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64
Appendix C: Configuring IPSec between a Windows 2000 or XP Computer and the Gateway
How to Establish a Secure IPSec Tunnel
Wireless-G ADSL Gateway
3.
The IP Filter List screen should appear, as shown in Figure C-4. Enter an appropriate name, such as win-
>Gateway, for the filter list, and de-select the Use
Add
Wizard check box. Then, click the
Add
button.
4.
The Filters Properties screen will appear, as shown in Figure C-5. Select the Addressing tab. In the Source
address field, select My IP Address. In the Destination address field, select A specific IP Subnet, and fill in the
IP Address: 192.168.1.0 and Subnet mask: 255.255.255.0. (These are the Gateway’s default settings. If you
have changed these settings, enter your new values.)
5.
If you want to enter a description for your filter, click the Description tab and enter the description there.
6.
Click the
OK
button. Then, click the
OK
(for Windows XP) or
Close
(for Windows 2000) button on the IP Filter
List window.
Filter List 2: Gateway=>win
7.
The New Rule Properties screen will appear, as shown in Figure C-6. Select the IP Filter List tab, and make
sure that
win -> Gateway
is highlighted. Then, click the
Add
button.
Figure C-4: IP Filter List
Figure C-5: Filters Properties
Figure C-6: New Rule Properties
Page 72 / 95
65
Appendix C: Configuring IPSec between a Windows 2000 or XP Computer and the Gateway
How to Establish a Secure IPSec Tunnel
Wireless-G ADSL Gateway
8.
The IP Filter List screen should appear, as shown in Figure C-7. Enter an appropriate name, such as Gateway-
>win for the filter list,
and de-select the Use
Add Wizard
check box. Click the
Add
button.
9.
The Filters Properties screen will appear, as shown in Figure C-8. Select the Addressing tab. In the Source
address field, select
A specific IP Subnet
, and enter the IP Address: 192.168.1.0 and Subnet mask:
255.255.255.0. (Enter your new values if you have changed the default settings.) In the Destination address
field, select My IP Address.
10. If you want to enter a description for your filter, click the Description tab and enter the description there.
11. Click the
OK
button and the New Rule Properties screen should appear with the IP Filer List tab selected, as
shown in Figure C-9. There should now be a listing for “Gateway -> win” and “win -> Gateway”. Click the
OK
(for WinXP) or
Close
(for Win2000) button on the IP Filter List window.
Figure C-7: IP Filter List
Figure C-8: Filters Properties
Figure C-9: New Rule Properties
Page 73 / 95
66
Appendix C: Configuring IPSec between a Windows 2000 or XP Computer and the Gateway
How to Establish a Secure IPSec Tunnel
Wireless-G ADSL Gateway
Step 3: Configure Individual Tunnel Rules
Tunnel 1: win->Gateway
1.
From the IP Filter List tab, shown in Figure C-10, click the filter list win->Gateway.
2.
Click the
Filter Action
tab (as in Figure C-11), and click the filter action Require Security radio button. Then,
click the Edit button.
3.
From the Security Methods tab, shown in Figure C-12, verify that the Negotiate security option is enabled, and
deselect the
Accept unsecured communication
, but always respond using IPSec check box. Select
Session key Perfect Forward Secrecy
, and click the
OK
button.
Figure C-12: Security Methods Tab
Figure C-11: Filter Action Tab
Figure C-10: IP Filter List Tab
Page 74 / 95
67
Appendix C: Configuring IPSec between a Windows 2000 or XP Computer and the Gateway
How to Establish a Secure IPSec Tunnel
Wireless-G ADSL Gateway
4.
Select the
Authentication Methods
tab, shown in Figure C-13, and click the
Edit
button.
5.
Change the authentication method to
Use this string to protect the key exchange (preshared key)
, as
shown in Figure C-14, and enter the preshared key string, such as XYZ12345. Click the
OK
button.
6.
This new Preshared key will be displayed in Figure C-15. Click the
OK
or
Close
button to continue.
Figure C-14: Preshared Key
Figure C-13: Authentication Methods
Figure C-15: New Preshared Key
Page 75 / 95
68
Appendix C: Configuring IPSec between a Windows 2000 or XP Computer and the Gateway
How to Establish a Secure IPSec Tunnel
Wireless-G ADSL Gateway
7.
Select the
Tunnel Setting
tab, shown in Figure C-16, and click
The tunnel endpoint is specified by this IP
Address
radio button. Then, enter the Gateway’s WAN IP Address.
8.
Select the
Connection Type
tab, as shown in Figure C-17, and click
All network connections
. Then, click
the
OK
or
Close
button to finish this rule.
Tunnel 2: Gateway->win
9.
In the new policy’s properties screen, shown in Figure C-18, make sure that “win -> Gateway” is selected
and deselect the
Use
Add Wizard
check box. Then, click the
Add
button to create the second IP filter.
Figure C-16: Tunnel Setting Tab
Figure C-17: Connectin Type Tab
Figure C-18: Properties Screen

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