D-Link DSL-520B User Manual

42D-Link DSL-520B ADSL2+ Modem User Manual
Section 7 - Device Info
Additionally,portforwardingenablesyoutoredirecttractoadierentportinsteadoftheonetowhichitwasdesignated.
Forexample,ifyouhaveaWebserverrunningonyourPConport8080andyouwanttograntaccesstothisservertoanyone
whoaccessesDSLrouterviaHTTP.Toaccomplishthis,doasfollows:
Step 1
DeneaportforwardingrulefortheHTTPservice,withthePCIPorhostname.
Step 2
Specify 8080 in the Forward to Port eld.
AllincomingHTTPtracisforwardedtothePCrunningtheWebserveronport8080.Whensettingaportforwardingservice,
ensurethattheportisnotusedbyanotherapplication,whichmaystopfunctioning.AcommonexampleiswhenusingSIP
signalinginVoiceoverIP,theportusedbythegatewayVoIPapplication(5060)isthesameport,onwhichportforwardingis
set for LAN SIP agents.
Note: Some applications, such as FTP, TFTP, PPTP and H323, require the support of special specic application level gateway (ALG)
modules in order to work inside the home network. Data packets associated with these applications contain information that allows
them to be routed correctly. An ALG is needed to handle these packets and ensure that they reach their intended destinations. DSL
routerisequippedwitharobustlistofALGmodulesinordertoenablemaximumfunctionalityinthehomenetwork.TheALGis
automatically assigned based on the destination port.
Virtual servers are congured for this purpose.

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