Symantec Endpoint Protection (SEP) for Mac does not update definitions when a proxy is in use. The SEP clients fail to authenticate or are unable to connect to Symantec LiveUpdate servers.
Proxy settings may not be configured correctly. SEP 14.2 unmanaged Mac clients do not correctly use macOS system proxy settings. This is a known issue addressed in SEP 14.2 RU1.
Follow these steps if updating to SEP 14.2 RU1 is not possible:
Note: NTLM authentication is supported in SEP 12.1.x for Mac, and in SEP 14.2 RU1 and newer. If you configure proxy username and password at the SEPM, specify the username in DOMAIN\username or [email protected] format for NTLM authentication.
Proxy support for Symantec Endpoint Protection client for Mac 12.1.4 and later
Proxies and compatibility with Java LiveUpdate and Symantec Endpoint Protection (for older SAV/SEP for Mac products)