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14: Remote Connection Basics
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Every operating system comes with the software to help you set up a dial-up connection In Windows Vista you go to the Set up a dial-up connection option in the Network and Sharing Center (Figure 14-30) Whatever the name, this tool is what you use to create dial-up connections
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Figure 14-30 Dial-up on Windows Vista
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Private Dial-Up
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A private dial-up connection connects a remote system to a private network via a dialup connection Private dial-up does not use the Internet! Private dial-up requires two systems One system acts as a remote access server (RAS) The other system is the client running a connection tool (usually the same tool you just saw in the previous section) In Windows an RAS is a server running Remote Access Service (RAS) dedicated to handling users who are not directly connected to a LAN, but who need to access file and print services on the LAN from a remote location For example, when a user dials into a network from home using an analog modem connection, she is dialing into a RAS Once the user is authenticated, she can access shared drives and printers as if her computer were physically connected to the office LAN
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NOTE When you run the Microsoft product Remote Access Service on a server, you turn that server into remote access server
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You must set up a server in your LAN as a RAS server That RAS server, which must have at least one modem, accepts incoming calls and handles password authentication RAS servers use all the standard authentication methods (PAP, CHAP, EAP, 8021X, and so on) and have separate sets of permissions for dial-in users and local users You must also configure the RAS to set the dial-in user s rights and permissions Configuring a RAS system is outside the scope of this book, because each one is different, but it s something you must do to get RAS to work correctly (Figure 14-31)
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Figure 14-31 Windows RAS in action
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NOTE Remote access server is a catchall phrase It refers to both the hardware component (servers built to handle the unique stresses of a large number of clients calling in) and the software component of a remote access solution Most techs call RAS razz, rather than use the initials, R-A-S This creates a seemingly redundant phrase used to describe a system running RAS: RAS server This helps distinguish servers from clients and makes geeks happier
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14: Remote Connection Basics
Creating the client side of a private dial-up connection is identical to setting up a dial-up connection to the Internet The only difference is that instead of having an ISP tell you what IP settings, account name, and password to use, the person who sets up the RAS server tells you this information (Figure 14-32)
Figure 14-32 Dial-up on Macintosh OS X
VPNs
A VPN enables you to connect through a tunnel from a local computer to a remote network securely, as you ll recall from the in-depth discussion in 12 Refer back to that chapter for the details
Dedicated Connection
Dedicated connections are remote connections that are never disconnected Dedicated connections can be broken into two groups: dedicated private connections between two locations, and dedicated connections to the Internet Dedicated private connections manifest themselves as two locations interconnected by a (usually high-speed) connection such as a T1 line (Figure 14-33)
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Router
CSU/DSU
CSU/DSU
Router
Figure 14-33
Dedicated private connection
Each end of the T1 line goes into a router (After going through a CSU/DSU, of course!) Note that this connection does not use the Internet in any way it is not a VPN connection Dedicated connections of this type are expensive and are only used by organizations that need the high bandwidth and high security these connections provide These connections are invisible to the individual computers on each network There is no special remote connection configuration of the individual systems, although there may be some configuration of DHCP, DNS, and WINS servers to insure that the network runs optimally
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