The NetBIOS interface only binds to the first bound Internet Protocol (IP) on a NIC.
RRAS/PPTP 10.10.0.1 | / \ LAN(1) ------------ Router ---- Internet ---- ISP ---- RAS/PPTP client 10.10.0.0 Firewall \ /When the client dials their ISP and then dials the PPTP connection, the router is configured to accept the PPTP traffic, so the connection is made.
This causes a host route to be entered in the host's route table, because the PPTP connection is the default gateway for the client computer. When the client tries to use NetBIOS resources on the RRAS server, the IP stack on the client sends the data to the static route, which is dropped by the router/firewall.
To resolve this difficulty, install a loopback adapter on the RRAS server and give it a different IP address:
RRAS/PPTP 126.96.36.199 --- 10.10.0.1 | / \ LAN(1) ------------ Router ---- Internet ---- ISP ---- RAS/PPTP client 10.10.0.0 Firewall \ /Use an LMHOSTS file on the client to resolve the name of the RRAS server to this new IP address. Change the RRAS static pool to give out addresses on this new network (188.8.131.52).