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In Mac OS X Server 10.6 Snow Leopard: DNS and Network Services, instructor Sean Colins introduces the networking services available in Snow Leopard Server. This course covers setting up a DNS server to provide network resources, using firewalls to protect systems against intrusion and to route traffic, using DHCP to automatically configure network settings for computers when they join a network, and accessing a network securely via a remote VPN (virtual private network) connection. Exercise files accompany the course.
Here in the VPN chapter, again, we will need Snow Leopard Server installed and set up. We will also want to connect a client machine to the Internet via some other network, other than what we have got set up, and this is a really different reason than the stuff we were talking about over in DHCP. The point of the VPN is that you have to make a remote connection. Well, if your client is connected to the same network as the VPN server, it sort of misses the point. So, get yourself a client, hook it up to something on the outside world if you can.
A Wi-Fi card from a cell provider is a good choice here, or you can go over to a friend's house and try it from there. That would work too. One way or the other you are going to need to have that connection outside. If you want to use the fully qualified domain name of your server from the Internet in your VPN configuration, you'll have to have that ISP level DNS set up correctly. Otherwise from the outside, you are just not going to be able to connect your server. Now you could always use your external IP address so just remember that is possible too. Be sure to have Firefox or whatever program is necessary to work with your router available for you to use, because we do actually go in and make changes to the router in this chapter.
So it's important to have whatever prerequisites are necessary for your router in place before we get started.
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