How To Fix GW721 - SNC deactivated, request rejected

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 721

• Message text: SNC deactivated, request rejected

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 GW721 - SNC deactivated, request rejected ?

  The SAP error message "GW721 SNC deactivated, request rejected" typically indicates that the Secure Network Communications (SNC) is not enabled or configured properly for the SAP Gateway. This can occur in environments where secure communication is required, such as when using SNC for authentication and encryption.
  Cause:
  
  SNC Not Configured: The SNC is not configured in the SAP system or the specific client.
  SNC Deactivation: The SNC is deactivated in the SAP Gateway settings.
  Missing or Incorrect SNC Parameters: The necessary SNC parameters (like snc/enable, snc/identity/as, etc.) are not set correctly in the system profile.
  Client-Side Configuration: The client trying to connect to the SAP system may not have SNC enabled or configured properly.
  Network Issues: There may be network issues preventing the establishment of a secure connection.
  
  Solution:
  
  
  Check SNC Configuration:
  
  Ensure that SNC is properly configured in the SAP system. You can check this in transaction RZ10 (Profile Parameters) and look for parameters related to SNC.
  Make sure that the parameter snc/enable is set to 1 to enable SNC.
  
  
  
  Verify SNC Identity:
  
  Check the SNC identity settings in the profile. The parameter snc/identity/as should be set correctly to match the SNC identity of the system.
  
  
  
  Client Configuration:
  
  Ensure that the client application (like SAP GUI) is configured to use SNC. This can usually be done in the connection settings of the SAP GUI.
  Make sure that the client has the necessary SNC libraries installed and configured.
  
  
  
  Check for Network Issues:
  
  Verify that there are no network issues preventing the connection. This includes checking firewalls, VPNs, or any other network configurations that might block the secure connection.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for detailed steps on configuring SNC. This can provide insights into any additional parameters or settings that may be required.
  
  
  
  Restart Services:
  
  After making changes to the configuration, restart the relevant SAP services to ensure that the changes take effect.
  
  
  
  Related Information:
  
  SNC Libraries: Ensure that the appropriate SNC libraries (like SAP Cryptographic Library) are installed on both the server and client sides.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues or provide patches related to SNC.
  Security Policies: Review your organization's security policies to ensure compliance with SNC usage and configurations.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.