HP TMS zl Module Security Administrator's Guide

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Configuring a VPN on the HP TMS zl Module
GRE Tunnels
Figure 4-267. Manage IPsec Wizard > Add IPsec Proposal Window
4. In the Add IPsec Proposal window, type a descriptive string of 1 to 32
alphanumeric characters for Proposal Name. The string must be unique to
this proposal.
Often, it is a good idea to indicate the algorithms that you will select in
the name—for example, ESP3desMD5.
5. For Encapsulation Mode, typically select Transport Mode.
This is the correct mode for this type of VPN because the TMS zl Module
and the remote tunnel endpoint originate all of the GRE traffic.
6. For Security Protocol, select AH or ESP.
7. If you selected ESP in the previous step, select one of the following for
Encryption Algorithm:
• NULL
If you select this option, VPN traffic will not be encrypted.
•DES
•3DES
• AES-128 (16)