I have setup a PPTP server, and defined a set of PPP secrets.
As PPTP client account should be centrizely managed, I’m thinking to use Radius for AAA. What I’m unclear is, a PPP sceret defines local/remote addresses, how Radius offers such information to PPTP server? Is ther any documentation or sample?
This PDF: https://www.mikrotik.com/testdocs/ros/2.9/guide/aaa_radius.pdf suggests that a radius server can use Framed-IP-Address and Framed-IP-Netmask attributes to offer an IP and Subnet to a client.
If you don’t care what IP the clients will get, then specify the IP-Pool in Winbox > PPP > default-encryption. Both local and remote addresses should use the same pool. Then in Winbox > PPP > Interface, click the PPTP Server button and ensure the default profile is default-encryption.
Note that you can’t use DHCP reservations since the Mikrotik PPTP server is drawing directly from the IP-Pool rather than making a DHCP request.
If your DHCP server is not the Mikrotik, that is ok too. Reserve a range of IPs in your DHCP server and create the pool on the Mikrotik.