Apple Mac OS X Server System Imaging and Software Update Administration For Version 10.4 or Later Bedienungsanleitung PDF herunterladen (Seite 21)

Chapter 1 About System Imaging Administration 21

Security

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

hardware (also called the Ethernet or MAC) addresses of computers that you want to

allow or deny access. A client computer’s hardware address is automatically added to

the NetBoot Filtering list when the client starts up using NetBoot and is, by default,

enabled to use NetBoot. You can specify others. See “Restricting NetBoot Clients by

Filtering Addresses” on page 49.

Network Install Images

An install image is a special boot image that boots the client long enough to install

software from the image, after which the client can boot from its own hard drive.

Just as a boot image replaces the role of a hard drive, an install image is a replacement

for an installation CD.

Like a bootable CD-ROM disc, Network Install 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, Network Install can be very useful. Network Install does not require the

insertion of a CD-ROM disk into each NetBoot client, because all startup and installation

information is delivered over the network.

While creating an install image with System Image Utility, you have the option to

automate the installation process by limiting the amount of interaction from anyone 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 Network Install disk image and must communicate

to those using these images the implications of using them. It is always wise to inform

users to back up critical data before using automatic network installations.

Software installations using Network Install can be performed using a collection of

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

For more information on preparing install images to install software over the network

see “Creating Mac OS X Install Images” on page 35.

Before You Set Up NetBoot

Before you set up a NetBoot server, review the following considerations and

requirements.

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Apple Mac OS X Server System Imaging and Software Update Administration For Version 10.4 or Later Bedienungsanleitung Seite 21