PPTPServer

A minimalistic HowTo for using a MT Router OS as PPTP-Server, based on 2.9.x. Use it on your own risk.
I prefer bridge-groups as they are always up and one can add physical interfaces later. The arp=proxy-arp is important.
N.B. 8 Oct 2007: "set gre disabled=no" is not active on RouterOS 3.0rc5
/ interface ethernet
set ether1 name="ether1"

/ interface bridge
add name="lan" arp=proxy-arp

/ interface bridge port
add interface=ether1 bridge=lan

/ ip address
add address=192.168.0.1/24 interface=lan

/ ip dns
allow-remote-requests=yes

/ ip firewall service-port
set gre disabled=no
set pptp disabled=no

/ ip pool
add name="pptp" ranges=192.168.0.200-192.168.0.229

/ ppp profile
add name="pptp-in" local-address=192.168.0.1 remote-address=pptp use-encryption=required only-one=yes change-tcp-mss=yes dns-server=192.168.0.1

/ interface pptp-server server
set enabled=yes max-mtu=1460 max-mru=1460 authentication=chap,mschap1,mschap2 default-profile=pptp-in

/ ppp secret
add name="user-1" service=pptp password="******" profile=pptp-in
add name="user-2" service=pptp password="******" profile=pptp-in
# ...