V2Ray FAQ and Configuration Troubleshooting

V2Ray usually refers to the Project V proxy ecosystem and its related core capabilities. v2rayN is a desktop GUI client for Windows, macOS, and Linux, while v2rayNG is a GUI client for Android. The client handles subscriptions, nodes, routing, and system proxy settings; the core establishes connections and processes traffic.

Start with the protocol and client recommendations provided by your subscription provider. When you need capabilities such as VLESS, XTLS, or REALITY, Xray is usually the better choice. Choose V2Fly when an existing configuration explicitly depends on it or when you want to retain the original configuration model. Test the nodes again after switching; a successful import alone is not enough.

You cannot judge a protocol's speed by its name alone. Prefer a type already offered by the subscription and fully supported by the client core, then compare connection stability on the same network. VLESS is often paired with transport options such as TLS and REALITY, VMess has broad configuration compatibility, Trojan requires correct TLS parameters, and Shadowsocks is relatively straightforward to configure.

A subscription link usually contains a group of nodes and lets the client fetch updates from the same address. A single-node link describes only one connection configuration. For long-term use, save the subscription group and update it regularly; for temporary testing, import an individual node. Before deleting a subscription group, confirm that none of its nodes still need to be kept.

System proxy mode mainly handles apps that follow the operating system's proxy settings. It is simple to configure and works well for browsers and common desktop programs. TUN mode takes over a broader range of traffic through a virtual network interface, making it useful for apps that ignore system proxy settings, but it requires additional permissions. Start with system proxy mode to verify that a node works, then enable TUN if needed.

First, make sure the copied address is complete and has no spaces, line breaks, or Chinese punctuation at either end. Add it through the client's subscription manager rather than importing it as a single-node link. If it still fails, note the client's message and check the system time, network connection, and whether the subscription address has expired.

A successful import may only mean that the subscription address was saved; it does not necessarily mean the content was downloaded. Open the subscription group and run an update manually, then check the status bar or logs for the response. If the group is still empty, verify that you selected the correct subscription, that it contains content, and that the client recognizes the returned subscription format.

First, confirm that the current network can access the subscription address directly, then temporarily disable any problematic system proxy and try again. Check whether the subscription address has expired, and verify the system date, time, and time zone. If the client supports updating subscriptions through a proxy, enable that only when a working node is already available; otherwise, update requests may keep being routed through an unavailable node.

For most mainstream Android phones released after 2015, arm64 is usually the preferred choice because the package is smaller. Choose the universal build if you cannot confirm the processor architecture, the device is older, or the arm64 package reports an incompatibility. The two packages provide essentially the same features, so there is no need to install both.

The desktop edition uses a newer cross-platform interface and suits users who want a similar workflow across macOS, Linux, and Windows. The classic WPF edition retains familiar Windows interface patterns and navigation, making it suitable for users with established habits. Do not use both editions in the same configuration directory; export any necessary settings before switching versions.

First, make sure the client is running and that a reachable node is selected. Then verify that the system proxy switch is actually on and that its proxy port matches the client's local listening port. Some apps cache proxy settings at startup, so fully quit and reopen them. If the proxy still has no effect, check whether the app uses its own proxy configuration.

Separate the node, proxy, and DNS stages in that order. Switch to another node first, confirm that the system proxy is enabled, and then test domain resolution and direct connectivity separately. If only domain access fails, focus on the DNS settings. If every request fails, check the logs for handshake errors, connection refusals, or timeouts.

Confirm that you edited the currently enabled routing configuration rather than an unselected rule set. Save and reload the configuration, and restart the client if necessary so existing connections are rebuilt. When checking rule order, look for broader rules that may match first. Close old connections when testing so the target does not keep reusing a session created before the change.

Keep the configuration simple at first: set one clearly working DNS option and make sure the system time is correct. If domains fail to open while direct connections work, check whether DNS queries use a direct connection or proxy, whether routing rules are being matched, and whether the system cache contains stale results. Clear the cache and rebuild the connection after making changes.

TUN must create a virtual network interface, so it requires the authorization requested by the operating system. On desktop systems, follow the client's prompts to elevate permissions or install the required service. On Android, approve the VPN service request on the first connection. If it still fails, quit other networking tools that use virtual interfaces and restart the client.

Test several nodes from the same subscription first. If all of them time out, check the local network, system time, client core, and firewall before anything else. If only one node times out, switching nodes or updating the subscription is usually the right move. Test results reflect only that connection attempt, so run the tests again after changing networks.

First, correct the system date, time, and time zone. Then verify that the node address, port, SNI, and serverName correspond to the certificate. Do not routinely bypass certificate verification, as that can hide configuration errors. If multiple TLS nodes from the same subscription fail at once, check the system environment and core version first.

First, confirm that you downloaded a version compatible with the system and placed the program in a normal directory that the current account can read and write. Then check that the required runtime libraries are installed, that no older process is still running in the background, and that security policies are not blocking startup. Keeping the first error in the startup log is more useful than repeatedly launching the program.

First, exit duplicate client instances, then check whether the HTTP, SOCKS, and API listening ports in the configuration conflict with one another. If another program is using the port, stop the corresponding process or change the client to an unused local port. Afterward, make sure the port recorded in the system proxy settings is updated as well.

Find the time range when the failed operation occurred, then look for the first clear error. timeout usually points to the connection path or node status; connection refused means the destination or local port rejected the connection; certificate-related messages call for checking the time, SNI, and certificate parameters. Repeated identical messages are usually follow-on results of the same error.