ELSA LANCOM Business Manuel De L'utilisateur page 234

R58 Description of the menu options
Operating The TCP/IP module of the router may be activated or deactivated here. In the default
configuration, the TCP/IP module is activated.
Configuration via TCP/IP using Telnet and the IP router is possible only if the TCP/IP
module is activated.
IP address
The IP address for the router may be entered here. The default address on delivery is
'0.0.0.0'.
If IP masquerading is used, this address takes on a special meaning in connection with
the Intranet address:
If the IP address is assigned to the router by the Internet provider by PPP, all computers
in the network linked by IP address and IP network mask are normally routed. These
computers can then also be accessed directly from the Internet.
IP-netmask The network mask belonging to the IP address must be entered here. The default setting
is 255.255.255.0 (class C network). A network mask of 255.255.255.255 means that there
is only one computer in this network (the router itself). This setting (an IP address
registered in the Internet with a fully assigned network mask) can be used for
masquerading via a raw IP access, such as that offered by the provider of the individual
network. With such an access an IP address is not assigned to the router by a PPP
negotiation, but it must have a fixed IP address registered in the Internet.
Intranet- A second IP address for the router may be entered here. This enables the router to be
address
used as a router for two logical IP networks and also this address has a specific meaning
with the use of IP masquerading:
In this case, all computers that are in the network linked by Intranet address and Intranet
mask are hidden behind the address assigned by the provider (or the Internet address (IP
address)).
The default address on delivery is '0.0.0.0'.
Intranet-mask The network mask belonging to the IP address must be entered here. The default setting
is 255.255.255.0 (class C network).
If neither an IP nor an Intranet address has been specified, the device responds to a
default IP address, the first three digits of which are identical to the first three digits of
the sending device XXX.XXX.XXX.YYY. The device can then be reached by dialing the IP
address XXX.XXX.XXX.254.
In the event that such an address already exists in the network, a different address must
be entered via outband configuration (terminal program).
If both an IP address and an Intranet address have been entered, the network defined by
an IP address and IP network mask must contain only workstations (i.e. no routers).
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