Settings For Tcp/Ip - Lancom 1711+ VPN Manual

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The ISDN calling line ID (CLI)
The ISDN Calling Line Identity (CLI)is the phone number of the calling party as transmitted to
the called party. This is a number generally made up of the national dial code and an MSN.
The CLI is ideal for authentication for two reasons: It is difficult to manipulate. It is transmitted
free of charge via the ISDN D-channel.
6.1.2

Settings for TCP/IP

TCP/IP requires that every active RAS is assigned an IP address.
This IP address can be manually set to a fixed value when the user is created.
A simpler option is to allow the LANCOM Router to assign the user with a free
IP address when dialing in. In this case, all you have to do is to set the range
of IP addresses which are to be available for assignment to the RAS users by
the LANCOM Router.
For both manual and automatic IP address assignment, ensure that the
addresses are freely available in your local network. In our example, the PC is
assigned with the IP address '10.0.1.101' when it dials in.
This IP address allows the PC to fully participate in the LAN: With the appro-
priate rights, it can access any other device in the LAN. This relationship also
applies in the other direction: The remote PC can be access from the LAN.
LANCOM 821+ – LANCOM 1711+ VPN – LANCOM 1721+ VPN
You will find information on the other parameters required for RAS
access in the chapter 'Connecting two networks'.
10.0.1.100
(0123) 123456
Chapter 6: Providing dial- in access
LAN at the main
office. IP: 10.0.1.0
VPN or ISDN con-
nection
User: 'SMITH'
(0123) 777888
Remote computer
IP: 10.0.1.101
ISDN adapter
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