ELSA Lancom DSL/10 Office, Руководство пользователя

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Description of the menu options
ELSA LANCOM DSL/10 Office
R32
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-
address
A second IP address for the router may be entered here. This enables the router to be
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).
Access-list The access to “internal functions” of the router may be controlled by an access list in
TCP/IP applications.
The configuration data of the device are protected by a password, however this is always
transferred in plain text, making it possible in principle to detect it and for any computer
to read the configuration or to delete it. In order to prevent this from happening, the
access list can be used to determine which computers or which networks can access the
configuration.
For reasons of consistency, the access control is based on all “internal functions“ of the
router. The term "internal functions" refers to the following:
K
Telnet server: the configuration interface based on the telnet protocol
K
TFTP server: the configuration interface based on the TFT protocol
K
SNMP: the configuration interface based on the SNMP