Q-See QSD6204 - Manual (Page 34)

Static verses dynamic addresses: You can access the DVR through a
static or dynamic IP address, however a dynamic address can change
from time to time. How often depends on your service provider. We
suggest
www.Dyndns.org or www.no-ip.com domain name service. If
you register your domain name for the DVR, you can use this service
to connect to your DVR without the need for a static or public IP
address. You do need to leave a computer attached to the router and
ON to be able to use this service, but it could help avoid the higher
cost of having a static address.
NETWORK
SETUP
-USER
SETUP
When a user connects to the DVR via the Internet, Internet
Explorer will prompt the user to enter a username and password.
There are two kinds of user, ADMIN and USER.
The default value for username and password of “USER” is
blank, Nothing. This allows the user to connect without username
or password.
However, in order to control the DVR, the user must login as
“ADMIN ”, and at that time must type the username and
Password set by this menu.
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