Symantec Endpoint Protection Small Business Edition (SEP SBE) agents fail to connect, activate, or update definitions.
To prevent these issues, you need to know which URLs that SEP SBE requires access to.
A proxy or content filtering appliance in your network environment is likely blocking connection the Symantec.cloud servers, or a content filtering appliance is corrupting the content.
To maintain proper functionality, SEP SBE agents require access to the following URLs over ports 80 and 443. A CSV with these URLs can be found below:
Note: If an application firewall is in use, the whitelist should extend to the IPS section, and you need to disable "Deep Packet Inspection"
Alternatively, whitelisting the following domains will help ensure proper client communications:
To learn how to test and confirm connectivity to installation and activation URLs, see Errors or failures when installing or activating agents.
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