HOW-TO: Set up DVR Computer to be accessible from behind a
Step One - Configuring the DVR Computer to use a static
internal IP address.
The DVR Computer is setup, by default, to use an IP address
assigned to it from a DHCP (Dynamic Host Configuration Protocol) server, with
the key word being dynamic. If you setup port forwarding to a device that is
using a dynamic IP address, there is a good possibility that the IP address may
change in the future (due to computers/DVR being rebooted, power outages, etc.)
Assigning a static internal IP address will resolve this problem.
Either Minimize or Close the DVR software before continuing.
1) From the DVR computer, connected to the router, open a
command prompt window.
a. Click on the Windows Start button.
b. Click on RUN.
c. In the text box next to Open, type in CMD and click OK.
2) In the Command Prompt window, type in IPCONFIG /ALL and
then press Enter.
You should see something similar like the following:
3) Write down the information for the following items from
your command prompt window:
DNS Server #1:
DNS Server #2:
Some of the above information will be used in the next
4) Click on the Windows Start button again and then click on
5) When the Windows Control Panel opens, look for and click
on "Network and Internet Connections".
6) Next, look under the section "pick a Control Panel
icon and click on "Network Connections".
7) Right click on "Local Area Connection" and
click on Properties from the popup menu.
8) When the "Local Area Connection Properties"
appears, highlight "Internet Protocol" by clicking on it (do NOT uncheck
the box). And then click on the Properties button.
9) Click on the radio button next to "Use the following
10) Since the default IP schema for the majority of routers
is 192.168.1.xxx, set the IP address for the DVR Computer to 192.168.1.200 If
the schema for your router is different, set the first three set of numbers to
match your network schema, but change the ending set to 200. For example. if
the IP address written down in step 3 was 10.10.1.150, then the schema is
10.10.1.xxx and you would need to set the IP address to be 10.10.1.200.
11) Set the GATEWAY, SUBNET, and DNS to the same address that
was written down in step 3.
12) Once the IP address and other information has been
entered in, click OK on both the "Internet Protocol" properties and
"Local Area Connection Properties" windows.
Step Two – Configuring your router.
For you to be able to view your cameras via the Internet,
your router/modem will have to be setup to allow incoming web page requests to
pass through to the DVR Computer. Presently, your router is set up to block
traffic from the outside (Internet) from getting into your internal network.
This is a good thing, as your router/firewall will help protect your network
from unwanted intruders. What we are going to do is create a small pinhole in
your firewall by opening a couple of ports to the DVR Computer. These pinholes
will allow you to view your cameras remotely via the Internet.
Use the link below to find the make and model of your
router. It will have step-by-step instructions on configuring some of
routers/firewalls out on the market today:
If the router is not listed, please go to the following page
and see if the router is listed there:
If so, click on the link for the router, click on "skip advertisement..", and then click on
HTTP on the next page.
Both guides show how to forward traffic for the web server
(port 80). This guide can be used to forward the additional ports. Below is a
list of ports used by the DVR software and remote applications:
Remote Console(CM3000) - Port 5550
Webcam/Webserver - Port 80
2-Way Audio - Port 9999
Remote Control (CM3000) - Port 5555
Aver's DDNS service - 53/1053*
Note: With the
exception of the DDNS service, all of the ports can be changed via the Network
Setup screen in the DVR software. Only the "Webcam/Webserver" and
"Remote Console(CM3000)" are necessary to be forwarded for remote
viewing via IE web browser.
IMPORTANT: The DVR Computer uses port 80 for serving the
web page and video. Some ISPs (Internet Service Providers) block inbound traffic
for port 80 along with other ports. You can to set the DVR Computer's WebViewer
port to a different port number, such as 81 or 90. If the WebViewer port is changed, you will
need to include the new port number at the end of the IP address, preceded by a
For example, if the IP address is set to 192.168.1.200 and
the WebViewer port was changed to 90, then you need to type in the following in
the address bar:
The DVR Computer should now be accessible from across the
Internet once the port is forwarded through the router/modem. You can go to http://www.whatismyip.com which will display
your external IP address. And then using that IP address, you can enter that in
to an Internet Explorer web browser to access it remotely. NOTE(s): Some
routers will not allow a request to originate from the LAN and then come back
in to the WAN/LAN due the way NAT is implemented in the router itself. Meaning
that if you try to use the external IP address to access the DVR, from a
computer behind the router, it may not work. In which case, you will need to
use the internal (192.168.1.200) address to access it while on the network. And
then from a remote location, use the external IP address.
You may wish to allow our TechString.com service department
remote into your network and set up your DVR and router for you. TechString is
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will securely remote into your DVR via the Internet. Most basic configurations
take approx. 25~45 minutes.