ELSA Cable manual Description of the menu options R93

Description of the menu options 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:

KTelnet server: The configuration interface based on the Telnet protocol

KTFTP server: The configuration interface based on the TFT protocol

KSNMP: the configuration interface based on the SNMP

Each of the maximum of 16 entries in the access list has the following structure:

IP-address	IP netmask
IP address of the authorized user (or user	IP network mask of the user circle
circle)

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:

IP-address

192.234.222.0

IP netmask

255.255.255.0

	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.

ELSA MicroLink Cable