Package Server: IIS must be installed on the Package Server in order to use it for the initial Symantec Management Agent push installation. HTTP/HTTPS code base are needed to use a package server during the intial Symantec Management Agent push.
Site Server Settings: Make sure that the subnets which contain the Site Servers for a site are added to the Subnets list associated with a site. Also the client subnet should be part of a defined site.
Push Symantec Management Agent: On Settings check the flag "Use Closest Package Server" on Symantec Management Agent push to use the Package Server source to intall the Altiris Agent.
Regards,