I've the following scenario:
Main office: SBS2003 with VPN PPTP server behind a Router Cisco 1841 with an IOS 12.3 advipservices.
Remote Offices: Microsoft PPTP clients behind Zyxel routers.
Now I've to setup about 7 PPTP connections from the remote offices to the main office trough the Cisco Router. Should I use a PAT redirection to the SBS server (1723 and GRE) ? Wich are the right instruction and ACLs?
Thanks All Piertonio