Apple 95014-2084 Uživatelský manuál stáhnout pdf (Strana 23)

Chapter 1 Understanding System Imaging 23

Security

You can restrict access to NetBoot service on a case-by-case basis by listing the

hardware addresses (also known as the Ethernet or MAC addresses) of computers that

you want to permit or deny access to.

The hardware address of a client computer is added to the NetBoot Filtering list when

the client starts up using NetBoot and is, by default, enabled to use NetBoot service.

You can specify other services. See “Restricting NetBoot Clients by Filtering Addresses”

on page 55.

NetInstall Images

A NetInstall image is an image that starts up the client computer long enough to install

software from the image. The client can then start up from its own hard drive. Just as a

NetBoot image replaces the role of a hard drive, a NetInstall image is a replacement for

an installation DVD.

Like a bootable CD, NetInstall is a convenient way to reinstall the operating system,

applications, or other software onto the local hard drive. For system administrators

deploying large numbers of computers with the same version of Mac OS X, NetInstall

can be very useful. NetInstall does not require the insertion of a CD into each NetBoot

client because startup and installation information is delivered over the network.

When you create a NetInstall image with System Image Utility, you can automate the

installation process by limiting interaction at the client computer.

Because an automatic network installation can be configured to erase the contents of

the local hard drive before installation, data loss can occur. You must control access to

this type of NetInstall image and must communicate the implications of using them to

those using these images. Before using automatic network installations, it is always

wise to inform users to back up critical data.

You can perform software installations using NetInstall using a collection of packages

or an entire disk image (depending on the source used to create the image).

For more information about preparing NetInstall images to install software over the

network, see “Creating NetInstall Images” on page 29.

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Apple 95014-2084 Uživatelský manuál Strana 23