When you try to open a Live Shell connection to an agent that is behind a user-based proxy the connection fails. This occurs even if a proxy is defined in the Symantec Endpoint Security (SES) System policy.
SES Complete
The Live Shell connection is handed off to a Windows program running as SYSTEM, which does not have access to the user-based proxy configuration or the SES policies.
Workaround:
A. Use the Compliance (Host Integrity) policy to adjust the SYSTEM proxy settings in the registry before opening Live Shell. (This method requires knowledge of manipulating binary data in the Windows registry.)
or
B. Use your preferred method to execute the "netsh" command remotely and set the SYSTEM proxy settings on the endpoint.
Example netsh command:
netsh winhttp set proxy <SERVER>:<PORT>