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Operating modes and functions
61
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ELSA LANCOM Wireless IL-II
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EN
In PPP connections, the name and password is sent to the remote station dur-
ing the call establishment, in the Dial-up Networking connection window for
example. The device name, password and user name in the PPP list are used
if the router establishes the connection itself.
Checking the
number
Access to your own network is granted if the call number appears in the num-
ber list, or the caller is called back if the callback option is activated. If the
LANCOM Wireless
is set to provide security using the telephone number, any
calls from remote stations with unknown numbers are denied access.
Callback
The callback function offers a special form of access privilege: This requires
the 'Callback' option to be activated in the name list for the desired caller and
the call number to be specified, if required.
You can use the settings in the name and number list and the selection of the
protocol to control the callback action of your router:
The router can refuse to call back.
It can call back using a preset call number.
The caller can opt to specify the call number to be used for callback.
And all the while you can use the settings to dictate how the cost of the con-
nection is to be apportioned. The router accepts all unit charges, except for
the unit required to send the name, if call back 'With name' is set in the name
list. Likewise, a unit is charged to the router, if the caller is not identified by
means of CLIP. On the other hand, the caller incurs no costs if identification
of the caller's number is possible and is accepted.
If the router is requested to call back, the Fast Call Back procedure (patent
pending) can be used with many other parties. This speeds up the callback
procedure considerably.
The hiding place—IP masquerading (NAT, PAT)
But this provokes objections from the network manager responsible for the
security of data on the company's network: Every workstation computer on
the WWW? Surely this means that anyone can get in from outside?—Not
true!
IP masquerading provides a hiding place for every computer while connected
with the Internet. Only the router module of the unit and its IP address are
visible on the Internet. The computers in the LAN then use the router as a
gateway so that they themselves cannot be detected. To do this, the router
100324 Wireless IL-11.book Seite 61 Montag, 30. Oktober 2000 4:13 16
