ELSA LANCOM Business LC-4X00, Руководство пользователя

Страница: 229 / 276

Description of the menu options
ELSA LANCOM Business
R59
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:
쮿
Telnet server: the configuration interface based on the Telnet protocol
쮿
TFTP server: the configuration interface based on the TFT protocol
쮿
SNMP: the configuration interface based on the SNMP
Each of the maximum of 16 entries in the access list has the following structure:
Once an IP workstation with its IP address and the network mask 255.255.255.255 is
entered into the list, the internal functions of the router can only be accessed from this
computer. Any requests from devices with different IP addresses are ignored.
If a complete network has access enabled to an ELSA LANCOM, this can be done as
follows for a class C network:
With this entry all IP addresses in the class C network 192.234.222.0 are authorized to
use internal functions of the router.
DNS-default The entry DNS (Domain Name Server) is required to announce the name server
responsible for their own network for computers that have direct access via PPP to the
router.
IP-address IP-netmask
IP address of the authorized user (or user
circle) IP network mask of the user circle
IP-address IP-netmask
192.234.222.0 255.255.255.0