Instruction manual

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essentially allows only the computer that issued the ping command to
communicate with the unit. From this computer, then, the user must also
access the unit’s web page via a web browser, or its console via a telnet
session, in order to write the IP address to the filesystem. Until the new IP
address is written to the filesystem, the IP address change is only temporary. If
the unit loses power or is otherwise reset prior to submitting/setting the new IP
address, the previous IP address and subnet mask settings will return.
Note that if the IP address is to be modified via the unit’s web page, that
network elements such as HTTP proxy servers may relay the web page request
for the configuring computer. The unit, seeing the HTTP request from a
computer other than that which performed the initial “ping”, will ignore such a
request. Therefore, be sure to bypass or disable any proxy servers at least
temporarily when using this configuration method.
For security reasons, once the ARP method of configuration has been
successfully completed (i.e. the IP address has been written to the filesystem),
the ARP method of configuration will be disabled, and all future attempts at
using this method will be ignored by the unit. It is possible, however, to re-
enable the ARP method via a console command (refer to section 14.3).
13.2 Console Method
The console method of configuration is achieved via a text-based console
interface, accessible over the RS232 port and a telnet interface. The RS232
console is accessed by connecting the port to a computer’s serial (COM) port,
and then running a terminal emulation program, such as Windows®
HyperTerminal. If the ARP method of initial configuration is not used, then the
RS232 console must be accessed. More information about the console
interface and its commands can be found in section 14.