Hello,
I’m so frustrated because I can’t solve this problems 
. Here is the deal:
My friend and I bough the RouterBoard 411A and the r52 wireless card so we would set up an AP to share files, play games, and share internet. I did set the interfaces, IP addresses and DHCP server. The router IP is 10.0.0.1 and clients are from 10.0.0.10-10.0.0.100. OK that was for a start. Now i have problems setting up MAC filter and internet sharing trough pptp. I found some solutions for mac filter but i always have some problems with it. So explain this on the run please 
.
The internet sharing problem is alot bigger. Here is the situation. We have the AP and clients are connected to it. The AP is located on my friends house and I have the internet. I also have a wireless router, and in this computer I have plugged the internet cable. I set an Ad-Hoc connection to the mikrotik router and the canyon router has 10.0.0.8 address. This canyon router cant be a pptp server or anything like it, only client and he uses this to connect to the internet provider. With a little help from a guy I know we did connected canyon to mikrotik as a client and somehow everybody who connects to the wireless can go on internet. We set NAT rule, Chain:srcnat ; Out. Interface: Wlan1 ; Action:masquerade and that’s all.
Now here is what i want. Who connects to the wireless doesn’t get the internet only the ones who connect trough pptp with a username and password. How can i do that?
And how to set that you get DHCP DNS and Gateway. Cause i set that you get an IP address as mask, now you just have to write 10.0.0.8 for gateway and dns and you can go on net. Pleas help.
Sorry for grammar mistakes, i don’t know English to well and I’m bloody nervous.
