Bay Networks 3395A, Руководство по настройке

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Introducing the Communication Server
1-16 893-826-A
• Modem support.
ARAP can operate with any modem that supports a Hayes-compatible
command interface. (Modem configuration for ARAP is performed by
CCL scripts. CCL scripts are covered later in this chapter and in Chapter
8.)
• Remote access user dial-back.
ARAP supports user dial-back. This feature provides a way of ensuring
that only authorized users can connect to the network. (A complete
discussion of the available security methods is contained in Chapter 6.)
When the remote user first connects to the port, the user logs in using a
login name assigned by the network administrator. The port immediately
disconnects and requests the dial-back script for that user's name be
downloaded from a script server. The dial-back script contains the
telephone number for the modem to dial. The modem then dials that
number and attempts to establish a connection with that user.
Automatic Protocol Detection
Communication server ports can be configured to accept connections made via
different protocols, using the Automatic Protocol Detection Feature (APD).
Using APD, ports will automatically determine the protocol being used to make
a connection and adjust port settings appropriately. Alternatively, by not
enabling APD, ports can be dedicated for use by a single access serving
protocol.
Key features of APD include:
• An individual port can be configured to accept any connections made via
ARAP, PPP (which includes IPCP and IPXCP), SLIP (which includes
CSLIP), and interactive protocols, as well as all, none, or any combination
of these.
• Ports can be configured to limit the amount of time spent in an attempt to
determine which protocol is being used to make a connection. When the
time expires, then the port will either default to a specific protocol or log
out the connection, as specified by the server manager.
• All communication server security features (for example, SecurID,
Kerberos, and so on) apply to ports configured with APD enabled.
NOTE: ARAP operates on communication servers that support the 8-wire
cabling method. You must also use cables that are appropriate for using the
CTS/RTS flow control method.