ELSA LANCOM Business 6000, Руководство пользователя

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Operating modes and functions
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ELSA LANCOM Business 6000
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56
EN
Verification of name
The routers' response is obvious: Only those calls with recognized names are
accepted if protection by name is set; all others are rejected.
In the case of the PPP protocol, the user name of the remote station
(frequently identical to the device name) is checked against the local PPP list.
Only a name, no secret password? The PPP does also offer this option: It is
also possible here to request a form of protection available specifically to this
protocol based on PAP (Password Authentication Protocol), CHAP (Challenge
Handshake Authentication Protocol) or MS CHAP (a Microsoft variety of
CHAP).
In the case of PPP, a user name (and in conjunction with PAP, CHAP or MS-
CHAP, a password) is sent to the remote station during connection
establishment. When a computer dials into the
ELSA LANCOM Business , the
communications software, for example Windows Dial-Up Networking,
prompts the user for the user name and password to be transferred.
If the router itself establishes a connection, to an Internet service provider for
example, it uses the user name and password from the PPP list. If no user
name has been entered there, the device name will be used instead.
The PPP list can be found in the ELSA LANconfig in the 'Communication'
configuration section on the 'Protocols' tab, or in the
/Setup/WAN-
module/PPP-list
menu.
In addition, the PPP protocol also permits the caller to require an
authentication from the remote station. The caller then requests a user or
device name and password from the remote station.
Obviously you will not need to use the PAP, CHAP or MS CHAP security
procedures if you are using the ELSA LANCOM Business to dial up an Internet
service provider yourself, for example. You will probably not be able to
persuade the ISP to respond to a request for a password...
Checking the number
When a call is placed over an ISDN line, the caller's number is normally sent
over the D channel before a connection is even made (CLI—Calling Line
Identifier).
Access to your own network is granted if the call number appears in the
number list, or the caller is called back if the callback option is activated. If
the
ELSA LANCOM Business is set to provide security using the telephone