Sangfor VDI SSL Offload by Load balancer

lungluk1022 Lv1Posted Aug-09-2025 12:28

Hello,
I have setup a Load balancer for VDI Client Connect to VDC Cluster.
When I use SSL Offload on LB, after success auth. it cannot connect to desktop resources.
The VDI Client will show below error
------------------------------
12:25:35 Requesting for virtual desktop resource
12:25:35 Failed to obtain the virtual desktop configuration. Please try again later.|The network for resource connection timed out, or the IE proxy is enabled. Please try again later or contact the administrator if the failure occurs after several attempts.
----------------------------------

Check the LB log,will got
frontend_https/1: SSL handshake failure (error:0A000102:SSL routines::unsupported protocol)
---------------------------------

Is it now support SSL Offload for VDC?

**Try using passthrough can success connect to desktop.

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Sangfor Jojo Posted Aug-26-2025 11:24
  
Recommendations
  • Check SSL Protocols: Verify the SSL protocols configured on your Load Balancer. Ensure that TLS 1.2 is enabled, as older protocols like SSL 3.0 or TLS 1.0 may not be supported by the VDI Client.
  • Disable IE Proxy: If you are using Internet Explorer, ensure that the “Work Offline” option is disabled and that no proxy settings are interfering with the connection.
  • Test Without SSL Offload: If possible, test the connection without SSL Offload to determine if the issue is specifically related to the SSL configuration on the Load Balancer.
  • Consult Documentation: Refer to the specific documentation for your Load Balancer and VDI Client for any known issues or configuration requirements regarding SSL Offload.
  • Contact Support: If the issue persists after checking the above points, consider reaching out to Sangfor technical support at tech.support@sangfor.com for further assistance.

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