This complete VPN guide answers the questions people ask most when they first use a subscription service. The basic model is simple: the client creates an encrypted connection, the subscription link delivers route settings, the route group determines where traffic is forwarded, and split-tunneling rules decide which requests use the route. Once these roles are clear, import errors, speed changes, data usage, and DNS checks become much easier to troubleshoot.
Question 1: What actually changes after connecting to a VPN?
After the connection is established, network requests covered by the rules first enter the local client, travel through the selected protocol to a remote route node, and are then sent from that node to the target service. To the destination website, the public exit usually becomes the node’s exit rather than the exit of the network you are currently using. Depending on its mode, the client may also take over the system proxy, virtual network adapter, DNS queries, or traffic from selected apps.
The common “system proxy” mode mainly affects apps that follow the system proxy settings. A virtual network adapter can handle a broader range of traffic, but it is also more likely to conflict with security software, enterprise network policies, or other network tools. If a browser loads pages but a desktop app does not use the route, the node may be fine: the app may not use the system proxy, or a split-tunneling rule may have classified it as a direct connection.
Question 2: Can you use a VPN on multiple devices at the same time?
Start with the plan rules, then check how the client and subscription are managed. VPNRG plans support unlimited devices, but connections on different devices still use the plan’s data separately. The same subscription can be imported into supported platform clients, and the route list is updated centrally through the subscription, so you do not need to enter server details manually on every device.
Using multiple devices does not mean they all have to use the same route. A computer can use a route group suited to remote work, a tablet can use a region group suited to browsing, and other devices can stay on a direct connection. If a device is no longer in use, delete its local configuration. Do not put the full subscription link in public screenshots, shared documents, or public code repositories, because anyone with the link can usually read the associated route configuration.
- ✅ Use a client that matches each device’s operating system.
- ✅ Treat the subscription link as part of your account credentials and import it only on trusted devices.
- ✅ Update the subscription before deciding that routes are missing or have changed.
- ❌ Do not interpret “unlimited devices” to mean that data usage will not accumulate.
Question 3: How is VPN data usage calculated?
Plan data is generally measured by the amount of data sent through the service routes, not by the number of pages you open. Images, scripts, video, downloads, cloud sync, system updates, and background app traffic all count. Uploads are network traffic too, so sending attachments, backing up photos, or syncing project files remotely also uses data.
Whether direct traffic counts toward your plan depends on whether the request actually enters a service route. If split-tunneling rules send local sites, LAN resources, or selected apps directly, that traffic generally does not pass through a remote node. Conversely, global mode sends more background requests through the route, so it typically uses more data than rule-based routing.
| Usage | May use the route | What to check |
|---|---|---|
| Web browsing | Depends on domain rules | Check whether the domain matched proxy or direct routing |
| Online video | Usually involves continuous data transfer | Quality, caching, and route mode all affect usage |
| Cloud sync | Uploads and downloads may both use the route | Check whether the sync app follows the system proxy |
| System and software updates | More likely to use the route in global mode | Pause updates when unnecessary or switch to rule-based mode |
| LAN access | Should usually stay direct | Confirm that private network addresses are not routed incorrectly |
If usage rises noticeably, first review the client connection log and rule-match records, then check cloud drives, game platforms, development environment images, and system updates. Closing the browser alone does not guarantee that background transfers have stopped. When you need to control usage, rule-based mode is usually easier to trace than global mode.
Question 4: Will a VPN limit your speed, and what determines performance?
VPN speed is not controlled by a single factor. Your current network, device performance, protocol implementation, route load, node distance, cross-network quality, destination response time, and time of day can all affect the result. The latency shown in the client reflects only one probe; it cannot directly predict video throughput, download speed, or the stability of a long-lived connection.
“Throttling” and “slowness” are not the same thing. Throttling usually means that the plan or server has an explicit bandwidth cap. Slower performance may come from encryption overhead, route detours, wireless fluctuations, node congestion, or limits imposed by the destination. Without evidence of a server-side policy, one drop in download speed is not enough to prove throttling.
- First confirm that the underlying network is stable with the connection disconnected.
- Keep the same client and destination service, and compare only by switching route groups.
