D-Link DFL-260E User Manual for DFL-260E - Page 412
The TLS Alternative for VPN
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9.1.5. The TLS Alternative for VPN Chapter 9. VPN It is probably better using more keys than is necessary today since it will be easier to adjust access per user (group) in the future. • Should the keys be changed? If they are changed, how often? In cases where keys are shared by multiple users, consider using overlapping schemes, so that the old keys work for a short period of time when new keys have been issued. • What happens when an employee in possession of a key leaves the company? If several users are using the same key, it should be changed. • In cases where the key is not directly programmed into a network unit, such as a VPN firewall, how should the key be stored? On a floppy? As a pass phrase to memorize? On a smart card? If it is a physical token, how should it be handled? 9.1.5. The TLS Alternative for VPN If secure access by clients to web servers using HTTP is the scenario under consideration, then using a NetDefend Firewall for TLS termination can offer an alternative "lightweight" VPN approach that is quickly and easily implemented. This topic is described further in Section 6.2.10, "The TLS ALG". 412
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