Hi,
Please check with these..
http://www.symantec.com/business/support/index?page=content&id=HOWTO10323
http://www.symantec.com/business/support/index?page=content&id=HOWTO3401
Altiris clients port requirement.
https://www-secure.symantec.com/connect/forums/altiris-client-port-requirements