NETWORK CONDITIONS
AI tool network requirements
Region detection and exit IP
AI services may determine access eligibility using your exit IP, account details, billing region and product availability. A route labeled with a region can help guide your choice, but it does not replace the service’s official list of supported regions. Before connecting, check availability for the web product and API separately. Different products from the same provider may follow different rules.
The service may also assess the risk associated with an exit IP. If you see an extra verification step or access restriction, don’t assume the route is at fault based on a single error, and avoid repeatedly switching regions. Save the message, check your account status and service announcements, then test the connection from a region that meets the service’s official requirements. Network acceleration can’t change account eligibility or replace a subscription to the tool itself.
Persistent connections and streaming
Chat tools often deliver responses in chunks. A page loading smoothly only confirms that the initial request succeeded; longer generations also depend on the client proxy, local network and server-side connection handling. A response that stops mid-sentence, keeps loading or fails to process an attachment needs troubleshooting along that path—not just a check that the route says “connected.”
Keep the same exit route during use, and avoid switching routes mid-generation or letting your device go to sleep. If short prompts complete but long responses often cut off, check for process timeouts, proxy idle-connection cleanup or network changes. IEPL, transit and direct connections describe link types; they don’t guarantee that an AI tool will work. Test the specific request to find out.
Tool and route requirements
Use these points as a troubleshooting guide, not a list of guaranteed availability. Check each tool’s current official guidance for product regions, account permissions and model access.
| Tool | Route requirements | Before you start | Common checks |
|---|---|---|---|
| ChatGPT | A route in a supported product region that keeps the same exit throughout the session | Check region availability and permissions separately for web and API | Test sign-in redirects, interrupted responses and failed uploads separately |
| Claude | A route that meets official region requirements and supports sustained transfers | Account eligibility, browser session and API authentication | Distinguish region messages, usage limits and streaming interruptions |
| Gemini | A consistent exit route within the product’s supported regions | Google account requirements and the requirements for the API product in use | Check the web entry point, account permissions and developer project separately |
| Copilot | A route that covers authentication and request paths for the product in use | First identify whether you mean Microsoft Copilot or GitHub Copilot | Signing in to an IDE extension doesn’t confirm that completion requests are connected |
| Midjourney | A route that meets platform requirements and supports task submission and asset transfers | Account and subscription permissions for the entry point in use | Distinguish queue delays, task errors and failed image loads |
| Cursor | A route the editor process can use and that supports ongoing responses | Client authentication, model permissions and proxy inheritance | Chat, completions and terminal requests may use different paths |
For ChatGPT and Claude conversations, test sign-in, message submission and receipt of the complete response. For Gemini, first determine whether you’re using the web product or developer API; web access does not mean your project has API access. If you use images or attachments, test upload and download separately.
Copilot can refer to two different products: Microsoft Copilot and GitHub Copilot have different accounts, entry points and use cases. Identify the one you’re using before troubleshooting. Midjourney task submission, queue processing and result image loading are also separate steps. Cursor combines an editor with model requests; being able to sign in through a browser only confirms that the authentication page is reachable, not that the editor’s background requests use the proxy.
Keep the exit route consistent during sign-in
Before using a tool for the first time, review its region and account requirements, then choose a route that meets them. Allow necessary cookies, redirects and site storage in your browser, then sign in normally. Don’t keep refreshing while the verification page is still loading or open multiple duplicate sign-in windows at once; that can make an otherwise diagnosable session issue harder to trace.
If you return to the sign-in page after successfully logging in, check whether your browser is blocking necessary site data, a privacy extension is intercepting authentication requests, or your system clock is incorrect. You can compare results in a separate browser profile, but don’t make clearing all browsing data your default step—you could lose other active sessions.
Your 2BVPN account and AI tool accounts are separate. 2BVPN requires no email address; create an account with a username and password. Third-party tools may have different requirements. Follow each platform’s rules for eligibility, content policies, identity checks and payment verification. If a message says your account is restricted, contact the platform through its official support channel rather than trying to change your account status by switching routes.
Test web access and API connectivity separately
Web app: test the complete workflow
Start by opening the web app, then sign in, send a short prompt, receive the full response and try any attachments or image features you need. Some homepage assets may already be cached, so later requests can still fail even when the page looks fine. Note exactly which action fails instead of describing the issue as “the tool won’t open.”
Browser developer tools can help identify failed requests, but remove cookies, authentication details and conversation content before exporting logs. When sharing a screenshot, include the error name and time only; don’t expose full request headers.
API: check the project and access permissions
For API access, check the endpoint, key permissions, project configuration, model access, billing and quota separately. A paid web plan doesn’t mean API access is enabled. Treat authentication failures, usage limits and network timeouts as different issues. Start with a minimal request, then add streaming, attachments or tool calls to identify which feature introduces the problem.
Store keys only in controlled environment variables or a secrets manager—not in webpage source, public repositories or logs. When a call fails, check the provider’s error guidance and avoid repeatedly retrying authentication or permission errors.
