DETEWE OpenCom 130, User Manual

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Configuration Examples OpenCom 100 in a Serverless LAN
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the OpenCom 100 via DHCP (dynamic host configuration protocol). In this ope-
rating mode, an IP address space reserved for such networks is used:
Install the IP network protocol and a Web browser for every workstation which is
to have access to the OpenCom 100 network features.
8.3.1 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
Configurator 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 workstations by the OpenCom 100. The
OpenCom 100 is not visible in the network environment.
8.3.2 Internet Access
If access to an ISP has been configured 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 ser-
verless LAN, the OpenCom 100 is configured as a DNS server and default gateway.
The workstation therefore sends its Internet connection request to the
OpenCom 100.
In almost all cases, the request will contain a DNS name which is unknown in the
internal network. When you type a URL into your browser, the OpenCom 100
receives the request to find the corresponding IP address. If the name is unknown
in the LAN, the request is forwarded to an ISP’s external DNS server.
192.168.99.254 OpenCom 100 IP address
255.255.255.0 Network mask (class C network)
192.168.99.254 DNS server IP address
192.168.99.254 Default gateway IP address