Linksys AG241 manual Access Restrictions Tab Internet Access, Other Setting

Chapter 2

Configuration

Key Life Time  In the Key Lifetime field, you may optionally select to have the key expire at the end of a time period of your choosing. Enter the number of seconds you’d like the key to be used until a re-key negotiation between each endpoint is completed.

Phase 2

Encryption  The encryption method selected in Phase 1 will be displayed.

Authentication  The authentication method selected in Phase 1 will be displayed.

PFS  The status of PFS will be displayed.

Group  There are two Diffie-Hellman Groups to choose from: 768-bit and 1024-bit. Diffie-Hellman refers to a cryptographic technique that uses public and private keys for encryption and decryption.

Key Life Time  In the Key Lifetime field, you may select to have the key expire at the end of a time period of your choosing. Enter the number of seconds you’d like the key to be used until a re-key negotiation between each endpoint is completed.

Other Setting

NAT Traversal

NetBIOS broadcast  Check the box next to this field to enable NetBIOS traffic to pass through the VPN tunnel.

Anti-replay Check the box next to this field to enable the Anti-replay protection. This feature keeps track of sequence numbers as packets arrive, ensuring security at the IP packet-level.

Keep-Alive If you select this option, the Gateway will periodically check your Internet connection. If you are disconnected, then the Gateway will automatically re- establish your connection.

Check this box to block unauthorized IP addresses  Enter in the field to specify how many times IKE must fail before blocking that unauthorized IP address. Enter the length of time that you specify (in seconds) in the field.

When finished making your changes to this screen, click Save Settings to save the changes, or click Cancel Changes to undo your changes.

The Access Restrictions Tab > Internet Access

The Internet Access screen allows you to block or allow specific kinds of Internet usage. You can set up Internet access policies for specific computers and set up filters by using network port numbers.

Access Restrictions > Internet Access

Internet Access

Internet Access Policy  Multiple filters can be saved as Internet Access Policies. When you wish to edit one, select the number of the policy from the drop-down menu. The screen contents will reflect the settings of the currently selected policy. If you wish to delete the Policy, click Delete. To see a summary of all policies, click Summary.

Internet Access Policy > Summary

On the Summary screen, the policies are listed with the following information: No., Policy Name, Days, and Time of Day. To delete a policy, click the policy’s check box and click Delete. To return to the Internet Access Policy screen, click Close.

Status  Policies are disabled by default. To enable a policy, select the policy number from the drop-down menu, and click Enabled.

The remaining fields on the screen are used to create a new policy, or to display the settings of an existing policy.

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