To compare VPN reliability, first check whether you can connect and keep tasks running, then look at download speed. A speed-test screenshot only shows throughput at that moment; it doesn't prove a connection will hold during peak hours. This guide offers a repeatable comparison method without unverified brand rankings or treating route labels as proof of reliability.
Connection Success and Dropout Rates: Set Consistent Metrics
The connection success rate is the number of successful attempts divided by the number of valid attempts. A client icon changing color isn't enough to count as success: confirm that the intended destination is reachable and its content loads correctly. Before testing, set the same timeout, destination, and client mode for every route. Don't retry one route repeatedly while counting another route's first failure as its final result.
Dropout rates are easier to misinterpret. Some people count interrupted sessions as a share of all sessions; others measure interruptions per amount of time online. These metrics aren't interchangeable. For home use, record each session's duration, the number of unexpected interruptions, and how long tasks pause before recovering. Consider both interruptions and total observation time, rather than ranking a brief trial alongside an extended work session.
| What to track | How to record it | Common misinterpretation |
|---|---|---|
| Connection success rate | Divide successful attempts by all valid attempts, and keep the raw records | Assuming that a connected status in the client means the destination is reachable |
| Session interruptions | Record the number of interruptions, time online, and whether you switched networks manually | Counting intentional sleep or a manual disconnect as a route failure |
| Recovery behavior | Record whether the connection recovers automatically, whether you need to switch nodes, and whether tasks resume | Only checking that the connection came back, while ignoring that the app is still in an error state |
| Real-world tasks | Record video buffering, pauses in calls, failed page requests, and similar issues | Judging every app experience by peak download speed alone |
IEPL Dedicated Lines, Relayed Routes, and Direct Connections: It's About the Path
These terms mainly describe how traffic reaches an exit point; they aren't encryption protocols. A direct connection usually means the client connects straight to an overseas server. A relayed route usually reaches an entry point first, which then forwards traffic to an exit point. IEPL refers to an international Ethernet private line, which a service may use for part of a cross-border route. Check the entry point, exit point, and route coverage for the specific service; a node label alone doesn't reveal the entire path.
A dedicated line may reduce fluctuations on the public-internet segment of a cross-border route, but local access, server load, the exit network, and the destination site can still affect performance. A relay adds a forwarding step, but a better-chosen route may improve access. A direct route may look simpler, but that doesn't mean it's always faster; results vary by local carrier, location, and time of day.
| Route type | What to compare | What to verify |
|---|---|---|
| IEPL dedicated-line transport | Performance on sustained tasks during busy periods, and entry- and exit-point load | Which parts of the route use the dedicated line, and whether other segments still use the public internet |
| Relay | Entry-point reachability, forwarding quality, and the route from the exit point to the destination | A relay describes a route arrangement; it doesn't automatically mean the traffic uses a dedicated line |
| Direct connection | Reachability from the local network to the server, and differences by time of day | Changes in local carrier can affect test results |
Pay attention to what a latency reading in a speed-test panel actually measures. A probe to a node address, a request to a test site, and access to a real app may take different routes. A low probe latency doesn't mean sustained transfers are free of packet loss, nor does it guarantee that a target platform will work. When choosing a route, use the apps you rely on as the final test.
Test During Peak Hours Under Consistent Conditions
Start with your actual needs: remote meetings depend more on continuity, file transfers on sustained throughput, and web work can be affected by failed DNS lookups and retried requests. Don't run a large number of speed tests at once just to compare routes. Saturating your home upload or download capacity with the tests themselves can cause slowdowns and distort your assessment of route quality.
- Keep the test environment consistent. Use the same device, network connection, and client version. Pause bandwidth-heavy background tasks such as system updates and cloud sync, and note whether you're using rule-based routing or a global proxy.
- Check that the subscription and nodes are active. Update the subscription and check your account status and remaining data. Use a fixed node to avoid automatic selection switching routes in the background and making the results hard to interpret.
- Alternate between candidate routes. Test during your usual hours and at peak times, alternating the order of candidate routes. Don't compare results from quiet hours directly with results from busy periods.
- Test fresh connections. Disconnect, reconnect, and visit the same destination. Record whether the connection succeeds and what happens if it fails. Keep failed attempts in your records; don't report only the best result.
- Run sustained tasks. Use content, join calls, or transfer files as you normally would. Record when each task starts and ends, along with interruptions and recovery. Avoid switching nodes frequently.
- Test network changes separately. Check recovery after changing networks and after waking the device from sleep. Record these results separately so they aren't mixed up with route interruptions on a fixed network.
