First, understand how AI Tools assess your network environment
Being able to open a home page does not mean that sign-in, conversations, file uploads and API requests will all work normally. Different steps may use different domains, endpoints and connection methods, so troubleshooting should begin by identifying exactly where the failure occurs.
Exit region and IP continuity
Services typically assess access using the exit region, IP type, session history and account status. Switching regions repeatedly before and after sign-in may trigger additional verification or invalidate an existing session. A more reliable approach is to choose a region that fits the target tool, then keep the same route throughout sign-in, verification and use.
DNS resolution and request exit
The browser displays the target domain, but the system, browser or development tools may use different DNS settings. If DNS resolution goes through the local network while page requests use another exit, you may see partial loading, repeated verification prompts or unreachable API domains. Check both resolution and the actual request path.
TLS handshakes and system time
Both web and API traffic relies on encrypted connections. Clock drift, certificate inspection on corporate networks, outdated certificate chains or local security software can appear as reset connections, certificate errors, or CLI requests that resolve a domain but cannot complete.
Streaming and persistent connections
Generative tools often return content continuously, while IDE completions repeatedly send short requests. If a route changes mid-session, disconnects after sleep, or a local proxy covers only the browser and not the app, replies may stall, requests may wait indefinitely, completions may stop responding, or requests may retry repeatedly.
Compare tools and route requirements
The table below indicates route-selection directions; it does not mean that a region is always available for every account. Tool policies, account status and local network conditions can affect the result, so check the target service’s current page before use.
| Tool | Key network requirements | Best-fit route characteristics | Common considerations |
|---|---|---|---|
| ChatGPT | Regional checks, account sessions, streaming responses, file uploads | Stable exit region, continuous persistent connections, consistent resolution path | Avoid switching regions frequently after sign-in; if a page works but replies stop, check the streaming connection |
| Claude | Regional availability, sign-in verification, long-form streaming | Fixed exit, low connection fluctuation, suitable for persistent sessions | If verification prompts keep appearing, clear the old session first and re-enter on a fixed route |
| Gemini | Account region, search and generation requests, related service domains | A clearly defined target region, with related domains following the same path | If the account region does not match the current exit, available features may differ from expectations |
| Copilot | Web sessions, editor sign-in, code completion requests | Full system-proxy coverage, continuous responses to short requests | If the web app works but the editor does not, check whether the IDE reads the system proxy |
| Midjourney | Sign-in authorization, messaging connections, image loading | Keep the exit consistent before and after authorization redirects; static resources should load completely | The authorization page and app interface use different requests; partial direct connections can leave the page incomplete |
| Cursor | Account sign-in, model requests, index and code-context transfer | Application-level proxy support, with stable short and long requests | The terminal, editor main process and extension process may use different proxy settings |
Sign-up, sign-in and persistent sessions
Account actions place more emphasis on environmental continuity than ordinary browsing. The key is not trying more routes, but keeping the sign-up entry point, verification page, callback URL and post-login workspace on one clear path.
Choose the target region first
Choose a route before opening the tool, and make sure the browser has no proxy extension left over from another region. If system, browser and development-tool proxies are enabled at the same time, determine which layer ultimately takes effect to avoid duplicate forwarding.
Keep the callback flow continuous
Third-party authorization usually moves across several pages. Switching routes during the redirect, closing the client or sending a mobile app to the background can cause callback state to be lost. After sign-in returns you to the tool, check that the account has loaded correctly.
Do not switch exits frequently during a session
Long conversations, file processing and code indexing may hold a connection for an extended period. If you need to change regions, save the content in progress, end the current session, then switch routes and reload the page or app. This keeps state clearer than changing routes mid-response.
EyVPN sign-up requires no email address; a username and password are enough. This applies only to EyVPN accounts. Each AI tool sets its own account rules, so follow the current sign-in and verification steps shown by that service.
Differences between the web app and API calls
A working web app does not prove that the API environment is configured correctly. Browsers usually read the system proxy automatically, while CLIs, runtimes, containers and background jobs may ignore it completely.
For the web app, check sessions and resource integrity
- Confirm that the main page, sign-in endpoints, static resources and streaming responses all use the expected route.
- Disable conflicting browser proxy extensions so page requests and account callbacks do not use different exits.
- If the page opens but buttons do nothing, inspect failed domains and connection types in the browser developer tools.
- A private window can help rule out old cookies and cache, but it will not automatically fix system-proxy or DNS settings.
For APIs, check proxy inheritance in the running process
- Confirm whether the runtime making the request reads the system proxy, or whether proxy environment variables must be configured separately.
