System information

133Chapter 9 Customizing Services
A computer with Mac OS X v10.6 Snow Leopard can have its iChat application
automatically set up to use your server’s iChat service. See “Setting Up Users’ Macs
Automatically” on page 105.
iChat service also works with the iChat application in earlier Mac OS X versions, Google
Talk, and other instant messaging software that uses the XMPP protocol, called Jabber,
which is available for Windows and Linux computers.
If you want to allow access to iChat service on the Internet and you have a cable router,
DSL router, or other network router, your router must have port forwarding (port
mapping) congured for iChat service. For more information, see “Protecting a Small
Network” on page 35.
If you want to allow access to iChat service outside your local network and your
local network has a separate rewall device, ask the rewall administrator to open
the rewall for the ports that iChat service uses. For a list of ports, see “Services and
Ports” on page 175.