duration may not be enough. Ask the proxy service for a supported regional entry point that lets both your script and the solver use the same exit IP, then verify the result.

Also distinguish the gateway from the exit: DNS resolves the hostname to a network address, as described in the MDN DNS overview. That gateway address is not necessarily the public IP seen by the target website.

What does this error actually tell you?

This message tells you that the submitted proxy host matched CapSolver’s gateway check. It does not prove that an IP change was measured during your individual request, and it is not an error issued by Cloudflare.

The underlying concern is valid: Cloudflare’s challenge limitations state that receiving a Managed Challenge from one IP and solving it from another is unsupported. A longer sticky-session timer cannot fix separate gateway mappings.

How to fix it in three steps

Fix the endpoint, align both request paths, and then test a fresh attempt.

1. Get a supported regional gateway

Ask your proxy service whether it provides another hostname for the same product, such as a US or EU regional entry point instead of an automatically routed global gateway.

You can ask:

Do you offer a region-specific endpoint that keeps the same exit IP when my script and a remote solver use identical sticky-session credentials?

If the service provides a supported fixed gateway IP instead, use its supplied address and connection instructions. Do not invent a hostname or replace it with an arbitrary IP from a DNS lookup. A fixed gateway address does not necessarily mean a fixed exit IP.

Changing to another generic hostname is not enough unless its routing behavior addresses the problem. Confirm the supported alternative with the service.

2. Update both your script and AntiCloudflareTask

Set the replacement endpoint in both places:

• The proxy used by your script to request the target page.
• The proxy field submitted with AntiCloudflareTask.

Keep the intended account, port, protocol, session ID, and region settings aligned. Follow the supported proxy formats; different clients may represent the same configuration differently.

A proxy configured only in your script does not automatically configure the remote solver. Check the actual outgoing task payload privately, without exposing passwords or API keys.

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3. Start fresh and check the result

Start a new attempt after changing the endpoint. Do not reuse challenge HTML or clearance data collected through the previous route.

The AntiCloudflareTask requirements specify a static or sticky proxy, recommend at least three minutes of session time, and require consistent supported client settings. If challenge HTML is needed, retrieve it freshly through the intended sticky proxy.

Check the actual exit IP using your own server logs or a controlled IP-check endpoint. Local stability only confirms the local path. If you cannot observe the solver’s path, ask support to correlate the connection records. Finally, confirm that the intended target page loads successfully.

What if the error remains?

If the exact message remains, verify that the task actually contains the replacement host, then contact CapSolver support with the error, timestamp, task ID if available, and redacted proxy configuration.

If the host error disappears but the challenge still fails, investigate the next failure separately. Cloudflare’s challenge troubleshooting guidance also identifies network and browser issues. The Cloudflare session diagnostics guide covers broader checks.

Build Reliable Automation Workflows with CapSolver

Use a supported regional entry point, align both proxy configurations, and verify the result. CapSolver supports the challenge-solving step in authorized workflows; session duration alone cannot establish exit-IP consistency.

FAQ

Q: Is a 10-minute sticky session enough?

It exceeds the documented three-minute recommendation, but does not guarantee that separate clients share one gateway session mapping or exit IP.

Q: Can I keep the same session ID after changing the gateway?

Follow your proxy service’s session rules. Keeping the label does not guarantee the old exit remains assigned. Begin a fresh challenge attempt after changing the route.

Q: Does a regional gateway guarantee success?

No. It can address automatic regional routing, but you still need consistent exits, correct task inputs, and a successful target-page response.