Our client concern is if they use pptp (UserID + Password) is not safe since everyone can access their internal network if someone pick up the UserID & password (and know the IP). They are wonder how they can arrange the vpn access that similar to Fortigate’s VPN. Which has 2 sets of usernames + password, plus a cert. file.
e.g. for example
The router portal generate a cert. file.
Install the client software to computer.
Import the cert file into the client software with 1st set of ID & password.
Then the client is ready for dialup and connect to VPN router with 2nd set of ID & password.