Wireless Security.pdf - PDF Archive

Implementing Advanced Wireless Security 531
Figure 21.36 : The Filter Properties window
this accordingly. Enter the subnet mask for your network in the Subnet Mask field. By
default, this is 255.255.255.0. Choose My IP Address in the Destination Address field
( Figure 21.36 ).
Click the OK button to close this window. Next, click OK in Windows XP or Close in
Windows 2000. This filter is used for communication from the router to your computer.
21.4.1.3 Establishing the Tunnel Rules
The rules that are employed by the tunnels must be set up in order to properly filter traffic
through the VPN tunnel. First, select the tunnel you created for communication from
your computer to the router and then click the Filter Action tab. Next, select the Require
Security radio button and click Edit to open the Require Security Properties window, as
shown in Figure 21.37 .
Ensure that the Negotiate security radio button is selected. Then, deselect Accept
unsecured communication, but always respond using IPSec and select Session key perfect
forward security (PFS) , as shown in Figure 21.38 .
Click OK to return to the New Rule Properties window. Select the Authentication
Methods tab and click Edit to open the Edit Authentication Method Properties window.
Choose the Use this string (preshared key) radio button and enter the pre-shared key in
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