What is the Operating System of a DVR and How does a CCTV System Work?


The majority of DVRs work on the Linux operating system which is also in NVRs and IP cameras. The Linux operating system eventually became very popular in the entire IT industries because of the possibility of working in any devices and servers developed by manufacturers around the world. The Linux operating system has central core as well as several other modules which can be further removed in order to make it leaner. Eventually, if you have a deeper understanding of the Linux operating system as well as on the features and functionalities of IP cameras, you can protect your surveillance systems from being hacked along with dvr hacked and IP systems attacked.

There are different components of the CCTV system and several devices in the entire IP system which ultimately interact with each other. In an IP network the relationship between the devices is called client-server. Eventually, there is a server which provides various services and the clients who use those services. You can find various types of servers in a CCTV system such as DVRs, NVRs, IP cameras, recording servers, video analysis servers, encoders, access control servers etc.

Similarly, the different types of clients in an IP system are laptops, computers, tablets, cell phones, NVRs, access control, recording servers, decoders, control interface etc. However, the recording servers, as well as the NVRs, can be clients too depending upon the architecture of the CCTV. They can be servers when they provide videos to the computers with monitoring software whereas they can be functioning as clients when they connect to an IP camera and further request streaming videos in order to record.

In this context, there are numerous network vulnerabilities in the entire IP system beginning from simple attack to  devastating and advanced exploitation performed by an evil attacker. Most common attacks on DVR, NVR or IP cameras are man-in-the-middle password interception, dictionary attacks where the hacker normally tries a sequence of words that are like passwords, brute-force attacks where the attackers try several types possible passwords, taking the chances by identifying and exploiting the vulnerabilities in services like WebServer, denial of services attack etc. Similarly, most hacking-related vulnerabilities include social engineering which is the hackers getting sensitive information from other employees who are in the network, intrusion of viruses which are specially created for the devices incorporated in the IP system, by scanning and using the manufacturer’s default passwords, former employ or technician or other people who were incorporated in the network and who have sensitive information about the network etc.

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