IP Addresses for Internet CCTV Beginners, Part 2

January 7th, 2021

In part 1 of this series on IP addresses in wireless internet CCTV, we looked at how most home networks share a small number of identical IP addresses, so your neighbor’s laptop could easily have precisely the same address as your own laptop or your internet CCTV camera!  Here in part 2, were going to show why these duplicate addresses don’t cause chaos when messages are sent across the internet.

Let us use an example to show how devices can communicate successfully even if they share the same address.  Say your laptop has an IP address of and your wireless internet CCTV camera has an address of  Let’s also say that your neighbor’s laptop has, by coincidence, the same address as your laptop:  Before we go any further, you may be thinking that the odds of this are infinitesimally low.  Well, actually they are not.  This is because most home networks have IP addresses that tend to be in the same few ranges, often from to or from to  Back to our example, this means that when your neighbor tries to connect to your wireless internet CCTV camera (assuming you have given him the password), we would have a problem if only the home networks’ IP addresses were used, because your neighbor’s laptop on would send a message to your camera at, but when the camera replies, would the reply go to back to your neighbor’s laptop on, or your laptop on, or someone else’s computer somewhere else in the world that also happens to have a address?  Clearly, this would not work, and that’s why the internet has its own set of IP addresses that are universally unique.  Continuing the above example, when your neighbor’s laptop at in his network sends a message to your internet camera, first of all, the message will reach his router, which wraps it up so it is labeled with your neighbor’s single unique <em>internet</em> IP address, say, and sends it to your network’s unique <em>internet</em> address, say  Note that the household or “internal” address of your neighbor’s laptop,, is never sent across the internet at all.  Now, when the message reaches your house, more specifically your router, the router hands it to your wireless internet camera.  In this way, home networks throughout the world can reuse the same IP addresses.

There is something missing from this explanation that you may have spotted.  How does your router “know” that a message coming in is for your internet CCTV camera if that camera’s IP address of is not sent in the message?  The answer is that your camera is allocated a “port” number, which is sent with the message.  So your neighbor, when logging into your camera, would type not just your internet IP address of into his browser address bar, but rather, where 8765 is the port number allocated to your camera.  Your router would need to be set up to know that any message coming in with a port number of 8765 is to be “forwarded” to the camera.  This is what we know as “port forwarding”, which is really outside the scope of this article.

IP address theory is a complex business, but when it comes to working with wireless internet CCTV, you only need to know the basics, and hopefully, this series of articles has helped to achieve that. If you need anymore help please contact your local provider in Chico CA.


What Our Customers Say

"I had the Alibi system installed several years ago. It has functioned flawlessly. The image quality is exellent both night and day and in all weather conditions. I particularly like the replay (which can be set at various speeds) and zoom functions of the system. Tech support from Crimefreeliving has been excellent. I have received quick responses to questions, and timely home visits — as when I changed IP carriers and my Alibi system needed to be reset. I have recommended Crimefreeliving to several friends."


"As a small business owner here in Chico we definitely saw the need for video surveillance. After expressing our needs and concerns Tim did an excellent job getting us set up with the set up with the appropriate equipment. He really took the time to address our concerns in a very friendly, professional and knowledgeable manner. I highly recommend Tim for all of your business and residential video surveillance needs."

Ron H., Owner/Auto Doctor

"I have to say I love having my security cameras at my home. Tim Truby did a wonderful job of installing the five cameras. He is very neat and cleaned everything up after the installation. He explained to me how to operate the monitor, my phone and IPad. However, I have had to call Tim because I'm not tech savvy and forget what he has told me. He usually just helps me over the phone and then all is well. I'm 80 years old and enjoy the comfort of knowing I have these security cameras."


"Tim Truby designed and installed a 32 camera system for us here at the Butte County Mosquito and Vector Control District. We had received several other quotes from security system vendors, but Tim’s quote was the least expensive. Tim also installed the system quickly and has always been available when we needed him. We are very happy with our security camera system and we can highly recommend Tim Truby for all of your surveillance system needs."

D. Weseman, Butte County Mosquito and Vector Control District

Crime Free Living updated our old video system with a new 16 Channel HD Alibi Video Security System. The old system had been added onto by different installers which resulted in a cabling mess. There were cables that worked and cables that went nowhere. It was a mess. Tim sorted it all out and installed cameras that are very clear. He also installed a monitor for our cashiers to watch hidden areas, a monitor to watch the entry door, and a monitor that allows employees to watch the outside parking and gas pump area. All work was done on time and very professional! Will always recommend Tim and Crime Free Living.

S. AM PM Chico Arco Station

"I had Tim install an Alibi Video Security System at my residence and a couple business locations. The remote view option is invaluable to absentee owners or anyone who travels a lot. The clarity and quality of the cameras have allowed for viewing employee theft. The evidence provided from the HD video cameras was fantastic! Tim was professional and provided extra value from his law enforcement background."

J. Folsom Arco Station

"Tim, I want to thank you again for doing such a fantastic job on installing a wireless IP security camera system at our dream home. The extra time that you took to hide wires, and install a clean, professional system is much appreciated. I still can’t believe the clarity, quality, and ease of use of this new system. I wished that I would have met you before our original inferior system was installed by another company. Now, whether I am at home, or monitoring the system from around the world, I know that my home and family are safe and sound."

John M.

"In April of 2017, my husband and I made a phone call to Crime Free Living that turned out to be a smart and wise decision. Amazingly, in just a few hours, Tim installed four Dome Security Cameras, weatherproof enclosures, and hooked up into our home a 23" Full HD Widescreen Security Monitor. Even more than his professional expertise was the time spent with us in making sure that this system was working correctly and properly installed on our phones so that anywhere in our travels we can monitor our new home in Magalia."

Tieka and Don S.

"I have been using Crime Free Living for the last couple years ar work and at home and I really recommend this product. Tim is a very good service provider. If he can't figure it out, he's got good tech support with the system that he offers."

Gary D.

"I have known Tim for over 10 years. To date, Time with Crime Free Living has installed two separate surveillance systems for my company. With each system, Tim has listened to my needs and custom dsigned surveillance systems for my specific needs and within my budget. The equipment used is always state of the art, the workmanship is top notch, and Tim is the example of trustworthy. I would recommend him for any job."

Steve D., Down Range Indoor Training Center

images Certifications & Training

With 16 years of experience in law enforcement, Tim Truby, CEO, is fully certified in video surveillance and training.

  • Certified Advanced Crime Prevention Specialist
  • Academy Instructor Certification
  • California POST Certification in Specialized Surveillance Equipment
  • California POST Certification in Basic Crime Prevention
    • Advanced Crime Prevention through Environmental Design
    • Certified Alibi Security Dealer
    • Enhanced Risk and Threat Assessment (FEMA)
    • Incident Command System (100 & 200)
    • Certified Cognitech Video Forensic Investigator
    • Neighborhood Watch Toolkit Trainer
    • Computer Crimes/Investigations
    • Domestic Crisis for Crisis Negotiators