User Guide

19
Mail service
You can enable or disable mail service. If you enable it, you can also set additional options:
 Relay outgoing mail through: Some Internet service providers or organizations require routing all
outgoing mail through a relay server. If this applies to your network, you need to specify the relay
server’s DNS name. Use a relay server only if your ISP or organization requires one. Trying to relay
mail through another server without permission may make your server appear to be a mail service
abuser.
 Send a welcome email to new users: Choose whether to send an email telling new users about its
services. The standard message specifies the server’s DNS name and the recipient’s email address,
and it explains the services that the server provides. The standard message also includes links to
available file sharing and web services.
 Custom introduction: Optionally enter a custom introduction to the standard message that the
server generates. Example: Hi, I’m the administrator for our server, myserver.example.com. If
you need help getting services from it, please don’t hesitate to send me an email or call me at
310-555-4357. —Bill
The server sends the welcome email automatically when you add a new user account. However,
your server doesn’t send the email if its mail service is stopped when you add new user accounts.
Users receive the welcome email when they start using their email accounts. They see the server
administrator’s name (see “Administrator account” on page 17) and your custom introduction in a
boxed section set apart from the standard message text.
For information about mail service, see Chapter 8, “Customizing Services,” in Getting Started.
Remote access
You can enable or disable remote access service, which creates a virtual private network (VPN) to give
users secure access to the server’s network from home or other remote locations over the Internet. If
you don’t have remote users or you aren’t sure if you want to allow remote access, you can disable
this service during setup and turn it on later using Server Preferences.
VPN uses the L2TP protocol with a shared secret to ensure confidentiality, authentication, and
communications integrity. A secure shared secret is generated automatically. The shared secret is not
used to authenticate client computer users for a VPN connection. Rather, it allows the server to trust
client computers that have the shared secret, and it allows client computers to trust the server that
has the shared secret.
Both server and client computers must have the shared secret. When client computers with Mac OS X
v10.5 Leopard join the server, they automatically get the shared secret and are configured so they can
make connections to the server’s VPN service. Other Mac and Windows clients can also be configured
in different ways to connect to the VPN service.
For information about VPN service, see Chapter 8, “Customizing Services,” in Getting Started.
Gateway setup
(Skip these settings if your server has only one Ethernet port.)
If your server has more than one Ethernet port and your Internet connection has a public IP address,
you can set up your server to share an Internet connection with other computers on your network,
linking your local network to the Internet.
During setup, you specify:
 Internet port: The Ethernet port, or interface, that is connected to your DSL modem, cable modem,
or other Internet source. The Internet interface must have a public IP address (not a private IP
address like 10.0.7.1 or 192.168.99.1). For example, if the server’s built-in Ethernet port connects to the
Internet, you would specify it as the Internet port.
 Local network ports: Your server’s other Ethernet port is automatically set as the one that is
connected to your local network. If your server has more than two active Ethernet ports, you specify
which ones are connected to local networks.