Delta Embedded DVR User Manual download pdf (Page 68)

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DIAGRAM6‐2DNS

ThecomputerwillanalysesthedomainnameconfiguratedinDVR,andreturntothecurrentIP,asthe

pictureshowsunderlinedinred.WhentheIPcorrespondtotheembeddedDVR’sIPinPublicinternet,

itmeanstheDDNSissettingright.Iftheyarenot,pleasecheckthenetworkconnectionofembedded

DVRandDDNSinformation.

6.2. PORTMAPPING

Portmappingismappingaportofoutsidewebhost’sIPaddresstoamachineinsideweb,andprovide

theservice.WhenuserconnectstotheportoftheIP,theserverwillautomaticallymaptherequestto

thecorrespondingmachineinsideLAN.

Withthefunctionofportmapping,wecanmapmanyportsofamachine’sIPaddresstodifferent

machines’differentportsinsideweb.Theportmappingcanalsohaveotherspecialagentfunctions,

likePOP,SMTP,TELNET,etc.

Theoretically,itcanprovidemorethansixtythousandports.

Forexample,ifwewanttomapawebserverwhichhasanIPaddressof192.168.111.10,wejustneed

toinputtheIPaddressandTCPport80intotheportmappingchartoftherouter.

Therearetwowaystomaptheport:UPnPfunctionautomaticallymapandmodifytherouter’sport

mappingchartbymanual. 

6.2.1. UPNPFUNCTION

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Delta Embedded DVR User Manual Page 68