VPN connection to Windows 2000 RAS works within iptables without a problem. Iptables has TCP port 1723 and protocol 47 open, the same way as other ports such as 80, 25, 443. Other services such as http, https, smtp works fine. When I try PPTP vpn from outside of iptables using windows vpn client, it hangs at verifying user name and password. I don't have any other ports open. Do I need to open some other ports in order for vpn connection to go through iptables? Any input will be appreciated. Thanks.
