65
Configuration Examples
OpenCom 100 in a Serverless LAN
Install the TCP/IP network protocol
and a Web browser for every work-
station which is to have access to the
OpenCom 100 network features.
For notes on installing network
cards, refer to
DNS Name Resolution
In a serverless LAN, the internal DNS
name resolution is performed by the
OpenCom 100. If you type the string
“host.domain” into your browser, a
DNS request is sent to the
OpenCom 100 IP address. The
OpenCom 100 responds with the
correct IP address, so that the
Con-
figurator
home page can be called
up.
In a peer-to-peer network (Windows
network), the workstations each
have a name which is displayed in
the network environment. These
NetBIOS names can differ from the
DNS names assigned to the worksta-
tions by the OpenCom 100. The
OpenCom 100 is not visible in the
network environment.
Internet Access
If access to an ISP has been config-
ured on the OpenCom 100, the
OpenCom 100 can be operated as an
Internet access server without any
additional configuration of the
workstations. When you want to see
a Web page, you simply type the URL
(uniform resource locator; Internet
address; “http://...”) in your browser.
In a serverless LAN, the
OpenCom 100 is configured as a DNS
server and default gateway. The
workstation therefore sends its In-
ternet connection request to the
OpenCom 100.
In almost all cases, the request will
contain a DNS name which is un-
known in the internal network.
When you type a URL into your
browser, the OpenCom 100 receives
the request to find the correspond-
ing IP address. If the name is un-
known in the LAN, the request is for-
warded to an ISP’s external DNS
server.
Note:
Workstation PCs automati-
cally add a domain name to URLs
without a dot. You specify this do-
main name in the
Configurator
. For
example, if you have configured
“firm.co.uk” as the domain name, an
access request for “www.firm.co.uk”
will be interpreted as a local DNS re-
quest which does not lead to the es-
tablishment of an Internet connec-
tion. For this reason, you should
choose a name which is not used in
the Internet as the domain name
(“firm-opencom.co.uk” for example).
Summary of Contents for opencom 100
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Page 6: ...4 ...
Page 134: ...132 Index Notes ...