Web Server and Setup Pages
WebRelay Users Manual
3.1.2 Network Setup Page
The network parameters are changed on this page. Note that if multiple WebRelay units are used on the
same network, install one unit at a time and set the IP address of each unit before connecting the next
unit to the network. This avoids having multiple WebRelay units installed on the network with the same
factory default IP address at the same time.
It may be necessary to clear the arp cache each time you swap WebRelay units on the network (this is
because each unit has the same default IP address but a different mac address). This is done by typing
arp -d in the command prompt of a Windows computer (arp -d -a as super user on Apple OSX).
Also note that the unit must be power-cycled (power disconnected, then reconnected) before network
settings take effect. No other setup page requires power-cycling for the settings take effect.
IP Address
WebRelay requires a static IP address. This is a unique address that identifies WebRelay on the
network. Dynamic IP address assignment (DHCP) is not supported. The lack of dynamic IP addressing
support is intentional because dynamically changing the IP address would make it difficult for a client to
access the web server built into WebRelay. The IP address is specific to the network where WebRelay
will be installed, and must be obtained from the network administrator.
This guide is not meant to be a tutorial on IP addressing, however a few comments about IP addressing
are given here. If WebRelay will be used over the Internet, the IP address must be a routable address
assigned by the upstream Internet Service Provider (ISP).
In cases where the ISP only provides a single routable IP address for the entire network (this is typical
with ISPs such as cable providers), a proxy server (or gateway router) may be used. A proxy server
allows multiple devices to connect to the Internet using a single routable IP address. Many small routers
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