Internet Blackout Source ... Country DNS, became more durable

Recently, in the United States, the United States has a thought that online services were interrupted for more than an hour. In this accident, American Air Line, Fox News, Hsbc, and Coastco, the famous company service, are not a problem. The error occurred in the domain executive (DNS) of the front end. Even if the network infrastructure does not occur, it may cause significant damage to the DNS problem. This accident is expressed as 'Internet blackout'.

Lim Jun-hyung Korea Internet Promotion Agency (KISA) The Internet Address Technical Team Leader is directly linked to Internet services that the stability of DNS was directly linked to Internet services.

DNS is a system that converts the Internet address you want to connect to the IP address, and is the first gateway to the communication. In situations where DNS is managed by country and continent, KISA is conducting a management task for the 'KR' address of the national domain in Korea.

As the DNS state affects the quality of the domestic Internet service, the system is running more stability than anything else. KISA is operating DNS aiming at 99.9999% of service availability. This means that the annual service is less than 1 minute.

To achieve such a goal, the Internet Address Resource Center is mainly transferring and strengthening system stability. Duplexes all systems, including networks, and DNS distributed services (DDoS) attack defense capabilities were also increased by 3 times. The backup system has also changed to a 5-neutralized automatic system in the existing manual 3 neutralization system. We also established a complementary system to operate in the time of power failure and built an earthquake facility and waterproof ceiling for earthquake contrast.

Lim Jun Hyung KISA Team Leader said, Large cloud makers usually pursue 89.999% availability, and the national DNS has set a higher target, he has set a higher target, he said, he said. I did not take it, and I have duplicate a lot of part, so that the service is not stopped.

In addition to stability, processing speed is also important. As a result of the first gate of Internet services, it is because the processing speed of DNS is slow and it also affects the quality of the trial communication. An error on DNS is the same context that it is in large-scale internet disorders. The team leader is You have to go through the DNS, 5G, and 10th, you can use a highly used communication service-based content such as the Internet, and If you have a connection delay in DNS, if you have a delay in the DNS, you can not properly experience the communication quality. I explained.

There is a case of using this enormous influence of DNS to hack defense. DNS was utilized to stop 'Solawen' backdoor attacks that have been a wide range of victims of Ranska 'Wenner Cry', which was achieved in 2017, last year. Domains in charge of attacks were blocked by DNS, blocking additional damage.

According to KISA, as of August, the number of KR address registration is about 1.1 million, the number of IP address allocation is 100 million. DNS quantity per second is approximately 30,000. The quantity of quantity is expected to continue to increase in accordance with the increase in uninterruptible services due to the proliferation of corona 19, and the expansion of 5G use.

KISA is trying to stabilize DNS services through private cloud applications to enhance DDOS defense capabilities utilizing telecom infrastructure and improving large quantity processing capabilities. DNS Operations also checked on the operation of the operation to request improvement, and the error rate was lowered by 11% in 2014 to 6.2% last year.