HP ProCurve Threat Management Solution Implementation Guide 2009-05

C-54
Configure VPNs Using the HP ProCurve Threat Management Services zl Module
Configure a Client-to-Site L2TP over IPsec VPN for Windows XP Clients
Figure C-66. Windows XP—<Connection> Properties
Window > Security Tab
25. Click Settings next to Advanced (custom settings).
Figure C-67. Windows XP—Advanced Security Settings
26. For Data encryption, ensure that Require encryption (disconnect if server declines) is selected.
27. Select Allow these protocols.