Remote Access Server

NetBIOS Gateway

Windows 2000 includes the NetBIOS gateway for remote access clients that use either the NetBEUI protocol with the PPP remote access protocol or the AsyBEUI remote access protocol. With the NetBIOS gateway, a remote access client using NetBEUI can access any NetBIOS-based network resource that is reachable from the remote access server.

With the NetBIOS gateway, the remote access client can access any of the following resources:

Network resources available from the remote access server using NetBEUI
Network resources available from the remote access server using NetBIOS over TCP/IP
Network resources available from the remote access server using NetBIOS over IPX

The NetBIOS gateway component is responsible for:

Managing NetBIOS names.
When the initial connection is made, the remote access client passes its NetBIOS name, which is then added to the NetBIOS name table at the remote access server.
Passing NetBIOS packets from the remote access client to the LAN.
When the remote access client sends NetBEUI packets across the phone line, those packets are submitted to the NetBIOS gateway and sent over the NetBIOS providing protocols.
Passing NetBIOS packets from the LAN to the remote access client.
NetBIOS packets from the LAN, from any of the NetBIOS-providing protocols, are inspected for the NetBIOS computer name of the remote access client and sent back to the remote access client using NetBEUI.

Note

The NetBIOS gateway cannot be used to access non-NetBIOS resources, such as Web servers, FTP servers, and other types of Windows Sockets–based resources.

Figure 7.9 illustrates the NetBIOS gateway architecture of the remote access server.

Enlarge figure

Figure 7.9 NetBIOS Gateway