How To Fix SCLNT_HTTP427 - Unexpected error with connection to HTTP proxy (ICM_HTTP_PROXY_ERROR)

SAP Error Message - Details

• Message type: E = Error

• Message class: SCLNT_HTTP - Messages for HTTP Client for Respective Error Code

• Message number: 427

• Message text: Unexpected error with connection to HTTP proxy (ICM_HTTP_PROXY_ERROR)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SCLNT_HTTP427 - Unexpected error with connection to HTTP proxy (ICM_HTTP_PROXY_ERROR) ?

  The SAP error message SCLNT_HTTP427 indicates an unexpected error with the connection to an HTTP proxy, specifically related to the Internet Communication Manager (ICM). This error can occur in various scenarios, such as when the SAP system is trying to connect to an external service through a proxy server.
  Causes
  
  Proxy Configuration Issues: Incorrect settings in the HTTP proxy configuration can lead to connection failures.
  Network Issues: Problems with the network, such as firewalls blocking the connection or DNS resolution issues.
  Proxy Server Down: The proxy server itself may be down or experiencing issues.
  Authentication Issues: If the proxy requires authentication, and the credentials are not provided or are incorrect, this error may occur.
  Timeouts: The connection to the proxy may be timing out due to slow network conditions or high latency.
  SSL/TLS Issues: If the connection is secured (HTTPS), issues with SSL/TLS certificates can also lead to this error.
  
  Solutions
  
  
  Check Proxy Configuration:
  
  Verify the proxy settings in the SAP system. You can check the settings in transaction SICF or RZ10 for profile parameters related to HTTP proxy.
  Ensure that the proxy host and port are correctly configured.
  
  
  
  Test Network Connectivity:
  
  Use tools like ping or telnet to check if the SAP system can reach the proxy server.
  Check for any firewall rules that might be blocking the connection.
  
  
  
  Check Proxy Server Status:
  
  Ensure that the proxy server is up and running. You may need to contact your network administrator for this.
  
  
  
  Review Authentication Settings:
  
  If the proxy requires authentication, ensure that the correct credentials are provided in the SAP system.
  Check if the credentials have expired or if there are any changes in the authentication method.
  
  
  
  Increase Timeout Settings:
  
  If timeouts are suspected, consider increasing the timeout settings in the ICM configuration.
  
  
  
  SSL/TLS Configuration:
  
  If using HTTPS, ensure that the SSL/TLS certificates are valid and properly configured in the SAP system.
  Check if the root CA certificates are installed in the SAP system.
  
  
  
  Check SAP Notes:
  
  Look for any relevant SAP Notes that might address this specific error or provide patches or updates.
  
  
  
  Related Information
  
  
  Transaction Codes: 
  
  SICF: To manage HTTP services.
  RZ10: To manage profile parameters.
  SMICM: To monitor the ICM and check logs for more detailed error messages.
  
  
  
  Logs: 
  
  Check the ICM logs for more detailed error messages. You can find these logs in transaction SMICM under the "Log File" section.
  
  
  
  SAP Community: 
  
  Consider searching or posting in the SAP Community forums for additional insights or similar experiences from other users.
  
  
  
  By following these steps, you should be able to diagnose and resolve the SCLNT_HTTP427 error effectively.