D-Link DSL-520B User Manual

44D-Link DSL-520B ADSL2+ Modem User Manual
Section 7 - Device Info
DMZ Host
Thedemilitarized(DMZ)hostfeatureallowsonelocalcomputertobeexposedtotheInternet.Thisfunctionisapplicablefor:
• Userswhowanttouseaspecial-purposeInternetservice,suchasanon-linegameorvideoconferencingprogram,thatis
not in the port forwarding list and for which no port range information is available.
• Userswhoarenotconcernedwithsecurityandwishtoexposeonecomputertoallserviceswithoutrestriction.
Note: A DMZ host is not protected by the rewall and may be vulnerable to attack. This may also put other computers in the home
network at risk. Hence, when designating a DMZ host, you must consider the security implications and and take the appropriate
precautions.
YoucansetupaclientinyourlocalnetworkasaDMZhost.Yourdevicethenforwardsallincomingdatatracfromthe
Internettothisclient.Youcan,forexample,operateyourownWebserverononeoftheclientsinyourlocalnetworkandmake
itaccessibletoInternetusers.Astheexposedhost,thelocalclientisdirectlyvisibletotheInternetandthereforeparticularly
vulnerabletoattacks(forexample,hackerattacks).Enablethisfunctiononlywhennecessary(forexample,tooperateaWeb
server)andwhenotherfunctions(forexample,portforwarding)areinadequate.Inthiscase,youshouldtakeappropriate
measures for the clients concerned.
Note:OnlyonePCperpublicIPaddresscanbesetupasanexposedhost.

D-Link DSL-520B Specifications

Data Transfer Rates

G.dmt full rate downstream	up to 8 Mbps
G.dmt full rate upstream	up to 1 Mbps
G.lite downstream	up to 1.5 Mbps
G.lite upstream	up to 512 Kbps
G.dmt.bis full rate downstream	up to 12 Mbps
G.dmt.bis full rate upstream	up to 12 Mbps
ADSL full rate downstream	up to 24 Mbps
ADSL full rate upstream	up to 1 Mbps

Interfaces

ADSL interface	RJ-11 connector
LAN interface	RJ-45 port
Ethernet	10/100BASE-T