Microsoft VPN and iptables

[bentan74@xxxxxxxxxxxxxx (Ben Tan)]

hi,
    if you're using PPTP, pls allow 1723 ports and also gre protocol, as gre
protocol will be used after the authentication.

    but if you're able to connect to the VPN server, the failed connection
maybe due to the remote access policy that you'd implemented on the VPN
server side or RADIUS server.

cheers
ben