Choosing a route: prioritize consistent responses
When searching for the best VPN for Cursor, the real question is whether completions appear promptly, chats keep streaming, and AI tools in your terminal can make requests reliably. A stable route is one that handles these tasks during your regular development hours—not simply the one with the highest download speed on a speed test.
AI coding requests typically involve sending context, server-side processing, and returning a result. Chats may use streamed HTTP responses, and some features may rely on other persistent connections; the implementation varies by tool version. Successfully opening a website only confirms that its access path works—it does not mean requests from your editor take the same route.
Prioritize routes that: use a region supported by the tool, complete real requests consistently, perform well in the evening, and are easy to manage with split tunneling. Test with a fixed exit first, then consider automatic routing. Avoid frequent policy-driven switches while a request is generating.
Also separate network issues from account issues. Requests can fail because a model is unavailable, a usage limit has been reached, organization policies apply, or the account is not eligible in that region. A network connection does not change platform terms, account entitlements, or model access, and cannot guarantee that a platform will always allow access from a particular exit.
Direct, relayed, and dedicated routes compared
Route names describe a path or transport method, not a ranking of user experience. A nearby region may reduce path length, but peering, congestion, and the destination service's location matter too. Don't choose solely by map distance or treat a region label as proof that a model service is available there.
| Type | Route characteristics | What to test during development | What the name alone can't tell you |
|---|---|---|---|
| Direct | Your local network connects directly to an overseas proxy entry point, without an additional provider relay. | Connectivity from your local carrier to the entry point, and performance during congestion. | A shorter path does not guarantee consistently responsive connections. |
| Relayed | Traffic reaches a relay entry point first, then gets forwarded to the exit. The actual transport path depends on the deployment. | Whether the entry point is reachable, the relay segment is congested, or long responses get interrupted. | A relay is not necessarily a dedicated line, nor is it necessarily slower than a direct route. |
| IEPL dedicated line | Usually refers to transport over an international Ethernet private line, but the provider's actual use should be verified. | Which parts of the route use the dedicated line, and how the connection performs from the exit to the target service. | A dedicated line does not provide account eligibility or cover every public internet segment. |
Even if a plan labels a route as dedicated, traffic from the exit to an AI platform may still travel over the public internet. More useful questions are whether the local connection to the entry point is stable, streamed responses complete, and the connection recovers after a failure. Don't assign labels like IEPL to a node unless the route details can be verified.
Protocol and route are different things
Shadowsocks, VMess, Trojan, and VLESS are common proxy protocols; Hysteria2 and TUIC use QUIC-based transport designs. These are not the same categories as “direct, relayed, and dedicated.” A protocol can be deployed over different routes, and the same route can support different protocols.
Choose a protocol based on client support and network conditions. Networks that restrict UDP may affect QUIC-based options. VLESS's encryption and security properties depend on the actual transport and settings, including TLS. A newer protocol name doesn't automatically make it a better fit for Cursor. Check the VPNPJ dashboard and documentation for available protocols and route configurations.
Test routes with your real development workflow
Don't switch nodes and change settings at the same time. Keep your current working configuration, fix the network, exit, and test project, then repeat your normal tasks. Track whether they complete and what errors occur; there's no need to upload a private repository or context containing secrets just to compare routes.
- Check your account. Verify your tool login, model access, usage limits, and the platform's status page. If the platform itself is having issues, don't start by replacing your entire network setup.
- Test editor requests. Trigger a completion in a sample project you can share, then start a chat that streams a longer response. Check whether it can't connect at all, takes a long time to return its first response, or stops midway.
- Test the terminal separately. Make a basic request with your command-line tool and confirm that the process is using the intended proxy. A working browser doesn't mean the terminal is configured correctly.
- Test during your usual work hours. Continue using the tool when you normally code and observe longer chats and context uploads. A speed test during quiet hours won't show how the route performs under congestion.
- Test recovery and a backup route. Wait for the current request to finish before switching manually, then try again. Keep a verified backup exit, and don't let brief speed-test fluctuations trigger repeated switches.
A slow first response could be caused by network handshaking or uploads, but it could also reflect model queueing or inference time; these symptoms alone aren't enough to identify the cause. For a fair comparison, use the same model and similar context where possible, and check tool logs to see where the error occurred.
An interruption in the editor doesn't necessarily mean the server stopped processing. Check the generation status before retrying, especially for agent tasks that edit files or run commands, to avoid repeating actions.
Importing subscriptions, split tunneling, and terminal proxies
A subscription link lets a compatible client retrieve nodes and related settings; it is not an address to paste into a Cursor chat. Sign in to the VPNPJ dashboard, get your subscription as instructed, and import it into a client that supports the relevant format. Then update the configuration, choose a route, and enable the proxy. Treat the full subscription URL like an access credential—don't share it in public support screenshots or code repositories.
