i wanted to implement a vpn connection using microsoft technology.
i enabled ras on the host computer which has win 7. the host computer sits behind a di-524 router, so i've enabled pptp pass through and ipsec pass through, moreover, i set a port forwarding for 1723 and 500 (both tcp and udp) to the host computer.
from the guest computer, who sits in a different subnet and uses win xp, i used telnet to verify that the host server can be reached, there was no problem reaching it. then i verified the generic routing encapsulation (gre) is set too, so i've used pptpclnt and pptpserv, and gre check complete successfully.
still, when i set a vpn dialup connection, i get error 721 (after verifying username and password).
any vpn guru can help me here?