v2rayN FAQ and Troubleshooting

In the client’s subscription group, first make sure the URL has no leading or trailing spaces and that the group is enabled. Run an update and check the logs for the HTTP status, parsing errors, or certificate messages. If the URL returns a login page, error page, or regular webpage in a browser, the client cannot recognize it as subscription data. Once the URL is confirmed accessible, check whether its format is supported by the current client.

Old nodes only show that the previous update is still stored locally; they do not mean the subscription is currently working. Record the response status and failure time from the logs, then check the subscription’s validity period, system time, system proxy, and DNS. If only one group fails, edit that group and save the URL again. If all groups fail at once, check the network environment and the client’s proxy path first.

Most mainstream Android phones released after 2015 use arm64, so the arm64 package is usually the best choice and has a smaller footprint. Use the universal package if the device architecture is unknown, the device is older, or arm64 installation fails. Both packages provide essentially the same features; the difference is the range of processor architectures they include, not the subscription protocol.

Fully exit the client, grant the network extension, administrator, or virtual-interface permissions required by the platform, and start it again. If other virtual networking tools are installed, quit them first to avoid conflicts over interfaces, routing tables, or DNS. If TUN still fails, temporarily disable it and use system proxy mode to verify the node, then continue based on the interface name and permission messages in the logs.

First verify the system date, time, and time zone, then update the subscription and confirm the node has not expired. Next check whether the server address and port accept connections, whether the local firewall is blocking traffic, and whether all protocol parameters are present. Finally, disable extra routing rules and retry with a single node and system proxy. If the log stops during connection, the issue is usually network or port related; if it stops during the handshake, recheck the security-layer parameters.

First confirm that the active node was actually loaded by the running core. Then check that the system proxy is enabled and the browser is configured to use system settings. Test domains and IP addresses separately to determine whether DNS is involved. If only some sites fail, review routing matches. If every request fails, temporarily switch to global mode, disable TUN, and retry. Change only one setting at a time so the logs reveal which layer is failing.

Some apps use their own proxy settings or ignore the operating system proxy, so they may connect directly even when the system proxy is enabled. Check for a proxy option inside the app and make sure it is not explicitly set to bypass the proxy. Also verify that the system proxy address and port match the client’s current listening port. To handle traffic that ignores the system proxy, evaluate TUN mode only after ordinary connections are confirmed to work.

A port-in-use error means another process is already using the local HTTP, SOCKS, or API port the client wants to listen on. Quit duplicate client instances and other proxy tools, then reconnect. If the conflict remains, choose an unused local port in the settings and update the port in the browser or system proxy as well. Restart the core after making the change and confirm that the logs show the new listening address.