David Vielmetter

Tag: port 1723

  • PPTP VPN: testing whether GRE 47 traffic is allowed

    Some networks block the basic requirements for PPTP VPN connections. Hotels sometimes do this prevent guests from skirting their internet content policies. To establish a PPTP VPN connection, the host network must allow traffic on port 1723 and Generic Route Encapsulation (GRE) 47 traffic. Both requirements must be met by the host network to establish a successful PPTP…