hotspot through VPN

Hi,
I’m asking for help concerning a configuration i want to setup.
First here is the network schema:

What I want to do is to use my access point on the LAN2 network as a hotspot. To do so i configured a pptp server/client. All traffic is redirected through it and everything is working very fine.
Now I would like to disable my dhcp server on LAN2 and use dhcp forward to get ip from the Hotspot network 192.168.21.0 in order to allow my Client 3 and 4 to behave like if they were connected directly on the hotspot..
Is it possible? And if indeed, how can i configure it on my mikrotik (route, NAT, firewall rules…???)?
Thanks by advance,
Guillaume

Think the first lan 2 should have been 3. The essays, not best, way, is to make PPTP server on access point (hotspot).

I thought about this too.
But if i do so if someone login every client will have internet access.
If someone have a better solution…
Thanks

I did something like that, but used EoIP tunnels. I have more than 20 tunnels to different subnets and they all work fine.
Good luck!

Thank you but this is a proprietary protocol compatible only with RouterOS and I’m using different kind of systems.
In fact I actually found a solution, so if it can be useful for someone else, here it is:
My Ap is a WRT54GL router and so I used CoovaAP for the hotspot needs.
To be able to use usermanager as an authentication server I opened a ppp tunnel to the mikrotik and configured the Radius parameters in CoovaAP.
Everything is working fine even if the CoovaAP portal is not so elaborated as the RouterOS one.
Thank you for your experiences.