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IP auto configuration
With this option you can control if the U8/16-IP should obtain its network settings from a DHCP
or BOOTP server. For DHCP, select dhcp, and for BOOTP select bootp. If you choose none
then IP auto configuration is disabled.
IP address
IP address in the usual dot notation.
Subnet Mask
The net mask of the local network.
Gateway IP address
In case the U8/16-IP is accessible from networks other than the local one, this IP address must
be set to the local network router's IP address.
Primary DNS Server IP Address
IP address of the primary Domain Name Server in dot notation. This option may be left empty;
however, the U8/16-IP will not be able to perform name resolution.
Secondary DNS Server IP Address
IP address of the secondary Domain Name Server in dot notation. It will be used in case the
Primary DNS Server cannot be contacted.
Remote Console and HTTPS port
Port number at which the U8/16-IP’s Remote Console server and HTTPS server are listening. If
left empty the default value will be used.
HTTP port
Port number at which the U8/16-IP’s HTTP server is listening. If left empty the default value will
be used.
Telnet port
Port number at which the U8/16-IP’s Telnet server is listening. If left empty the default value will
be used.
Bandwidth limitation
The maximum network traffic generated through the U8/16-IP’s Ethernet device. Value in Kbit/s.
Enable Telnet access
Set this option to allow access to ARA express using the Telnet Gateway (see the Section
called Telnet Console on page 36.)
Disable Setup Protocol
Enable this option to exclude the U8/16-IP from the setup protocol.
Section 5 IP Access Configuration & Operation
59
Dynamic DNS
A freely available Dynamic DNS service (dyndns.org) can be used in the following scenario (see
illustration below)
The U8/16-IP is reachable via the IP address of the DSL router, which is dynamically assigned
by the provider. Since the administrator does not know the IP address assigned by the provider,
the U8/16-IP connects to a special dynamic DNS server in regular intervals and registers its IP
address there. The administrator may contact this server as well and pick up the same IP
address belonging to his device.
The administrator has to register a U8/16-IP that is supposed to take part in the service with the
Dynamic DNS Server and assign a certain hostname to it. He will get a nickname and a
password in return. This account information, together with the hostname, is needed in order to
determine the IP address of the registered U8/16-IP.
You have to perform the following steps in order to enable Dynamic DNS:
Make sure that the LAN interface of the U8/16-IP is properly configured.
Open the Dynamic DNS Settings configuration dialog
Enable Dynamic DNS and change the settings according to your needs (see the next page).