Windows and macOS clients often offer system proxy or TUN modes, but their capabilities depend on the client. On Linux, desktop proxy settings may not carry over to terminals, containers, or background services. iOS and Android differ in their network extensions, VPN permissions, and background behavior, so don't assume desktop setup steps work the same way on mobile.
System proxy and TUN are not interchangeable
A system proxy mainly affects apps that respect the system proxy settings. TUN typically routes traffic through a virtual network interface, with rules determining where it goes. Whether it handles DNS, IPv6, and UDP depends on the implementation and configuration. Editors, extension processes, and command-line tools may use different proxy settings, so check each one separately.
Common proxy settings for command-line programs include HTTPS_PROXY, HTTP_PROXY, and ALL_PROXY, but not every program supports the same variables or proxy types. Check the tool's documentation, use the listening address shown by your local client, and restart the relevant process after setting it. Don't copy a port from someone else's machine or overwrite an existing NO_PROXY setting without checking it.
- ✅ Make sure sign-in, model requests, and related APIs follow a consistent routing policy as documented by the tool, and check the client's connection logs.
- ✅ Preserve local development addresses and required intranet routes so requests to services on your machine don't go through a remote exit.
- ✅ Check remote development environments separately. A local proxy won't automatically cover SSH hosts, containers, or remote extension processes.
- ❌ Don't assume that routing rules for the platform's website cover every request made by the editor.
- ❌ Don't disable certificate verification while troubleshooting or paste API keys or subscription links into public logs.
Global proxy mode can be a temporary diagnostic tool. If a feature works after switching to global mode, first check for missing rules and DNS routing issues. Once you identify the problem, restore split tunneling suited to your daily workflow instead of treating global mode as the default for every development environment.
How to troubleshoot DNS issues and dropped connections
A DNS leak usually means domain lookups that should follow an expected proxy or privacy route are instead taking a different resolution path. That's not the same as checking your exit IP. A browser may use its own encrypted DNS, while an editor and terminal use the system resolver, so a successful browser test doesn't cover every process.
First check the client's DNS settings and rule-matching logs to confirm that DNS resolution follows the intended outbound policy. If IPv6 is enabled on your network, verify that this traffic is handled as expected too. Don't simply point every resolver at a public DNS address: that may change the lookup results without fixing where the traffic actually exits.
Narrow down the cause based on what you see
- Website login works, but the editor fails: Check the extension process, proxy settings, certificate errors, and rules matching the service's API domains.
- The editor works, but the terminal fails: Check whether the environment variables are available to the current process and whether the command-line tool supports that proxy type.
- Responses start, then stop: Check for network changes, device sleep, client logs, and tool-side errors; server timeouts may also be a factor.
- Only one exit fails: Keep other conditions the same and test from a region supported by the platform. Distinguish regional restrictions or exit policies from network timeouts.
When contacting support, include your operating system, client name, error text, steps to reproduce, and redacted rule-matching details. Avoid vague reports like “it's slow,” and don't submit raw logs containing source code, access tokens, or a full subscription URL.
Choosing a plan for development
Consider your entire development workflow, not just AI chats. Repository clones, dependency installs, container images, and model downloads may all use the same proxy and consume traffic. Check actual usage in your client and dashboard before choosing a tier; that's more reliable than estimating based on “time spent chatting per day.”
VPNPJ monthly plans include ¥9.9/month for 60GB, ¥18/month for 250GB, and ¥28/month for 500GB. Data resets monthly on your activation date. Mid-cycle upgrades are prorated based on the remaining days. For regular development, choose a monthly plan based on your known usage; there's no need to jump to a higher tier just for occasional large downloads.
If your usage varies, compare data packs: ¥158/300GB, ¥358/1000GB, and ¥658/3000GB. They remain valid until used and never expire. Plan data doesn't replace an AI platform's own usage limits or subscription; budget for them separately.
VPNPJ supports unlimited devices and Windows, macOS, iOS, Android, and Linux, with 120+ countries / 190+ routes. Device capacity and coverage offer flexibility, but don't guarantee access to any particular AI platform. VPNPJ requires no email address—just a username and password. Alipay, WeChat Pay, and USDT are supported, with a 14-day no-questions-asked refund policy.
Bottom line: Configure your client, split tunneling, and terminal proxy correctly, then test candidate routes with completions, longer chats, and command-line requests. Keep an exit and backup route that work during your actual working hours, then choose a plan based on real data usage. Don't decide based solely on a dedicated-line label or a single speed test.
For setup, start with the getting started guide. If you have connection issues, see the user manual. Find route and plan details on the routes page and plans page; refer to the dashboard for the exact available configuration.