How To Fix SCLNT_HTTP408 - SSL proxy error (ICM_HTTP_SSL_PROXY_ERROR)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 408

• Message text: SSL proxy error (ICM_HTTP_SSL_PROXY_ERROR)

What causes this issue?

An error occurred during the proxy handshake.

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?

Check the ICM trace file.

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_HTTP408 - SSL proxy error (ICM_HTTP_SSL_PROXY_ERROR) ?

  The SAP error message SCLNT_HTTP408 SSL proxy error (ICM_HTTP_SSL_PROXY_ERROR) typically indicates that there is an issue with the SSL connection when the SAP system is trying to communicate with an external service through a proxy. This error can occur due to various reasons, including misconfiguration of the SSL settings, issues with the proxy server, or network connectivity problems.
  Causes:
  
  Proxy Configuration Issues: The proxy settings in the SAP system may not be correctly configured, leading to SSL handshake failures.
  SSL Certificate Problems: The SSL certificate used by the proxy server may be invalid, expired, or not trusted by the SAP system.
  Network Issues: There may be network connectivity problems between the SAP system and the proxy server or the target service.
  Firewall Restrictions: Firewalls may be blocking the SSL traffic to or from the proxy server.
  Incorrect URL: The URL being accessed may be incorrect or not reachable.
  
  Solutions:
  
  
  Check Proxy Configuration:
  
  Verify the proxy settings in the SAP system (transaction code SICF for ICM settings).
  Ensure that the correct proxy host and port are configured.
  
  
  
  Validate SSL Certificates:
  
  Check if the SSL certificate of the proxy server is valid and trusted by the SAP system.
  If necessary, import the proxy server's SSL certificate into the SAP system's trust store.
  
  
  
  Network Connectivity:
  
  Test the network connection to the proxy server using tools like ping or telnet.
  Ensure that the SAP system can reach the proxy server and the target service.
  
  
  
  Firewall Configuration:
  
  Review firewall rules to ensure that SSL traffic (typically on port 443) is allowed to and from the proxy server.
  
  
  
  Check URL:
  
  Verify that the URL being accessed is correct and reachable.
  Test the URL in a web browser to see if it is accessible.
  
  
  
  Review ICM Logs:
  
  Check the ICM logs for more detailed error messages that can provide additional context about the issue. The logs can be found in the transaction SMICM.
  
  
  
  Update SAP Kernel:
  
  Ensure that the SAP kernel is up to date, as older versions may have bugs or compatibility issues with SSL.
  
  
  
  Related Information:
  
  ICM Configuration: The Internet Communication Manager (ICM) is responsible for handling HTTP and HTTPS requests in SAP. Proper configuration is crucial for SSL connections.
  SSL/TLS Protocols: Ensure that the correct SSL/TLS protocols are enabled in the SAP system and the proxy server.
  SAP Notes: Check for relevant SAP Notes that may address specific issues related to SSL proxy errors. You can search the SAP Support Portal for updates or patches.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed logs and error messages for better diagnosis.