Hi, does anyone have good Altiris security setup documentation?
Sure, have a look at the SMP 7.1 SP2 User Guide, chapter 4, "Configuring security".
You can find the SMP 7.1 SP2 User Guide here: http://www.symantec.com/docs/DOC4730
You can also have a look at the same topics online. Here is a good starting point: http://www.symantec.com/docs/HOWTO62791