Yes , VPN comes up if I replace my WI-FI modem/router with the same ISP.
I am not reason come from port on WI-FI modem/router. I think the port 4500 and 500 opened already.
Because, other company still connect VPN thought this WI-FI modem sucessfully. They used Cisco VPN
client software. But my PC use NCP Secure Entry Client software in VPN connection not successfully.