- Avoid running cloud sync, system updates, or large file transfers at the same time.
- Test web response, video playback, and file downloads separately; do not use one result to represent the entire experience.
- If every route performs poorly, check the client version, system proxy, and local network restrictions.
Question 5: Should a VPN stay on all the time?
Whether to keep it on depends on the situation, not on maximizing uptime. On public networks, during remote work, or when you need a consistent route environment, staying connected can reduce switching between exits. For local services, LAN devices, or latency-sensitive local apps, rule-based routing is often a better fit than leaving global mode on.
After a mobile device sleeps, changes networks, or switches from Wi-Fi to another connection, the client may rebuild the tunnel. A brief disconnection at that point does not necessarily indicate a node failure. If the client offers a feature such as “block network when disconnected,” understand its effect before enabling it: apps that are not exempted may temporarily lose network access while the tunnel reconnects.
The key to keeping a VPN on is predictable rules. Developer tools, video apps, messaging services, and browsers may need different policies. Sending every request through one node can add unnecessary detours and make troubleshooting harder. For beginners, starting with rule-based mode and considering global mode only after confirming specific needs is usually safer.
Question 6: How should you import a subscription link into a client?
A subscription link is not an ordinary web address; it is the entry point a client uses to read route configuration. The usual process is to copy the complete link, choose “Import from URL,” “Add subscription,” or a similar option in the client, paste the link, and run an update. After a successful import, routes or route groups should appear. Do not open the link in a browser and copy the contents piece by piece.
General import steps
- Copy the complete subscription link from the user panel and make sure nothing is missing from either end.
- Open a compatible client for the relevant platform and go to subscription or configuration management.
- Choose import from link and paste the link into the subscription URL field.
- Save it, run one manual update, and wait for the route group to appear.
- Select a route group and start the connection, then verify the public exit and DNS path.
If the list is empty after import, first confirm that the client supports the protocols included in the subscription. Then check whether a chat app truncated the link, whether extra spaces were added, and whether the system time is correct. If old routes remain but new ones do not appear, the client may simply be using a stale cache. Update it manually in subscription management instead of repeatedly creating subscriptions with the same name.
Subscription troubleshooting order
Copy the complete link
→ Add subscription in the client
→ Manually update configuration
→ Check the route group
→ Establish the connection
→ Verify the exit and DNS
Question 7: How do you choose between Shadowsocks, VMess, Trojan, VLESS, Hysteria2, and TUIC?
These names refer to different proxy protocols or transport designs, not speed tiers. Shadowsocks is relatively straightforward and widely supported by clients. VMess and VLESS are common in their respective ecosystems; VLESS does not use VMess’s identity and encryption design and is often paired with transport-layer security settings. Trojan uses TLS-based traffic characteristics, while its reliability depends on the certificate, domain, and server configuration.
Hysteria2 and TUIC are mainly designed for QUIC-based transport. They may recover differently from traditional TCP solutions when packets are lost or the network fluctuates, but that does not make them faster on every network. Some enterprise networks, public networks, or routers restrict UDP, in which case QUIC-based connections may fail. Switching to another route that suits the current network is more practical.
| Protocol | Key characteristics | How beginners should evaluate it |
|---|---|---|
| Shadowsocks | Mature implementation with broad client compatibility | A good starting point for validating basic connectivity and client settings |
| VMess | Common in specific proxy ecosystems | Confirm that the client core supports the relevant transport parameters |
| VLESS | Often combined with TLS and other transport settings | Do not judge by the protocol name alone; import the complete configuration |
| Trojan | Depends on TLS settings and certificate verification | Incorrect system time or domain resolution can affect the connection |
| Hysteria2 | QUIC-based and transmitted over UDP | Switch to another route when UDP is restricted |
| TUIC | Also uses a QUIC-based transport design | Pay attention to client version and network compatibility |
Question 8: What is the difference between direct routes, relays, and IEPL?
A direct route connects the device straight to the remote node. The path is simple, but cross-network fluctuations show up directly in the experience. A relay adds an entry or forwarding node between the device and the remote exit, sending traffic through a more suitable domestic segment or cross-network path. Whether a relay is faster depends on the entry quality, forwarding link, and exit load; adding another layer does not automatically improve performance.
