Samsung SNP-6321H Network Setup Manual page 9

If the network environment makes it difficult to configure an IP for the
network camera in a typical way:
As shown in the image below, if two or more routers are located at the upper layer of the network camera, it will
generally be impossible to configure the network camera.
In this environment, it is necessary to convert the router (2) into a general hub equipment (by turning off the
DHCP function in the Router Setup menu so that the IP addresses of the router (1) and (2) do not crash with
each other to make the router (2) operates as it were a general hub equipment) or double port forwarding of
the routers (1) and (2).
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It is difficult to change and configure the network, so it is recommended to ask the network administrator of the site to
replace router (2) with a general hub, and connect the network camera.
EX1)
DDNS
Server
Local monitoring PC
EX2)
DDNS
Server
Local monitoring PC
External remote
Internet
monitoring PC
Modem
Router(1)
Router(2)
...
Network camera 1
Internet
Modem
Router(1)
Router(2)
...
Network camera 1
Network camera n
External remote
monitoring PC
Network camera n
English _9