The Tls Alternative For Vpn - D-Link NetDefendOS User Manual

• How will keys be distributed? Email is not a good solution. Phone conversations might be
secure enough.
• How many different keys should be used? One key per user? One per group of users? One per
LAN-to-LAN connection? One key for all users and one key for all LAN-to-LAN connections? 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 6.2.11,
"The TLS ALG".
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Chapter 9: VPN