Chapter 482 Network disconnection
After Lin Hong's carefully designed "Little Fatty" data package was sent out, in just a few minutes, the network centers of the military regions in northern China were directly messed up, because they suddenly found that the network was suddenly disconnected, and after restarting the router, this situation still occurred, and no original could be found. Because.
When they kept receiving inquiries from subordinate units and wanted to know what was going on with the network, they realized that this matter did not seem to be accidental.
The same phenomenon has also been staged in some parts of Telecom in northern China, and the major backbone network nodes of telecommunications companies have also happened. Many network administrators of nodes have called and asked the telecommunications department why the network suddenly could not be connected. Are they doing any equipment upgrade work?
The customer service staff of the telecommunications department were also confused. They quickly reported this situation to the technical service department of the telecommunications company, asking the technical engineers to find out where the problem was.
After more than ten minutes, this phenomenon quickly spread from cities in northern China to southern cities and even surrounding countries...
China's backbone network nodes are centered on North J, radiating to several other major cities, such as connecting Shen Y in the north, South J and Shanghai in the east, D and West A in the west, and Guang Z and Wu H in the south.
In addition, there are three main export routes, namely, the United Kingdom, the United States and Japan.
This phenomenon occurred after the disconnection of the network in China. It soon spread to these three countries, followed by different degrees of disconnection in the Philippines, India, South Korea, Finland, France... and other countries.
The transmission speed of data is exactly the same as that of electricity, which can reach the speed of light. If you want to spread all over the world, it is just an instantaneous thing, which is delayed. It's because of the major gateways.
A sudden global disconnection incident happened in a very short incident, and many people started at the beginning. They all thought it was just an accident, and more than 80% of them thought there was something wrong with the router. The router device was restarted directly.
The reason why the remaining people don't think so is that the machinery and equipment they are responsible for are extremely stable and do not allow this kind of network disconnection without warning at all.
When everyone realized that the network disconnection was unusual, they began to trace the main reason for this time...
......
The Red Army's information against the computer room.
"Strange, our network can't be connected." Someone soon found something abnormal.
"Yes, it's disconnected."
Someone guessed, "Have you been attacked by the other party?"
"It seems that it can't be wrong. Shit, I didn't expect them to have a hand!"
Everyone immediately talked about it.
Lin Hong was also slightly stunned when he saw this situation. Then a trace of surprise and a wry smile appeared on his face.
"Am I self-bound as a cocoon?"
Lin Hong said in a low voice to himself.
He already knows that the disconnection here is also caused by the data he sent to the outside world before.
His purpose was to attack the Blue Army network. As a result, he turned around and the data came back.
These data. Due to his careful design, when it first began to spread, it was spread separately in the form of fragments. Only after reaching the equipment will it be reassembled, but. Due to the characteristics of the border gateway protocol, it will disseminate a copy of these data in advance before these data are reassembled, and it is transmitted according to the IP in its routing table, which is somewhat similar to broadcasting, one-to-many transmission.
This directly leads to the direct diffusion of the number of these data in the network as a multiple of the exponential level, and it is still in the form of a backbone network. After a rebroadcast, if it is a Cisco machine, it will be directly caught, and the completion of the mission will fall into a suspended state.
Almost in a very short time, the Blue Army node fed back the data packet sent by Lin Hong. After all, the Blue Army network and the Red Army network belong to the same intranet. Both the physical distance and the node distance in the network are very close.
Captain Qian rushed out of his office again.
"What's going on?" He asked Lin Hong directly.
Lin Hong had no choice but to take a look at the Cisco router with the faulty light flashing on the equipment shelf, and then shrugged his shoulders and explained, "It's not because of the other party's attack, but that I accidentally injured our own router..."
After his explanation, Captain Qian opened his mouth and looked at him for a long time. Then he swallowed his saliva and asked, "When can this network be restored?"
"Now that the network is disconnected, I can't continue to send data to the outside world, and it should be restored soon. Just wait for the data packets spread on the Internet to disappear automatically. It's just..."
Speaking of this, Lin Hong paused for a moment with some hesitation.
