V2Ray Protocol Errors with V2RayNG on Android

Problem :

The JSON configuration file is malformed (missing brackets/commas, invalid fields) or the path to the file is incorrect.

Solution :

Ensure that the JSON file is correctly formatted and the path to the file is correct.

Platform: Windows (V2RayN), Android (v2rayNG)

Problem :

The client cannot locate the .json or config file you specified.

Solution :

Check the path or file name to ensure the config file is present.

Problem :

The handshake with the server was not completed. Possible causes include wrong certificate, SNI mismatch, server not serving TLS, or firewall interference.

Solution :

Ensure correct TLS certificates and proper SNI setup on the server. Verify no firewalls are blocking the handshake.

Problem :

The client is unable to establish a TCP connection.

Solution :

Check if the server is online and accessible, verify the port and DNS settings.

Problem :

The UUID or user ID in the client config does not match the server’s configuration.

Solution :

Check and match the UUID in both the client’s outbound and the server’s inbound configuration.

Problem :

The WebSocket connection failed due to incorrect domain, path, or server misconfiguration.

Solution :

Verify the domain’s path, hostname, and server’s WebSocket configuration.

Problem :

The client failed to connect to the server after multiple attempts.

Solution :

Check server availability or verify if the client’s configuration is correct.

Problem :

The connection attempt was canceled, possibly due to manual stop, timeout, or another program forcibly closing the connection.

Solution :

Ensure the connection is not being manually canceled and check for other applications causing interference.

Problem :

The remote side (server or middlebox) abruptly closed the connection.

Solution :

Investigate network instability or potential ISP-level blocks.

Problem :

Another service already uses that port, or the user lacks permission to bind to the port.

Solution :

Check for port conflicts and ensure sufficient permissions.

Problem :

The subscription link is malformed or improperly encoded.

Solution :

Check the format of the subscription URL and ensure it is generated correctly on the server side.

Problem :

The remote server did not respond, usually due to DNS or connectivity issues.

Solution :

Verify DNS settings and network connectivity.

Problem :

The domain cannot be resolved due to DNS issues.

Solution :

Check DNS configurations and ensure local DNS is not blocked or misconfigured.

Problem :

The server or client is using an outdated cipher or a deprecated encryption method.

Solution :

Update both client and server configurations to support more secure ciphers.

Problem :

The config references a non-existent inbound or outbound tag.

Solution :

Correct the tag references or check for typos in the configuration.

Problem :

The inbound connection timed out, possibly due to an idle timeout setting or data not being sent in time.

Solution :

Adjust idle-timeout settings or ensure data is sent within the allowed time frame.

Problem :

The TLS certificate does not match the domain name in use.

Solution :

Ensure the certificate’s CN/SAN matches the domain and allow insecure connections if necessary.

Problem :

The certificate’s private and public keys do not match.

Solution :

Ensure the correct certificate pair is used, avoiding copy-paste or mix-up errors.

Problem :

The buffer is exhausted by excessive traffic or large requests.

Solution :

Optimize the configuration or reduce the volume of traffic to prevent overflow.

Problem :

A routing rule for a protocol (e.g., TCP, UDP) cannot find a matching outbound.

Solution :

Define outbound settings for the specific protocol or rule in the configuration.

Problem :

On older VMess, the altered field might be required but is missing or mismatched.

Solution :

Ensure the altered field matches on both client and server for older VMess configurations.

Problem :

The sniffing feature failed to detect the protocol due to an unknown or encrypted protocol.

Solution :

Use a known or unencrypted protocol to avoid sniffing failures.

Problem :

Another instance of V2Ray or V2RayN is running on the same port, or the system service is stuck.

Solution :

Ensure that no other instances of V2Ray are running and restart the service if necessary.

Problem :

Missing or incorrect streamSettings in the configuration.

Solution :

Correctly reference or define streamSettings in both inbound and outbound sections.

Problem :

The UDP port is already in use by another application or V2Ray instance.

Solution :

Close the conflicting application or reassign the port in the configuration.

Problem :

There is a mismatch between the security settings on the client and server, such as encryption methods.

Solution :

Ensure that the client and server configurations are aligned in terms of security settings.

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V2Ray Protocol Errors with V2RayNG on Android

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