HP TMS zl Module Security Administrator's Guide

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Configuring a VPN on the HP TMS zl Module
L2TP over IPsec VPNs
Note You could configure other settings. However, in that case, you could not use
the New Connection Wizard to set up the VPN connection on the Windows
client; instead, you would have to configure the IPsec settings for the connec-
tion manually and make sure to match the settings configured here.
6. For Security Protocol, select ESP.
7. Select one of the following for Encryption Algorithm, referring to Table 4-33:
• NULL
If you select this option, traffic will not be encrypted.
•DES
•3DES
• AES-128 (16)
• AES-192 (24)
• AES-256 (32)
The number in parentheses after AES options indicates the key length for
the algorithm in bytes.
8. For Authentication Algorithm, select one of the following, referring to
Table 4-33:
•None
You must not select this option if you have selected NULL in the
previous step.
•MD5
•SHA-1