Apple Mac OS X Server (version 10.2.3 or later) - Manual (Page 29)

Administering Your Server 29
You will use DNS if you use SMTP mail service or if you want to create subdomains within
your primary domain. You will also use DNS if you are hosting multiple Web sites. If you don’t
have an Internet service provider (ISP) who handles DNS for your network, you can set up a
DNS server on your Mac OS X Server.
You’ll find more information about DNS in Chapter 14, “DNS Service.”
IP Firewall
IP firewall service protects your server and the content you store on it from intruders. It
provides a software firewall, scanning incoming IP packets and accepting or rejecting them
based on filters you define.
You can set up server-wide restrictions for packets from specific IP addresses. You can also
restrict access to individual services—such as Web, mail, and FTP—by defining filters for the
ports used by the services.
See Chapter 15, “Firewall Service,” for more information about this service.
SLP DA
Service Location Protocol (SLP) provides structure to the services available on a network and
gives users easy access to them.
Anything that can be addressed using a URL can be a network service—for example, file
servers and WebDAV servers. When a service is added to your network, the service uses SLP
to register itself on the network; you don’t need to configure it manually. When a client
computer needs to locate a network service, it uses SLP to look for services of that type. All
registered services that match the client computer’s request are displayed for the user, who
then can choose which one to use.
SLP Directory Agent (DA) is an improvement on basic SLP, providing a centralized repository
for registered network services. You can set up a DA to keep track of services for one or more
scopes (groups of services). When a client computer looks for network services, the DA for
the scope in which the client computer is connected responds with a list of available network
services. Because a client computer only needs to look locally for services, network traffic is
kept to a minimum and users can connect to network services more quickly.
See Chapter 16, “SLP DA Service,” for information about this service.
QuickTime Streaming Service
QuickTime Streaming Server (QTSS) lets you stream multimedia in real time using the
industry-standard RTSP/RTP protocols. QTSS supports MPEG-4, MP3, and QuickTime file
formats.
LL0395.Book Page 29 Wednesday, November 20, 2002 11:44 AM