Proxy paths in development environments
CLI: environment variables don’t guarantee the proxy is active
Terminal programs may read HTTP_PROXY, HTTPS_PROXY or ALL_PROXY, but support varies across runtimes, SDKs and transport libraries. Check the tool’s official configuration, then get the actual listening address and protocol from your local client. Don’t copy someone else’s port. After setting the variables, test a request in the same terminal process; programs launched from an older window may still have the previous environment.
NO_PROXY specifies destinations that should bypass the proxy. A pattern that’s too broad may send API requests directly; one that’s too narrow can affect local services. Check uppercase and lowercase variables, system proxy settings and app-specific configuration to avoid requests looping through multiple proxy layers. If you encounter a certificate error, fix the trust chain, system clock or proxy configuration—don’t hide the problem by disabling certificate verification.
IDE extensions: check the browser, extension and terminal separately
An IDE’s embedded browser, extension host and integrated terminal may not inherit the same proxy settings. After changing environment variables, fully quit and restart the editor if needed, then test sign-in callbacks, chat and code completion separately. Remote development, containers and subsystems add another layer: requests may originate remotely, so your local client’s connection status doesn’t represent the remote network.
When using Cursor or GitHub Copilot, note the error category reported by the app or extension, and check whether your account has permission for the feature. Don’t skip connection checks in the editor just because you can open the tool’s website in a browser. Before uploading code, also check the workspace scope and your organization’s data-use policies.
CI: configure the network where the runner executes
CI jobs run on a runner and don’t automatically use your computer’s proxy. Check the runner’s network exit, service region and organizational policies, then configure a supported connection method for its runtime. Inject secrets through protected CI variables, disable debug output that might reveal credentials, and avoid writing the full environment variable list to build logs.
For automated calls, distinguish connection timeouts, read timeouts, service rate limits and task failures. Use the backoff approach recommended by the provider for retryable errors; stop and fix the configuration for authentication or permission errors. Logging the failed stage and a redacted error category makes issues easier to reproduce than repeatedly switching routes.
2BVPN provides network connectivity, not AI model accounts, API keys or third-party usage credits. Route plans and AI tool charges are separate.
Common failure symptoms and causes
The page loads. Why does sending a message leave it waiting?
The entry page and generation request may use different domains or connections. Check for service outage notices, then confirm that the generation request uses the expected proxy. Compare with a short text prompt; if only long responses get interrupted, check read timeouts, device sleep and network changes. Don’t mistake a busy server for a region issue.
Why am I seeing a region message or repeated verification?
This may involve exit IP region detection, account details, service availability or the platform’s risk checks. Keep the same exit route for the session, check the product’s official region requirements and save the message. Route region and account eligibility are separate factors; switching routes can’t guarantee that account-level restrictions will go away.
Web chat works. Why does the API return an error?
Check API authentication, project settings, model permissions, billing and quota first, then check the network. A web subscription doesn’t automatically include API access. Keep a redacted copy of the error response and use the official documentation to distinguish authentication failures, insufficient permissions, invalid request parameters and connection timeouts before deciding whether to change routes.
The editor signs in, but chat and code completion fail. What should I do?
Authentication may happen in a browser, while model requests are sent by the extension host or a remote process. Check where the process runs and whether it inherits the proxy, then restart the relevant processes and test each feature separately. If your account lacks access to the model, fix the permissions rather than repeatedly changing network settings.
Text chat works, but images or attachments fail. What should I check first?
Check whether the file type, size and product permissions meet the tool’s requirements, then identify whether upload, task processing or result download failed. Assets may use separate storage or delivery paths, so make sure your proxy rules cover those requests. Before sharing diagnostic information, remove file contents and URLs containing access credentials.
Choose a route for your actual workflow
Start with the regions supported by your tool, then compare IEPL, transit and direct routes within the same region. Don’t assume one connection type works best for every tool. Keep the account and client configuration fixed, and test sign-in, complete responses and any required asset transfers using the same steps. Change one variable at a time; once you find a route that works for your workflow, keep your usual exit consistent.
If you mainly use text chat, track your actual usage before choosing a monthly plan. If you often upload assets, download generated results or sync development dependencies, factor those activities in too. Monthly plans are ¥9.9/month for 60GB, ¥18/month for 250GB and ¥28/month for 500GB. Data resets monthly on the activation date; mid-cycle upgrades are prorated by the remaining days.
If your usage varies, compare the one-time data packs, which remain valid until used: ¥158/300GB, ¥358/1000GB and ¥658/3000GB. Don’t estimate data use from the number of conversations alone, and don’t confuse plan data with model usage credits. See the plans page for all options and billing details.
2BVPN supports Windows / macOS / iOS / Android / Linux, with unlimited devices online at the same time. Use the same subscription on your laptop and mobile devices. Sign in to get a subscription; on all platforms except iOS, signing in also gives you access to the client. The iOS download link requires an active plan. Payments are supported via Alipay / WeChat Pay / USDT, with a 60-day money-back guarantee. Anonymous, no-logs operation is a service policy; keep your account credentials and development keys secure.