To enable your Cisco PIX firewall for VPN access:
1) Connect the cable between PIX and your COM port
2) Open Hyperterminal (All Programs->Accessories->Communications)
3) When the Connect to box opens up, select the COM port that the cable is connected to
4) Enter your password when prompted
5) Enter = config t - press enter
6) Enter = fixup protocol pptp 1723 - press enter
7) Enter = write mem - press enter
Exit Hyperterminal