D-Link DFL-100 — понимание функций маршрутизаторов и настройки сети [10/97]

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features of the DFL-100. Computers and devices connected to the DMZ port

will not have the level of protection that the Local Area Network ports can

provide, however. It is recommended that computers and devices connected

to the DFL-100’s DMZ port have some type of firewall software installed

and running to provide these devices with at least some level of protection

from unwanted intrusions from the Internet.

The Wide Area Network (WAN) side of the DFL-100 is anything connected

to the WAN port. This is normally an Ethernet connection to a Cable or DSL

modem that, in turn, provides a connection to the Internet. There are three

different methods for your ISP to provide the necessary network address

information to your DFL-100.

It can be useful when configuring your DFL-100 Firewall/VPN Router to

think of the LAN side (all computers or devices connected to the three LAN

ports or the DMZ port) and the WAN side (all computers or devices

connected to the WAN port). The WAN side of the router is connected to

some device that ultimately allows a connection to the Internet, while the

LAN side is connected to your computers or other network devices (such as a

switch or hub) that ultimately allows users access to the both the Internet and

any other devices on your LAN (such as a printer or scanner).

The network information (including the IP address) required by the WAN

side of the DFL-100 is either obtained automatically from your ISP (or other

network device on the WAN side) or is entered manually. The DFL-100

allows three methods for this information to be obtained, as follows:

Dynamic − your ISP uses the Dynamic Host Configuration Protocol (DHCP)

to provide the network information. Some ISP’s may require you to enter an

assigned Host Name, as well.

Static IP Address − your ISP assigns you an IP address that never changes.

This is more common in businesses that lease dedicated connections. If your

ISP uses this type of connection, you must manually enter the assigned IP

address, subnet mask, default gateway address, and primary and secondary

DNS addresses. This information will be provided by your ISP.