Can I use Purevpn through my Cable / DSL router or firewall?
If your router/firewall supports PPTP pass-through, you should have no troubles connecting. Many routers/firewalls handle PPTP connections fine even though they do not explicitly advertise PPTP pass-through capability. Your firewall rules must be set up to allow outbound connections to our server IP on TCP port 1723 and IP protocol 47 (GRE).