What is port forwarding, and how does it work
to enable remote access to security cameras and other devices on the internet? These are
the questions we will answer on this video. What is port forwarding? Port forwarding is
the act of configuring a router to make a computer or network device that is connected
to it accessible to other computers and network devices outside the local network. In other
words, when enable port forwarding for a device, you are turning on remote internet access
for it. Here is an example of how it works. Let’s say you have an IP camera connected
to a router, and there is also a computer connected to the same router. The router assigns
the camera and a computer an internal IP address so that you can communicate with each other
on the local area network. Local IP addresses will almost always start
with 192. or 10. The router is connected to a cable modem to provide internet access to
the computers on the network. Modems are also assigned an IP address, but they are different
than the local IP address assigned by the router. The internet service provider assigns
a modem a public IP address. The public IP address is what enables communication between
a local network and devices on the internet. By default, most routers have a firewall enabled
so that no outside internet traffic can enter the local network. This is why port forwarding
is needed if you want to enable remote access to devices such as IP cameras.
When you set up port forwarding, a hole is essentially poked through the firewall, which
allows internet traffic inside the network, but only on a specific port that you forwarded.
In this example, our IP camera is running on port 7,000. If we set up port forwarding
on the router, and point port 7,000 to the IP camera, outside traffic will now be allowed
inside the network on that particular port. The router will forward the communication
to the IP camera when it comes in over the internet. Port forwarding works exactly the
same way for network DVRs and any other type of networkable device.
Here’s how this port forwarding will be set up using the Cisco Linksys router. I’m
logged in to the web interface of the router now, and I go into the security settings.
In the security settings, there’s a section called Apps and Gaming. Then there’s a subsection
called Single Port Forwarding. This entry right here is for the IP camera that I use
in the example. You can see that we forwarded port 7,000 to the internal IP address of the
IP camera. I hope this video was helpful in explaining
the concepts used in port forwarding. For additional information and links to resources
and tools that can help you set up and troubleshoot port forwarding rules on your own, please
visit www.cctvcamerapros.com/portforwarding. Thank you for watching.