XP will only accept one (1) incoming VPN connection at a time. Reference the
XP Resource Kit...
"Incoming Connection Types
By creating an incoming connection, a computer running Windows XP
Professional can act as a remote access server. You can configure an
incoming connection to accept the following connection types: dial-up
(modem, ISDN, X.25), VPN (PPTP, L2TP), or direct cable connection as shown
in Table 25-1. On a Windows XP Professional-based computer, an incoming
connection can accept up to three incoming calls, up to one of each of these
types. This can be an effective, low-cost option in a telecommuter's home
office or a remote office to which the corporate network occasionally needs
to send data."
http://www.microsoft.com/technet/prodtechnol/winxppro/reskit/c25621675.mspx#EBE
With that said, if you want to use an XP box as a VPN server you could use
OpenVPN a free SSL VPN solution or as noted upgrade to a SBS or Windows 2003
Server solution.
If your interested in the OpenVPN solution see these links which include
working examples of server and client configuration files, etc...
http://tinyurl.com/gae6k
Another alternative may be to purchase a VPN end-point type router for the
office. Examples include these from Linksys. Note other manufacturers like
ZyXEL make these also...
http://www.dslreports.com/forum/remark,14923848
--
Al Jarvi (MS-MVP Windows Networking)
Please post *ALL* questions and replies to the news group for the
mutual benefit of all of us...
The MS-MVP Program -
http://mvp.support.microsoft.com
This posting is provided "AS IS" with no warranties, and confers no
rights...