Symantec Endpoint Protection 14.3 MP1 on macOS 10.15.x is producing firewall prompts for application traffic. These do not seem to be governed by any Endpoint Protection Manager policy settings.
macOS 10.15.6 and Endpoint Protection 14.3 MP1.
This issue is fixed in Symantec Endpoint Protection (SEP) 14.3 RU1. For information on how to obtain the latest build of Symantec Endpoint Protection, see Download the latest version of Symantec software here.
ESCRT-4667