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SonicOS Enhanced 4.0 Administrator Guide
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Select the DH Group from the DH Group menu.
Note The Windows 2000 L2TP client and Windows XP L2TP client can only work with
DH Group 2. They are incompatible with DH Groups 1 and 5.
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Select 3DES, AES-128, or AES-256 from the Encryption menu.
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Select the desired authentication method from the Authentication menu.
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Enter a value in the Life Time (seconds) field. The default setting of 28800 forces the
tunnel to renegotiate and exchange keys every 8 hours.
Step 5 In the IPsec (Phase 2) Proposal section, select the following settings:
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Select the desired protocol from the Protocol menu.
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Select 3DES, AES-128, or AES-256 from the Encryption menu.
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Select the desired authentication method from the Authentication menu.
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Select Enable Perfect Forward Secrecy if you want an additional Diffie-Hellman key
exchange as an added layer of security. Select Group 2 from the DH Group menu.
Note The Windows 2000 L2TP client and Windows XP L2TP client can only work with DH
Group 2. They are incompatible with DH Groups 1 and 5.
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Enter a value in the Life Time (seconds) field. The default setting of 28800 forces the
tunnel to renegotiate and exchange keys every 8 hours.
Step 6 Click the Advanced tab.
Step 7 Select any of the following optional settings you want to apply to your GroupVPN policy:
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Enable Windows Networking (NetBIOS) broadcast - Allows access to remote
network resources by browsing the Windows® Network Neighborhood.
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Enable Multicast - Enables IP multicasting traffic, such as streaming audio (including
VoIP) and video applications, to pass through the VPN tunnel.