D-Link DSL-504G, Руководство пользователя

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DSL-504G ADSL Router User’s Guide
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NAT
Click on the NAT menu button to display the NAT and DMZ menu. This menu allows you to enable and disable
Network Address Translation (NAT) system wide. Most users will leave the default NAT setting,
Enabled . If
NAT is Disabled, the DSL-504G will function essentially as a invisible bridge. Any LAN IP addresses will be
readily visible to properly equipped agents on the WAN. If you are using multiple virtual circuits, NAT will be
disabled for all PVCs. Special arrangements will be required if NAT is disabled and you want to support multiple
IP addresses on your private LAN. You may be able to disable NAT if you are using DHCP Relay service from
your ISP, but check with the ISP before doing this.
DMZ
Since some applications are not compatible with NAT, the Router supports use of a DMZ IP address for a single
host on the LAN. This IP address is not protected by NAT and will therefore be visible to agents on the Internet
with the right type of software. Keep in mind that any client PC in the DMZ will be exposed to various types of
security risks. If you use the DMZ, take measures (such as client-based virus protection) to protect the remaining
client PCs on your LAN from possible contamination through the DMZ.
Figure 4- 2. DMZ IP address configuration
To designate a DMZ IP address, type in the IP Address of the server or device on your LAN and click the
Apply button. It will be necessary to save the settings and reboot the Router before the DMZ is activated. See
Save Router Configuration Settings below.