Hello people, i have purchased rb750 and configured the pptp server. also i configured secret users for clients to be able to connect to my router. my clients have only a vpn dialer (of windows) which are able to connect to my router, they can ping the router but can't ping my lan computers (which arec onnected to it).
what i have to configure in my router for them to be able to access my server?

thanks in advance.

Do they have your RB as your default gateway?
What is the IP address of the LAN users and PPTP users?
If you set PPTP users in the same networks as LAN users, you should enable arp-proxy for interface which PPTP users are connected to it.

For more info http://wiki.mikrotik.com/wiki/Manual:Interface/PPTP

thnk you! it helped, i changed the ether2 to arp-proxy, in ethernet.

That's what we do in Mikrotik forum