1) SSTP VPN connection can not be blocked
2) Our SSTP VPN Servers are located in Canada, UK and Netherlands
3) SSTP - Secure Socket Tunneling Protocol or also known as Microsoft SSL VPN
4) Typical VPNs (such as PPTP ot L2TP) may be blocked by governments or your ISP, while SSTP can not be blocked
5) SSTP protocol is based on SSL instead of PPTP or IPSec and uses TCP Port 443 for relaying SSTP traffic
6) Blocking issues involving connections in relation to PPTP GRE port blocking or L2TP ESP port blocking via a firewall or NAT router preventing the client from reaching the server will no longer be a problem as ubiquitous connectivity is achieved. Clients will be able to connect from anywhere on the internet.
7) SSTP Configuration instructions can be found here:
SSTP VPN Configuration for Windows 7 and Vista