- Check the SDK’s connection timeout, streaming-response handling and retry logic so application errors are not mistaken for route failures.
- A container’s network environment may differ from the host. Verify resolution and the exit from inside the container that actually runs the task.
- Never commit real keys to a code repository, log or support ticket; retain only redacted error details when diagnosing.
Configuration boundaries for developer scenarios
CLIs, IDE extensions and CI may appear to work in the same project, but they can run in different processes, accounts or network environments. Verify each execution location separately instead of testing only the browser.
CLI and local scripts
First confirm that the terminal process read the correct proxy environment at startup. If environment variables are changed after the connection is established, an existing terminal, language server or background process usually will not update automatically. Reopen the terminal, then use a simple request without real keys to verify DNS resolution, the TLS handshake and streaming responses.
Some SDKs use their own network stack and may not follow operating-system settings. Check the SDK’s official proxy guidance instead of layering multiple forwarding methods. Keep retries measured: authentication errors, quota notices and parameter errors will not disappear after changing routes.
IDE and editor extensions
The editor UI, extension host, integrated terminal and remote development environment may each send requests. If web authorization succeeds but code completion stalls, confirm that the extension process can reach the model endpoint rather than checking only whether the built-in browser opened the sign-in page.
With remote development, the extension may actually run in the remote environment. Whether the proxy belongs on the local or remote side depends on which side sends the request. Use the target domain and failure stage in extension logs to decide, and remove project paths, keys and personal content before opening a ticket.
CI and automated tasks
CI usually runs in an isolated execution environment and will not inherit the EyVPN connection on a developer’s computer. If a task must access a related API, first confirm the execution environment’s network policy and terms of service, then design separate timeouts, error classification and key management for automation.
When a build task fails intermittently, do not rely on infinite retries. Record DNS, connection, authentication, server rejection and application-parameter errors separately to determine whether the issue lies in the network path, account permissions or request logic.
Common failure symptoms and causes
The same “cannot open” symptom can occur at completely different stages. Identifying the symptom is more effective than repeatedly reinstalling the client or switching routes in succession.
The home page opens, but sign-in returns to the sign-in page
Questions can be entered, but the response remains stuck waiting
The web app works, but the IDE extension cannot sign in or complete code
The CLI reports a connection timeout or certificate error
The original region still appears after changing routes
Images, attachments or code indexing fail while text conversations work
Review each AI Tool separately
Entry points, account systems and request methods differ between tools. The following section discusses only network configuration and troubleshooting boundaries; it makes no fixed promise about the availability of specific features.
ChatGPT
Focus on whether account sessions, streaming responses and file-related requests use the same exit. If sign-in works but a conversation stops midway, keep the route unchanged and distinguish between a browser session issue, an interrupted persistent response and local network sleep. API calls require a separate check of the running process’s proxy settings.
Claude
Long-form generation makes connection-continuity problems more visible. If verification prompts loop or authorization state is lost, check whether the region was changed during sign-in. Do not switch exits frequently during a long conversation; save the content and establish a new session if necessary.
Gemini
The account region, current exit and access paths to related services may jointly affect how the page behaves. If the main page is reachable but some capabilities do not load, check whether related domains are partially connecting directly and review the region or permission notice shown in the account page.
Copilot
Validate the web and editor sides separately. Editor completions are usually sent by an extension process and may not reuse browser settings. Checking the IDE proxy, extension logs and remote-development location is more useful than repeatedly signing in through the browser alone.
Midjourney
Sign-in authorization, the messaging interface and image resources may use different request paths. Keep the route continuous during authorization redirects. If the interface is blank or images fail to load, check whether static resources and messaging connections both use the expected exit.
Cursor
The app’s main process, extensions, terminal and remote environment may each use a different network path. If sign-in succeeds but model requests fail, identify the process actually sending the request. Code indexing involves sustained transfer, so wait for the current task to finish before switching routes.
Route selection and plan options
When choosing a route, start with regions supported by the target tool, then consider nearby available exits. Once sign-in, continuous output and resource loading work reliably, keep that route instead of switching frequently for a superficially lower latency.
Validate each stage of use
- Fix one exit region that meets the target tool’s requirements.
- Sign in first, then test ordinary conversations and streaming responses.
- If you need files, images or code indexing, test each function separately.
- Developers should continue testing the CLI, IDE extension and actual runtime environment.
- When an issue occurs, record the tool, route region, device platform, failed stage and exact error message before opening a ticket.