How To Fix SRT_WSP2181 - Reverse Proxy "&1" has an invalid incoming ICM Port "&2"

SAP Error Message - Details

• Message type: E = Error

• Message class: SRT_WSP2 - Messages for SRT WSP

• Message number: 181

• Message text: Reverse Proxy "&1" has an invalid incoming ICM Port "&2"

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SRT_WSP2181 - Reverse Proxy "&1" has an invalid incoming ICM Port "&2" ?

  The SAP error message SRT_WSP2181 indicates that there is an issue with the configuration of the reverse proxy in relation to the Internet Communication Manager (ICM) port. This error typically arises when the reverse proxy is trying to communicate with the SAP system, but the specified ICM port is either invalid or not properly configured.
  Cause:
  
  Incorrect ICM Port Configuration: The ICM port specified in the reverse proxy configuration does not match any of the active ICM ports in the SAP system.
  ICM Not Running: The ICM service may not be running on the specified port.
  Firewall Issues: A firewall may be blocking access to the specified ICM port.
  Network Issues: There may be network connectivity issues between the reverse proxy and the SAP system.
  Configuration Errors: There may be typos or misconfigurations in the reverse proxy settings.
  
  Solution:
  
  
  Verify ICM Configuration:
  
  Check the ICM configuration in the SAP system. You can do this by using transaction RZ10 or RZ11 to view the parameters related to ICM.
  Ensure that the ICM port specified in the reverse proxy configuration matches the port configured in the SAP system.
  
  
  
  Check ICM Status:
  
  Use transaction SMICM to check if the ICM is running and listening on the expected port. You can also check the logs for any errors.
  
  
  
  Firewall Settings:
  
  Ensure that there are no firewall rules blocking access to the ICM port. You may need to work with your network/security team to verify this.
  
  
  
  Network Connectivity:
  
  Test the network connectivity between the reverse proxy and the SAP system. You can use tools like ping or telnet to check if the port is reachable.
  
  
  
  Review Reverse Proxy Configuration:
  
  Double-check the configuration of the reverse proxy to ensure that the correct ICM port is specified. Look for any typos or incorrect settings.
  
  
  
  Restart Services:
  
  If changes are made to the configuration, restart the ICM and the reverse proxy services to apply the changes.
  
  
  
  Related Information:
  
  ICM Ports: The ICM (Internet Communication Manager) is responsible for handling HTTP and HTTPS requests in SAP systems. It can be configured to listen on multiple ports.
  Reverse Proxy: A reverse proxy acts as an intermediary for requests from clients seeking resources from servers that provide those resources. It can help with load balancing, SSL termination, and security.
  SAP Notes: Check SAP Notes related to SRT_WSP2181 for any specific patches or updates that may address known issues.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance, providing them with detailed logs and configuration settings for better diagnosis.