Your log should include at least the date, time period, network connection, client and version, node label, task, result, and any error. Keep relevant logs if a failure occurs, but redact usernames, subscription URLs, tokens, and server credentials before sharing. Subscription links can grant access to your account, so don't post them on public forums or enter them into online testing tools.
To investigate a result, repeat the same test first, then change just one variable. For example, keep the node fixed and switch networks, or keep the network fixed and switch nodes. If you change the client, protocol, node, and rules all at once, even a fix won't tell you what caused the problem.
Auto-Reconnect, Protocols, and Clients: Keep Them Separate
Auto-reconnect is a recovery mechanism, not a substitute for a reliability metric. A client that reconnects frequently while a webpage remains barely usable is not the same as a connection that stays up. Record “connection dropped,” “proxy reconnected,” and “app resumed” separately. Some meetings or remote sessions may require you to rejoin even after the network recovers.
Shadowsocks, VMess, Trojan, VLESS, Hysteria2, and TUIC may all appear in proxy subscriptions, but protocol support depends on the client and its core. A protocol name alone can't establish a reliability ranking; transport settings, server implementation, and network restrictions matter too. Hysteria2 and TUIC use QUIC-based transport and depend on UDP reachability. Don't assume they'll perform better on networks that restrict UDP.
A subscription link is a way to distribute configuration, not an installation file that works with every client. Check which subscription formats, protocols, and parameters your client supports, and follow the service's import instructions. If importing fails, check the format and compatibility first instead of assuming the route is at fault. Don't give your subscription to an unknown conversion website.
Desktop clients may route traffic through a system proxy or TUN mode, while mobile clients are also affected by system tunnel permissions and background management. A system proxy may not cover every app, and how TUN mode works depends on the routing and exclusion rules. Before testing, make sure the target app is actually using the intended route; otherwise, you may blame the route for traffic that never went through the proxy.
Problems That Look Like Disconnects: DNS, Routing Rules, and Destination Sites
If the client says it's connected but webpages won't open, the tunnel may still be up. DNS resolution failures, incorrect routing rules, restrictions on the destination site, and local network problems can all look similar. Start troubleshooting by checking the scope: are all sites failing, just one domain, or only one app?
- ✅ Check your basic internet connection. Temporarily pause the proxy and see whether your usual local websites load. If your basic connection is also having problems, check your network access and router first.
- ✅ Check the DNS path. Review the client's DNS settings and logs. A DNS leak means requests are taking an unintended route; it doesn't mean DNS is slow. Encrypted DNS in your browser may also affect what you observe.
- ✅ Check which routing rules apply. Confirm how the target domain and its related resources are routed. The main page may load while images or API requests fail because related domains match different rules.
- ✅ Compare apps and destinations. If other destinations work on the same node, check the target service's status, regional restrictions, and account restrictions. Don't declare an entire route unusable based on one site's failure.
- ✅ Check for mode conflicts. Avoid running multiple proxy or tunnel tools that try to control the network at the same time. Save your original settings before changing the configuration, then decide whether to keep the change once you've confirmed the result.
Choosing a Route: Test Your Tasks First, Then Check Account Terms
Frame your findings with the conditions attached: which route had fewer failures and recovered more smoothly on your network, at your usual times, and for the tasks you tested. If your observation period was limited, say so. Results may differ for users on other networks or with other carriers, so avoid presenting a personal test as the “most reliable” route for everyone.
How to assess routes: First rule out options that often fail to connect. Then compare interruptions and recovery during sustained tasks, and finally consider speed, data, and price. Route type can help narrow the options, and client behavior affects recovery, but your conclusion should come from real-world tests under consistent conditions.
If you're considering VPNFund, check the server locations first, then test using the method in this guide. VPNFund covers 100+ countries / 160+ routes, with no device limit. Coverage and device terms aren't performance guarantees; when using multiple devices at once, keep an eye on your local bandwidth and account data usage.
Check billing alongside your test plan. Monthly plans are ¥9.9/month for 60GB, ¥18/month for 250GB, and ¥28/month for 500GB, resetting monthly on the activation date; mid-cycle upgrades are prorated by the remaining days. Data packs are ¥158/300GB, ¥358/1000GB, and ¥658/3000GB; they don't expire and remain available until used. Speed tests use data, so there's no need to download repeatedly just to chase peak speeds.
VPNFund doesn't require an email address; you can open an account with a username and password. It follows a no-logs policy. This policy reflects its privacy stance and shouldn't be taken to mean that every aspect of using the service is risk-free. Refund policy: request a full refund for any reason within 7 days of your first payment. Before testing, check the plans and pricing page for billing and usage terms, then decide whether they suit your needs.