D-Link DFL-2500 User Guide - Page 72
Interfaces
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9 CHAPTER Interfaces Physical interfaces are the doorways of the network connections. It allows the network traffic to enter into or go out of the network areas with which it connects. In order to control the traffic on both in and out directions and protect the local network, security rules in the firewall is bound to all relevant interfaces. 9.1 Ethernet Ethernet is one of the Local Area Network (LAN) architectures served as the basis for the IEEE 802.3 standard, which specifies the physical and lower software layers. It is one of the most widely implemented LAN standards. This section presents the concepts of Ethernet interface. Some of the commonly used protocols that run on Ethernet are introduced in sections 9.2 VLAN and 9.4 PPPoE in this chapter, others like IPsec, PPTP, L2TP, and ARP are covered later in the document. 9.1.1 Ethernet Interfaces An Ethernet interface represents a physical Ethernet adapter used in the firewall. The configuration of an Ethernet interface involves the assignment of an IP address and other parameters, to make the interface accessible to the network layer. When installing a D-Link firewall, all supported Ethernet adapters in the 53