How To Fix SCLNT_HTTP412 - Connection refused by proxy server (ICM_HTTP_PROXY_CONN_REFUSED)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 412

• Message text: Connection refused by proxy server (ICM_HTTP_PROXY_CONN_REFUSED)

What causes this issue?

The proxy server has rejected the connection.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Ensure that the proxy server is reachable at the specified port number.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SCLNT_HTTP412 - Connection refused by proxy server (ICM_HTTP_PROXY_CONN_REFUSED) ?

  The SAP error message SCLNT_HTTP412 Connection refused by proxy server (ICM_HTTP_PROXY_CONN_REFUSED) indicates that the SAP system is attempting to connect to a proxy server, but the connection is being refused. This can happen for several reasons, and understanding the cause is essential for troubleshooting and resolving the issue.
  Causes
  
  
  Proxy Server Configuration: The proxy server may not be configured correctly, or it may not be running. If the proxy server is down or misconfigured, the SAP system will not be able to establish a connection.
  
  
  Network Issues: There may be network connectivity issues between the SAP system and the proxy server. This could be due to firewall settings, routing problems, or other network-related issues.
  
  
  Incorrect Proxy Settings: The proxy settings in the SAP system may be incorrect. This includes the proxy server address, port number, or authentication credentials.
  
  
  Access Restrictions: The proxy server may have access restrictions in place that prevent the SAP system from connecting. This could be due to IP whitelisting or other security measures.
  
  
  Resource Limitations: The proxy server may be overloaded or have reached its connection limit, causing it to refuse new connections.
  
  
  Solutions
  
  
  Check Proxy Server Status: Ensure that the proxy server is up and running. You can do this by trying to access the proxy server directly from a web browser or using command-line tools like ping or telnet.
  
  
  Verify Proxy Configuration: Review the proxy server configuration to ensure it is set up correctly. Check the address, port, and any authentication settings.
  
  
  Review SAP Proxy Settings: In the SAP system, check the transaction code SICF (Internet Communication Framework) to verify the proxy settings. Ensure that the settings match those required by the proxy server.
  
  
  Network Troubleshooting: Use network diagnostic tools to check for connectivity issues. This may include checking firewall rules, routing tables, and ensuring that the necessary ports are open.
  
  
  Check Access Control: If the proxy server has access control lists (ACLs), ensure that the IP address of the SAP system is allowed to connect.
  
  
  Monitor Proxy Server Load: If the proxy server is overloaded, consider increasing its resources or load balancing the traffic across multiple proxy servers.
  
  
  Consult Logs: Check the logs on both the SAP system and the proxy server for any additional error messages or clues that can help diagnose the issue.
  
  
  Related Information
  
  SAP Notes: Check SAP Notes related to ICM (Internet Communication Manager) and proxy settings for any known issues or patches.
  Documentation: Review the SAP documentation for configuring HTTP connections and proxy settings.
  Support: If the issue persists, consider reaching out to SAP support for further assistance, providing them with detailed logs and configuration settings.
  
  By following these steps, you should be able to identify the cause of the connection refusal and implement the appropriate solution.