ELSA Cable User Manual
Page 101
Description of the menu options
ELSA MicroLink Cable
R93
If such an IP address already exists in the network, shut down the device using the
address for the duration of the configuration and assign a different, free LAN IP address
to the cable modem.
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:
Telnet server: The configuration interface based on the Telnet protocol
TFTP server: The configuration interface based on the TFT protocol
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 a
ELSA MicroLink Cable, 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.
ARP table
This option allows you to display the ARP table (ARP cache), which is managed
automatically for the purpose of mapping IP addresses onto physical terminal addresses.
Individual entries can be removed from this table but no new entries can be entered
manually.
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