IEPL generally refers to an international Ethernet private-line connection, emphasizing a controlled point-to-point or enterprise network path. Route labels in the market may describe a network product, an access method, or a combined architecture, so beginners should not infer the entire path from the name alone. End-to-end routing, congestion, exit quality, and the destination’s location matter more to the experience.
When choosing a route, start by selecting a route group for the region where the destination service is located, then compare stability within that group. Keep local resources on direct routing and send international services through the appropriate route according to the rules. This reduces detours and makes it easier to identify the path used by a domain in the logs.
- ✅ Direct routes suit situations where the path is stable and relatively short.
- ✅ Relays optimize forwarding paths between specific networks.
- ✅ Interpret the IEPL label together with the actual entry, exit, and service details.
- ❌ Do not infer speed or stability from a route name alone.
Question 9: What is a DNS leak, and why do split-tunneling rules matter?
DNS converts domain names into network addresses. If app traffic uses a remote route while domain lookups are still handled by the local network, the DNS path and proxy path may diverge. This is commonly called a DNS leak. It may not stop a page from loading, but it can expose lookup information about the domains you access or cause failures when the resolved address does not match the exit region.
During testing, check both the public exit and the DNS resolver. A changed exit address alone does not confirm that DNS is being forwarded as expected. The client may use system DNS, encrypted DNS, remote DNS, or split resolution by domain category. Each mode has a purpose; the important thing is that the rules match your expectations and that multiple network tools do not take over DNS at the same time.
Split-tunneling rules typically use domains, network addresses, apps, or rule sets to decide whether traffic is proxied, sent directly, or denied. In clients that match rules from top to bottom, a broad rule near the top can override a more specific rule below it. For example, if all requests are set to use the proxy, a local-resource rule can fail to preserve LAN access unless it has higher priority. After changing rules, reconnect the affected services because existing long-lived connections may not apply the new policy immediately.
Verification order for exit, DNS, and apps
- Connect to the target route and note the client’s current mode and route group.
- Check whether the public exit has changed to the expected region’s node exit.
- Check whether the DNS resolution path matches the client settings.
- Open services that require proxying and direct access separately, and review the rule-match records.
- If one app behaves unexpectedly, check whether it uses its own proxy or built-in DNS.
Question 10: If it says connected but does not work, what should you check first?
The most effective approach is to change only one variable at a time. Do not replace the client, protocol, route, and DNS simultaneously; even if the issue clears, you will not know the cause. First confirm that the subscription can update, then confirm that a route can connect, and then check the exit, DNS, and app rules. Suspect the local network, client core, or system environment first only after every route has failed.
Desktop clients can usually provide more complete connection logs, system proxy controls, and virtual network adapter settings, making them useful for locating protocol-handshake and rule-match issues. Mobile operating systems are more affected by background policies and power-saving features, and may require reconnection after a network change. Button labels vary by platform, but the troubleshooting logic is the same: is the configuration valid, is the tunnel established, is traffic entering it, and is resolution correct?
- ✅ Manually update the subscription to confirm that the route list is not an old cache.
- ✅ Switch to another route in the same region group to distinguish a single-node issue from a broader problem.
- ✅ Check the device system time; TLS-related connections depend on accurate time.
- ✅ Pause other proxies, virtual network adapters, or network-filtering tools before testing again.
- ✅ Review resolution, handshake, timeout, and rule-match details in the client log.
- ❌ Do not bulk-delete rules and subscriptions before saving the original configuration.
If the browser works but other apps do not, check whether those apps ignore the system proxy. If every app connects but domain access fails, focus on DNS. If only one region group fails, switch routes and update the subscription. If it works on one network but not another, consider UDP restrictions, enterprise network policies, or the quality of the access network.
For everyday use, keep one client configuration that you have already verified and avoid frequently changing low-level settings. After a subscription update, check how the route groups changed, then choose a node based on your region and use case. When something goes wrong, record the system, client, route group, connection mode, and log symptoms. Clear environment details are easier to diagnose than “it won’t connect” and help avoid irrelevant trial and error.