Appendix D: What Is Port Forwarding - Lorex LH120 Series Instruction Manual

Appendix D: What is Port Forwarding?

You need to enable port forwarding on your router to allow for external communications
with your system for the following port:
• 80 (HTTP port)
• 9000 (Client Port)
• 1025 (Mobile Connectivity Port)
NOTE: For added security, we strongly recommend changing HTTP port 80 on the system to
port
—the port must not blocked by your Internet service provider (ISP).
Computers, DVRs, and other devices inside your network can only communicate directly
with each other within the internal network. Computers and systems outside your network
cannot directly communicate with these devices. When a system on the internal network
needs to send or receive information from a system outside the network (i.e. from the
Internet), the information is sent to the router.
NETWORK EXAMPLE
Router
External IP
216.13.154.34
Internet
When a computer on the Internet needs to send data to your internal network, it sends this
data to the external IP address of the router. The router then needs to decide where this
data is to be sent to. This is where setting up Port Forwarding becomes important.
Port Forwarding tells the router which device on the internal network to send the data to.
When you set up port forwarding on your router, it takes the data from the "external IP
address:port number" and sends that data to an "internal IP address:port number" (i.e
Router External IP 216.13.154.34 to DVR Internal IP 192.168.0.3:80).
Router
Internal IP
192.168.0.1
Internal Network
Appendix D: What is Port Forwarding?
PC
Internal IP
192.168.0.2
DVR
Internal IP
192.168.0.3
any desired
99