"Just what?" Captain Qian asked curiously.
"It's just that I'm not sure how big the impact of this attack is. According to my judgment, this vulnerability seems to be more common in Cisco routers, that is to say..."
"That is to say, your attack is likely to cause a large-scale network paralysis, right?" Lao Wang was talking. He didn't know when he had come to the two of them.
Lin Hong nodded and acquiesced to Lao Wang's statement.
"It's a big deal, it's really a big deal!" Lao Wang's face showed admiration, "I didn't expect that you did such a beautiful thing again when I cracked the file."
Lao Wang has to admit that Lin Hong is better than him.
After listening to his words, Captain Qian remembered it. He quickly asked, "Lao Wang, has the file been cracked?"
Lao Wang nodded and said lightly, "It's done."
Originally, this was a very happy thing, but when he learned about Lin Hong's latest results, this feeling was greatly diluted.
He has just heard that someone has been constantly receiving calls from subordinate units, reporting that their network can no longer be connected, that is to say, the impact of Lin Hong's attack on the Blue Army is very great.
At this moment, Lao Wang is eager to know what he has done to the network before, which can cause such a large-scale network disconnection.
A new vulnerability?
What loophole can be so powerful?
Captain Qian had no feeling about it. When he heard Lao Wang's words, he was overjoyed and said, "Come on, send me a copy of the document, and I'll send it to the headquarters immediately!"
In his opinion, this matter is much more important than the attack made by Lin Hong.
After getting a copy of Lao Wang's file, he immediately used the bit messenger to transmit a copy to the headquarters.
The time of this network interruption lasted for about a quarter of an hour. In this quarter of an hour, the network disconnection incident has attracted great attention all over the world.
The RIPE Network Coordination Center in Amsterdam, the Netherlands, is only in the early morning, but all the technicians of the center are called by the head of the central department.
Monitoring data shows that within the past ten minutes, RIPE's data distribution system has sent countless malicious data to the outside world, which triggered a large-scale short-scale Internet disconnection.
RIPE Network Coordination Center is an independent, non-profit membership organization headquartered in Amsterdam, the Netherlands. It is mainly responsible for business in Europe, Central Asia and the Middle East, and also provides Internet resource allocation, registration services and coordination activities to support global Internet operations.
The current Internet divides the world into three regions, and each regional agency is responsible for the Internet operation management system such as IP address allocation in the region. One of the regional institutions is the RIPE Network Coordination Center.
The RIPE Network Coordination Center processes countless IP addresses from all over the world every day to assign their requests and is responsible for forwarding the data.
And early this morning, they received calls from all over the world protesting against their data center and distributing malicious data and code, which led to the network paralysis of many important network nodes.
To this end, the director of the center urgently summoned the technical engineers who were still sleeping and gave them an order immediately, asking them to thoroughly find out what was going on and whether their center had been attacked by hackers.
The survey results were quickly collected. Data and intelligence from all aspects showed that the amount of data forwarded this time was not large. Technical engineers soon found this type of abnormal packet. Inside the center, they conducted a closed test, and the results confirmed that this type of packet was used for Cisco routing. The device has an extremely powerful "destructive".
They further analyzed and found that this kind of data packet is a well-built deformed data packet, that is, the BGP data packet that has been damaged. They are larger than the traditional BGP routing information, so when the Cisco router is combined, there will be an abnormal situation, and then these have been damaged. The information was sent to other routers.
The main reason why the network disconnection situation is so serious is that these packets are completely legal at the beginning of transmission, but after achieving the goal, Cisco routers will fall into a state of denial of service.
Because the proportion of Cisco routers in the world is very large, and the product line that can be affected by this vulnerability is very wide, as long as one router refuses service, other routers that want to connect to this router will naturally be affected. As a result It can be imagined that it directly led to a short-term disconnection of the Internet.
The final survey results of safety engineers show that the original source of these abnormal data is the country in the East.
This has caused all kinds of speculations among many organizations and forces.
When did that country have such a strong computer technology?
Does this disconnection mean that they are secretly conducting some experiments and tests?