The Altiris Administrator wants to deny access to packages for non-authenticated users.
Anonymous access for PackageShare on Package Servers is controlled with the "Package Service Settings" policy under the "Security Settings" section as seen here:
However, this does not apply to the Symantec Management Platform (SMP server).
ITMS 8.7
Product design
To disable anonymous access to packages hosted on the SMP Server and allow only authenticated users to access package share and packages, do the following:
Note: This only applies to Default Web Site and not Symantec Agent, which is dedicated to Cloud-enabled Management where authorization is based on client certificates.