Operation Manual

User Name and Password
32 NetWAYS/ISDN – 3 Remote Access with NetWAYS/ISDN
Transmission of the caller’s number over the ISDN D channel
(Calling Line Identification, or CLI) is an ISDN feature used by
NetWAYS/ISDN for protection against unauthorized access
and for charge assignment.
In order for the “CLI” number check to function in
NetWAYS/ISDN, the CLI feature must be activated for the
ISDN line by the ISDN provider.
User Name and Password
As a further security mechanism, NetWAYS/ISDN provides
authentication by user name and password. The authentica-
tion process tests whether the remote system possesses a
user name and password that match the information regis-
tered locally. If so, the remote systems is authentic and the
connection can be set up.
Password authentication ensures that only authorized users
can access a system. The user name and password for au-
thentication with the remote site can be obtained from the
network administrator.
Authentication by user name and password is performed un-
der the PPP over ISDN protocol.
The PPP protocol provides two authentication techniques:
PAP (Password Authentication Protocol)
CHAP (Challenge Handshake Authentication Protocol)
PAP and CHAP can be used for authentication on both outgo-
ing and incoming calls.
Security Call-back
For still greater security, the remote access server can dis-
connect and call the remote computer back after authenti-
cating it by user name and password. The number dialed for
the return call is the CLI number. If the CLI number received
is not the complete number, the security call-back can also
take place using a number specified explicitly in the remote
access server’s configuration.
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