I have installed freeradius(mysql module) vpn(pptp) servers.

The vpn users are authenticated by username and password in radcheck table, but not specified a IP address.

In my servers, there are multiple IP address.

When use vpn, my computer shows a constant IP with all vpn accounts.

How can i specify IP for vpn accounts?

What i want is that different vpn users use different IP address.

Could anyone help me?