What is a deep packet inspection?
The Inspection of the Deep Packet (DPI) is a method of control and analysis of data in the computer network. Information about type, source and data targets DPI looks inside the packets. This type of network monitoring can be used to detect malicious software before it reaches the target computer and prefers certain types of traffic. Governments, large corporations, Internet service providers (ISP) and security companies all use a deep packet inspection for different purposes. Packet is similar to a piece of mail in the envelope; It contains headers that determine the target and return address, with useful data inside the packet itself. When packets travel over the network, they can be routed through many different devices, as well as a piece of mail passing through different places of mail. Normally, do not only work on the packet headers. However, the entire packet is examined in devices using a deep packet inspection.
Packetscan be analyzed either in reillegally, or could be captured and analyzed later, practice known as deep trapping of packets or DPC. Both techniques can detect the amount of data on network traffic. Applications can keep signatures or patterns of narratives in packets that generate, allowing accurate detection of the use of the program in the network in real time. The deep packet inspection is often used in large business networks to detect worms, viruses and trojan horses that cannot be seen by other security software such as firewalls. DPI can also be used to reduce or prioritize certain types of network traffic, which is known as operations.
ISPS worldwide use DPI technology in different ways. Some use it to generate statistical information about operation that flows as their network, while others use network appliances-hand hardware, which sits on the network of Internet service providers-Pro comprehensive monitoring of users' operation. The most advanced of theseThe network devices have the ability to act on this data in real time. For example, some broadband providers use DPI to block or slow file sharing services. Network neutrality lawyers fear that this could lead to a multi -level Internet, a system in which programs and services that the customer can use online depends on how much the customer pays.
capture a large number of packets, internet services and governments can reconstruct e-mails, listen to VOIC Over Internet Protocol (VoIP), or even watch users on different websites to display targeted advertising. Several providers of Internet services in the US and U.K. It used this advanced version of the deep packet inspection to insert a targeted advertisement on the website that their customers visit. Sometimes, use DPI for supervision and censorship on the Internet. For example, the Chinese project Golden Shield, also known as “Great ChineseFirewall ', it is assumed to use DPI. The US National Security Agency has used commercial network appliances with a deep control of packets to track e-mail and VoIP.