Chapter 481 Network Atomic Bomb

Since its birth, computers have been serving human beings, providing people with all kinds of conveniences, helping and assisting people to complete their work, providing entertainment for everyone... and so on.

Therefore, various functions of a computer are called services, while powerful computers, which are used to provide various functions and services, are also called servers.

In the computer field, denial of service is not an active behavior, but a passive behavior, which means that others let the computer refuse service, not the computer's own initiative to refuse service.

Denial of service, as the name implies, is that hackers, including white hats or black hats, make the target refuse to provide services to others. There are many ways to achieve this purpose.

The most common is to use the data storm flood attack, that is, the vulnerability of three handshakes, to make the server's connection stack full. As a result, others are squeezed out and unable to establish a connection at all.

In addition, it can also directly make the server hang, freeze, or become extremely slow and unable to connect.

Of course, in addition to direct attacks on computers, other network devices can also achieve this purpose.

For example, the attack on the router that Lin Hong is going to do now can also make the server refuse service, and the most thorough way is to directly disconnect the other party's server from the network connection.

As before, Lin Hong began to build a special packet, but this packet is not an ordinary IP packet, but is specially used for the propagation of the border gateway protocol.

This kind of data packets belong to the data that directly exchanges route selection information between gateway hosts on the Internet. Usually, ordinary people have no access to such data packets at all, because these devices are directly used for communication between important institutions.

The data packet built by Lin Hong is larger than the ordinary BGP data packet, and the displacement between each data format is offset.

This is what Lin Hong deliberately did, this kind of deformed data packet. It will be spread in the form of fragments, and then recombined at the other end of the Cisco router, but because Lin Hong deliberately set the illegal offset. When combining, there will be problems, because Cisco routers do not have a corresponding mechanism when processing this kind of data.

Lin Hong has been tested before. When encountering this kind of data packet, Cisco routers will use a lot of resources to deal with this situation, thus entering a suspended state. Denial of service.

Because this has been studied for a long time before, the construction process of the packet is very smooth and fast. It only took Lin Hong less than five minutes to carefully build a bloated packet. Then, he copied the packet many times, and soon built a large number of such packets. Data packets.

Compared with other data packets. This kind of data packet is a small fat man, which is much larger than other data packets.

Lin Hong opened a small tool software and chose the other party's router IP. Then enter the command and start sending this data to the other party's router. Just as before, Tibetts, a U.S. Air Force pilot, pressed the "Little Fatty" atomic bomb launch button.

"Little Fatty" data packets were continuously sent out of Lin Hong's computer. More than ten seconds after the target, the Blue Army router, the Blue Army information against the brigade's computer room felt its power.

"Captain Zhao, our network is disconnected and no one can connect to the Internet." An information confrontation officer reported like Captain Zhao of the Blue Army's information confrontation brigade.

Captain Zhao has a better background than Captain Qian of the Red Army. He graduated from the National University of Defense Science and Technology with a master's degree in computer applications. This diploma is one of the best in the whole military region.

Hearing the report of his men, Captain Zhao immediately came to Li Yushan's side.

This information confrontation exercise is actually led by Li Yushan. After all, his level and qualifications are there, and even he, a graduate student of the University of National Defense Technology, can only stand aside.

Captain Zhao asked, "Mr. Li. What's the situation?"

Li Yushan has already discovered this problem and is studying it.

"At present, it seems that there is something wrong with the router. It may be due to the opponent's attack, which causes the network to be unstable, and the router also has something wrong. Xiaoding, go and restart the router.

Li Yushan doesn't realize at all that this is because the Red Army has specifically attacked the router, and his thinking is still a little inertia. In the face of this situation, he habitually believes that it may be an unstable failure of the router itself.

However, after Cainiao Xiaoding pressed the REBOOT button of the router and waited for about a minute, Li Yushan still found that it was completely PING the IP of different gateways, and he couldn't help frowning.

"Is the router broken?" Captain Zhao is also a knowledgeable person. Seeing this situation, he couldn't help but say his own judgment.

"It's possible." Li Yushan nodded uncertainly.

He ran to the router and checked the indicator light of the router. The fault light flashed above, indicating that the router is not working properly at present.

He restarted again, and the faulty light showed normal for a while, and then began to change color again.

When Li Yushan was about to confirm Captain Zhao's judgment, his student Ding Huahui came over at this time and reported, "Mr. Li, the following subordinate units also reported that their network has been disconnected."

"Oh?" Li Yushan couldn't help looking at Ding Huahui in surprise when he heard the words, and the expression on his face was stunned, "Are you disconnected from the Internet?"

Ding Huahui nodded: "Yes, there have been two places to call."

As soon as his voice fell, the phone over there rang again.

This time, it was called by the Blue Army Command. According to the feedback, their network is no longer connected.

"This..." Li Yushan couldn't help but be completely stunned. "Is this the other party's attack?"

Ding Huahui was surprised and said, "Isn't that possible? How can so many backbone networks be paralyzed in an instant?

In fact, Ding Huahui did not know that when he said this, the network of the whole military region was completely paralyzed at this moment, including Lin Hong's own network nodes, which suddenly responded.

Moreover, if each router is regarded as a lamp in the network node, at this moment, the network lights of the entire North J Military Region are going out at a very fast speed. The "little fat man" data packets sent by Lin Hong before are really like network atomic bombs, fighting against the Blue Army information. Centered on the brigade, it detonated directly, instantly radiated to other surrounding networks, and spread at the speed of several plots of land... (to be continued. If you like this work, you are welcome to come to Qidian to vote for recommendation and monthly tickets. Your support is my greatest motivation.)