V2Ray Protocol Errors with V2RayNG on Android
The JSON configuration file is malformed (missing brackets/commas, invalid fields) or the path to the file is incorrect.
Ensure that the JSON file is correctly formatted and the path to the file is correct.
Platform: Windows (V2RayN), Android (v2rayNG)
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The client cannot locate the .json or config file you specified.
Check the path or file name to ensure the config file is present.
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The handshake with the server was not completed. Possible causes include wrong certificate, SNI mismatch, server not serving TLS, or firewall interference.
Ensure correct TLS certificates and proper SNI setup on the server. Verify no firewalls are blocking the handshake.
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The client is unable to establish a TCP connection.
Check if the server is online and accessible, verify the port and DNS settings.
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The UUID or user ID in the client config does not match the server’s configuration.
Check and match the UUID in both the client’s outbound and the server’s inbound configuration.
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The WebSocket connection failed due to incorrect domain, path, or server misconfiguration.
Verify the domain’s path, hostname, and server’s WebSocket configuration.
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The client failed to connect to the server after multiple attempts.
Check server availability or verify if the client’s configuration is correct.
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The connection attempt was canceled, possibly due to manual stop, timeout, or another program forcibly closing the connection.
Ensure the connection is not being manually canceled and check for other applications causing interference.
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The remote side (server or middlebox) abruptly closed the connection.
Investigate network instability or potential ISP-level blocks.
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Another service already uses that port, or the user lacks permission to bind to the port.
Check for port conflicts and ensure sufficient permissions.
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The subscription link is malformed or improperly encoded.
Check the format of the subscription URL and ensure it is generated correctly on the server side.
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The remote server did not respond, usually due to DNS or connectivity issues.
Verify DNS settings and network connectivity.
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The domain cannot be resolved due to DNS issues.
Check DNS configurations and ensure local DNS is not blocked or misconfigured.
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The server or client is using an outdated cipher or a deprecated encryption method.
Update both client and server configurations to support more secure ciphers.
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The config references a non-existent inbound or outbound tag.
Correct the tag references or check for typos in the configuration.
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The inbound connection timed out, possibly due to an idle timeout setting or data not being sent in time.
Adjust idle-timeout settings or ensure data is sent within the allowed time frame.
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The TLS certificate does not match the domain name in use.
Ensure the certificate’s CN/SAN matches the domain and allow insecure connections if necessary.
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The certificate’s private and public keys do not match.
Ensure the correct certificate pair is used, avoiding copy-paste or mix-up errors.
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The buffer is exhausted by excessive traffic or large requests.
Optimize the configuration or reduce the volume of traffic to prevent overflow.
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A routing rule for a protocol (e.g., TCP, UDP) cannot find a matching outbound.
Define outbound settings for the specific protocol or rule in the configuration.
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On older VMess, the altered field might be required but is missing or mismatched.
Ensure the altered field matches on both client and server for older VMess configurations.
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The sniffing feature failed to detect the protocol due to an unknown or encrypted protocol.
Use a known or unencrypted protocol to avoid sniffing failures.
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Another instance of V2Ray or V2RayN is running on the same port, or the system service is stuck.
Ensure that no other instances of V2Ray are running and restart the service if necessary.
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Missing or incorrect streamSettings in the configuration.
Correctly reference or define streamSettings in both inbound and outbound sections.
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The UDP port is already in use by another application or V2Ray instance.
Close the conflicting application or reassign the port in the configuration.
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There is a mismatch between the security settings on the client and server, such as encryption methods.
Ensure that the client and server configurations are aligned in terms of security settings.
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