1723 and 443 TCP ports should be open, also your firewall/router/ISP must allow VPN/PPTP pass-through for PPTP VPN.

Typical working: embedded Microsoft firewall in Windows, Linksys/D-Link/TP-Link/ASUA Router manufactured after year 2007, ADSL broadband.

Typical not-working: not-Microsoft firewall, Netgear/Trend Router, all router-integrated ADSL modem. If you get error 619 with ADSL connection, please remove home router and disable not-Microsoft firewall software.

George Yellow