EWS UFS8000, Operating Manual, Page: 79 / 130

UFS8000 Ethernet 72
14.2.1. IP address of the modem (WAN)
The IP address of the particular modem on the internet can be obtained by inserting
http://www.whatismyip.com in the URL bar of the browser on a computer that is connected to the local
network “behind” the particular modem. A web page will appear with the IP address of the modem.
This address must be used to access the control via the internet. If this is done on, for example, PC-2
(see Figure 14.1), then the IP address “84.86.9.96” will be displayed. This IP address is not
adjustable.
14.2.2. IP address of the modem (LAN)
The modem is equipped with a specific IP address in the local network. This IP address can eventually
be modified, but this is not really common. This IP address can be found in the instruction manual of
the modem. The modem can subsequently be connected to a PC.
The IP address of the PC should be set so that it can communicate with the modem. To connect to the
modem, the IP address of the modem must be entered in the URL bar of the browser (for example,
Internet Explorer).
14.2.3. NAPT
A “NAPT Entry” (“Network address port translation”) is to be set in the modem. This will give access to
the control of the internet. The IP and port number of the control are specified in the “NAPT entry”.
See § 14.2.2 “IP address of the modem (LAN)” on page 72, how to make a connection between a PC
and the modem.
If you have two controls in the local network that should be accessible via the internet, they must
communicate via the internet through different ports. Standard communication is via port 80.
The modem will transmit the incoming messages (from the internet) directly to the control with a
specific IP address and port number in the local network.
Example with a Speedtouch 520i modem:
Open “Advanced” in the menu and click subsequently on “NAPT”. Make a “NAPT Entry” by clicking on
“New”.
Enter the IP address (in this
example: 10.0.0.4) and port
number (in this example: 80)
of the control that should be
accessible via the internet.
If several controls should be accessible via the internet, then one should make use of the ports. The
setting “Outside Port” should be set differently for each control. This port number should then be used
in the URL bar of the browser of the PC (also see the examples given in Figure 14.1).