User`s manual

SVR-500 Series
Network Video Recorder
User’s Manual
English
48
3.1.2 DDNS Service
DDNS, which stands for “Dynamic DNS”, is a method, protocol, or
network service that provides the capability for a networked device,
such as a router or computer system (in this case, the NVR) using the
Internet Protocol Suite, to notify a domain name server to change, in
realtime,theactiveDNScongurationofitsconguredhostnames,
addresses or other information stored in DNS.
A popular application of dynamic DNS is to provide a residential user’s
Internet gateway that has a variable, often changing, IP address with
a well known hostname resolvable through standard DNS queries.
This is useful if the NVR is placed on the Internet with a dynamic
public IP, which once the DDNS is properly setup, users can access
the NVR remotely with the DDNS domain name without worrying if
the IP hs changed or not.
The NVR currently only works with free DDNS service provided by
“DynDNS”.Formoreinformation,pleasegotowww.dyndns.com
IftheNVRisplacedbehindarouterorInternetgateway,pleasemake
sureportforwardingforport80isconguredontherouterorthegat-
wayinorderfortheDDNSfunctiontoproperlyregisterwiththeservice.
It’s often suggested to use the DDNS function in the router/
gateway for such case instead.
OnceyouhavetheDDNSfunctionsuccessfullyupandrunning,please
DONOTforgettocongureportforwardingfortheNVRwebport(de-
fault80)andthestreamingport(default9877)intherouter/gateway
forremoteviewing.Youcanthentypeinhttp://yourddnsdomaininthe
browsertoaccesstheNVRremotelyforliveview.
Please make sure a validDNS server has been congured under the
“NetworkSetting”pageinorderforthisfunctiontoworkproperly.