Through this network access, the configuration can access of each network card detected by the system and can select between a static configuration (manually configured), dynamic (DHCP configuration), VLAN (802.1Q) trunk, PPoE or bridged. In addition, each interface can define to be External if it is connected to an external network, such as the Internet. In order to apply stricter firewall policies, the interface is considered internal if the firewalls are not applied, connected to a local network. When an interface to serve DHCP is been configured, not only the IP address are been configured, but also the DNS servers and gateway. This is usual for hosts within the local network or for external interfaces connected to the ADSL routers. If the server is connected to one or more VLAN networks, the Trunk (802.11q) will be selected. Once selected, using this method many interfaces can be created associated to the defined tag, and consider them as if they were real interfaces. The VLAN network infrastructure is allows segmenting the local network to improve performance and security, without the need to invest in hardware that would usually be necessary to create each segment.
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