WebRelay-10 Users Manual
Installation and Setup
Brief Notes About DHCP
All devices on an IP network require an IP address. This is a unique address that identifies each
device on the network. DHCP (Dynamic Host Control Protocol) is a mechanism that automatically
assigns an IP address to a computer (or other devices) when it is connected to a network. This
eliminates the need to manually enter the IP address. When a computer is connected to the
network, another device on the network called a DHCP server detects the presence of the computer
and dynamically assigns the IP address to that computer. On many small networks, the DHCP
server is built into the router.
DHCP works well for "client" devices such as computers, but is not ideal for servers. This is because
servers usually don't initiate communications with other devices, but rather they wait for a request
from "clients." To make this request, the client must know the IP address of the server. If a server
gets its IP address dynamically, the IP address may not always be the same so client devices may
not be able to find the server. For this reason, servers usually use an IP address that is fixed and
does not change. The WebRelay-10 Plus™ is a server and manual IP address assignment is
usually recommended.
IP Address
Enter the IP address for WebRelay-10 in this field. The IP address is specific to the network where
WebRelay-10 will be installed, and must be obtained from the network administrator. For more
information on IP addresses and remotely accessing WebRelay-10 over the Internet, see
Appendix
C: Accessing WebRelay-10 Remotely Over the Internet
. The default setting for this field is
192.168.1.2.
Subnet Mask
The subnet mask defines the size of the local network. This must be obtained from the network
administrator. For additional information about sub-netting and IP networking, many tutorials are
available on the Internet. The default setting for this field is 255.255.255.0.
Gateway
This specifies the IP address of the gateway router. This must be obtained from the network
administrator. The default setting for this field is 192.168.1.1.
Preferred DNS Server
The IP address of the Primary DNS server is specified here. When DNS services are required, this
is the address that will be used. The default setting for this field is 192.168.1.1.
This field is only required when the following options are used:
-
Remote Services
(when server is specified by name and not IP address).
-
Sync time clock with remote NTP server
(when server name is specified by name and
not IP address).
-
Mail Server
(when server name is specified by name and not IP address).
Alternate DNS Server
This field is used to specify the IP address of a Secondary DNS server. This is used when
WebRelay-10 requires DNS services and the preferred DNS server is not available. The default
setting for this field is 192.168.1.1.
HTTP Port
The TCP port used for HTTP communications (web browser, xml, get commands) with WebRelay-
10 is specified here. The default setting for this field is 80, which is the standard HTTP port. It is
recommended that the port be left unchanged unless the user has an understanding of TCP/IP and
ports. For more information on TCP ports and IP addressing see
Appendix C: Accessing
WebRelay-10 Remotely Over the Internet
.
Speed
This option sets the data rate (clock rate) of the Ethernet port. Either
10 Mbps
or
100 Mbps
can be
selected. The
100 Mbps
option offers faster communications but the amount of data to and from
WebRelay-10 is so small that users will not likely notice much (if any) difference. When the
WebRelay-10 is set to
10 Mbps
, it draws less power and runs a little cooler, which may translate
into a longer product life. The default setting for this field is
10 Mbps
.
IT IS RECOMMENDED THAT THIS SETTING BE LEFT AT
10Mbps
UNLESS THE USER HAS A
SPECIFIC REASON TO USE
100Mbps
.
Xytronix Research & Design, Inc.
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