WebRelay-10 Users Manual
Installation and Setup
IP Filter Range 1:
192.168.1.0
192.168.1.255
IP Filter Range 2:
10.143.100.32
10.143.100.32
Note: The address specified for the Remote Services server (if applicable) is automatically allowed
through the firewall no matter how this is set.
Remote Services
Remote Services initiates an outgoing connection to a server at a remote location. This can be used in
an environment where a web server on the Internet provides a custom web page to WebRelay-10 and
other ControlByWeb products. Users access WebRelay-10 through the web server rather than
communicating directly with it. This method is sometimes referred to as “web services” and allows
programmers to create powerful, custom web pages to multiple devices using the web programming
languages of their choice.
Remote Services initiates the connection to the external web server (rather than the web server initiating
communications to WebRelay-10). This has two main benefits. First, the web server does not need to
know the IP address of WebRelay-10. This means that WebRelay-10 can get its IP address dynamically
from a DHCP server, simplifying the installation. Second, since the connection from WebRelay-10 is
outgoing, rather than incoming, the local router on the network where WebRelay-10 resides doesn't
need to be configured to forward sockets. This also simplifies the installation. Since the router
configuration is not modified, the risk of compromising security on the local network is eliminated. For
more information about the
Remote Services see Appendix E: External Server and Remote
Services
.
SNMP
Simple Network Management Protocol (SNMP) is used to manage and administer network devices.
WebRelay-10 supports SNMP V1.0 and can be configured here. Using SNMP, the input and relay states
of WebRelay-10 can be read as well as some basic information about the device. See
Appendix F:
SNMP Requests
for information about how to request information from WebRelay-10 using an SNMP
manager, as well as where to find MIB files for WebRelay-10.
Note: The read and write community strings used for SNMP are actually the Control Password found on
the Password setup tab (see Section 2.4.4). If the Control Password is disabled, then WebRelay-10
does not check for the community string when issued a Get or GetNext request from the SNMP
manager.
Xytronix Research & Design, Inc.
page 27
