Configuration Examples OpenCom 510 in a Serverless LAN102the OpenCom 510 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 isto have access to the OpenCom 510 network features.9.3.1 DNS Name ResolutionIn a serverless LAN, the internal DNS name resolution is performed by theOpenCom 510. If you type the string “host.domain” into your browser, a DNSrequest is sent to the OpenCom 510 IP address. The OpenCom 510 responds withthe 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 namewhich is displayed in the network environment. These NetBIOS names can differfrom the DNS names assigned to the workstations by the OpenCom 510. TheOpenCom 510 is not visible in the network environment.9.3.2 Internet AccessIf access to an ISP has been configured on the OpenCom 510, the OpenCom 510can be operated as an Internet access server without any additional configurationof 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 510 is configured as a DNS server and default gateway.The workstation therefore sends its Internet connection request to theOpenCom 510.In almost all cases, the request will contain a DNS name which is unknown in theinternal network. When you type a URL into your browser, the OpenCom 510receives the request to find the corresponding IP address. If the name is unknownin the LAN, the request is forwarded to an ISP’s external DNS server.192.168.99.254 OpenCom 510 IP address255.255.255.0 Network mask (class C network)192.168.99.254 DNS server IP address192.168.99.254 Default gateway IP address
