Remote access service
With the Remote Access Service ( RAS for short ; from English remote , "remote, remote", access , "access" and service , " service "), Microsoft Windows NT clients that are located outside of a protected local network can to connect to it via a modem, ISDN or X.25 connection. Not only are different clients supported, there is also great flexibility in the selection and combination options of the network protocols used .
The clients connected to the NT network via RAS can access the entire functionality of the network as if they were directly connected locally to the network. B. the use of teleworking .
How it works
RAS allows remote clients to connect to the RAS server using a phone line or other wide area network (WAN) connection; from there, RAS enables these clients to access resources in the network. Remote users can access network resources as if they were logged on to a computer directly connected to the network. To allow a user to remotely access the RAS server, use the User Manager for Domains administration tool and give the user permission to dial. You can set three forms of dial-in permission:
- No callback: Grants the user permission to dial into the network via the RAS server.
- Set by caller: Terminates the connection after the user has dialed into the RAS server. The RAS server dials the user back on the phone number specified by the user. This function is called callback.
- Preset to: Also uses callback, but the server always calls the user back on a telephone number preset on the server.
RAS on Windows provides both dial-up and selection, and supports up to 256 simultaneous inbound connections on the Windows NT server, but only one inbound connection on the Windows NT workstation. Clients wanting to connect to a remote access server must have dial-up networking or a similar application installed. RAS is fully integrated into the Windows NT security model and supports encrypted authentication, auditing, callback, and intermediary hardware security hosts. Users can be restricted to access only the RAS server or to access through the RAS server to all resources on the network.