96
C
HAPTER
7: LAN-
TO
-LAN R
OUTING
Establishing
Connections to
Remote Gateways
The RAS 1500 forwards a packet to a gateway for which there is an
established connection, such as a gateway on the same segment of the
local LAN or at the other end of an active dial-up connection. All the RAS
1500 does in these situations is send the packet out the correct interface.
However, when there is no existing connection, the RAS 1500 has to do
more work. When you define a dial-out user in the RAS 1500 that is
intended to connect to another routing device, the entry contains a list of
remote gateways that the RAS 1500 can dial into. When the RAS 1500
does not have a connection to a packet’s next hop, it looks up the
address of the gateway in the user table. Dial scripts are most useful for
on-demand routing sessions. In these situations, the RAS 1500 connects
to a remote gateway only when it has packets queued for that location.
You can also create a default route gateway to reach a remote network
your RAS 1500 is not aware of by manually specifying it.
Spoofing
The RAS 1500 supports spoofing between another RAS 1500 or Total
Control products. Spoofing is an inexpensive way to make two sides of a
disconnected circuit believe that the connection still exists in order to limit
network traffic and maintain the advantages of on-demand service. The
RAS 1500 spoofs RIP broadcasts.
Authentication
The RAS 1500 auto-detects Password Authentication Protocol (PAP) and
Challenge Handshake Authentication Protocol (CHAP) login
authentication on Point-to-Point Protocol (PPP) links.
The RAS 1500 also provides Remote Authentication Dial-In User Service
(RADIUS) and network operating system (NOS) authentication support for
PPP connections.
PAP Authentication
PAP supplies a clear text password sought by the authenticating system.
Although the RAS 1500 does not initiate dial-out PAP authentication, you
can accomplish the same effect by creating a dial script containing the
expected prompts and the required responses.
The RAS 1500 responds to a dial-in PAP authentication request, though.
All you need is a User Table entry for the remote device.
Summary of Contents for REMOTE ACCESS SYSTEM 1500
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