Before You Set Up VPN Service

Before setting up Virtual Private Network (VPN) service, you need to determine which transport protocol you’re going to use. The table below shows which protocols are supported by different platforms.

If you have...

you can use L2TP/IPSec.

you can use PPTP.

Mac OS X 10.3.x clients

X

X

 

 

 

Mac OS X 10.2.x clients

 

X

 

 

 

Windows clients

X (if Windows XP)

X

 

 

 

Linux or Unix clients

X

X

 

 

 

If you’re using L2TP, you need to have a Security Certificate from a Certificate Authority like Verisign, or a pre-defined shared secret between connecting nodes. If you choose a shared secret, it needs to be secure as well (8-12+ alphanumeric characters with punctuation) and kept secret by the users.

If you’re using PPTP, you need to make sure all of your clients support 128-bit PPTP connections, for greatest transport security. Be aware that enabling 40-bit transport security is a serious security risk.

Managing VPN Service

This section describes tasks associated with managing VPN service. It includes starting, stopping, and configuring the service.

Starting or Stopping VPN Service

You use Server Admin to start and stop VPN service.

To start or stop VPN service:

1In Server Admin, choose the VPN Service from the Computers & Services list.

2Make sure at least one of the transport protocols is checked and configured.

3Click Start Service or Stop Service.

When the service is turned on, the Stop Service button is available.

Enabling and Configuring L2TP Transport Protocol

Use Server Admin to designate L2TP as the transport protocol. By enabling this protocol, you must also configure the connection settings. You must designate an IPSec shared secret (if you don’t use a Certificate Authority’s Security Certificate), the IP address allocation range to be given to your clients, and group to be allowed VPN priviledges (if desired). If both L2TP and PPTP are used, each protocol should have a separate, non-overlapping address range.

Chapter 5 VPN Service

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Apple 034-2351_Cvr manual Before You Set Up VPN Service, Managing VPN Service, Starting or Stopping VPN Service
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