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ERR_CONN_REJECTED
Incoming Connection is rejected by the IP address validation
Allen-Bradley · MicroLogix 1400 Programmable Controllers
¿Qué significa ERR_CONN_REJECTED ?
An incoming Modbus TCP connection attempt was rejected because its source IP address did not pass the controller's configured IP address validation rules. This is a security feature to control access.
Causas comunes
- The source IP address of the client is not in the allowed list configured on the Modbus TCP server.
- IP address validation is enabled and the client's IP is explicitly denied or not whitelisted.
Pasos de reparación & Lista de verificación
Haga clic en los pasos para seguir su progreso.
- 1
Review the Modbus TCP server's IP address validation settings in the controller configuration.
- 2
Add the client's IP address to the allowed list if it is a legitimate connection.
- 3
Temporarily disable IP address validation if it's not required for security, but exercise caution.
Datos técnicos verificados. Última actualización: March 2026
Fallas relacionadas
Fuente: Allen-Bradley MicroLogix 1400 Programmable Controllers