... L2TP/IPSec Windows Server 20 03, Windows XP, Windows 2000, Pocket PC 20 03, and Windows Mobile 20 03. Microsoft L2TP/IPSec VPN Cli-ent, Windows NT 4.0 Workstation, Windows Me, and Windows 98 are ... Protocol Microsoft Operating System PPTP Windows Server 20 03, Windows XP, Windows 2000, Windows NT 4.0, Windows Millennium Edition (Me), Windows 98, Windows CE version 3. 0, Pocket PC 2002 and Windows ... interoperability with Windows- based PPTP clients. Summary The VPN technologies provided with all supported Windows client operating sys-tems—including Windows 2000, Windows XP, and Windows Server 20 03 support...