How to resolve domestic access generic top-level root header server exception

Domestic access common top-level root domain name server exception, some domestic users can not access the. com and other domain name Web sites.

After the January 21, 2014 failure, all the common top-level domain names were having a problem at home. Some users visit the site, will be jumped to 65.49.2.178 this IP address, resulting in the real site can not be successfully accessed. Query 65.49.2.178 information, found that the IP located in the United States, North Carolina, technology dynamic Internet Company, a large number of well-known IT companies in China Domain name is resolved to this address.

　To explain a few professional terms:

Generic top-level root domain: A top-level domain for use by specific organizations, for the first few English letters represented in the English name of the organization, the generic top-level domain includes a common domain name ending with. COM (business organization),. NET (an organization engaged in Internet services),. org (non-profit organization), and also includes a. Name ( New generic top-level root domain name for personal registration,. Aero (for air transport).

Root domain server: referred to as "root server", mainly used to manage the Internet's home directory, the world only 13 root servers, the name is "A" to "M", 1 primary root servers, placed in the United States. The remaining 12 are supplemented by root servers, of which 9 are set in the United States and three in the UK, Sweden and Japan. All root servers are managed by the United States Government-mandated Internet domain name and number distribution agency, ICANN, for global Internet domain name root servers, domain name systems, and IP addresses.

DNS:DNS, the acronym for Domain Name System, is a core service of the Internet, a distributed database that maps domain names to IP addresses, making it easier for people to access the Internet without remembering the number of IP strings that can be read directly by the machine. People are accustomed to memory domain name, but the machine only recognize each other IP address, domain name and IP address is one by one corresponding, the transformation between them is called Domain name resolution, domain name resolution needs to be specialized domain name resolution server to complete, the whole process is automatic. Input IP address is directly from the host to invoke content, the input domain name is through the domain name resolution server to the corresponding host IP address, and then call the content of the Web site from the host. If DNS fails, you will not be able to access the Internet immediately.

　　First of all, to restore the process of our visit to the Web site:

　　For example, a Web site that accesses xxx.com domain names takes three steps:

1, visit the xxx.com Domain name Web site request first point to the root server;

2, the root server will again point this request to the. COM server;

3. com server then point this request to xxx.com.

There have been two times in China root domain fault, one is July 06, 2013, Shanghai Unicom DNS equipment failure, resulting in 2G, 3G mobile phone users can not access the Internet. The other one is August 25, 2013. The CN root domain server is in full trouble. After a lapse of 5 months, the domestic again occurred DNS failure.

　As for the cause of this failure, the following several possibilities are presented:

1, if this problem only appears in China, it shows that the global root server has not been a problem, the problem may be in the domestic network service providers.

2, many Web sites are resolved to 65.49.2.178, because there is no root server, so it may be domestic and foreign server interface node failure. Expert analysis, the cause of the failure may be man-made hacker attacks.

　　How should this situation be solved?

From the level of ordinary users, users can also be modified by their own DNS server address for 114.114.114.114 or 8.8 8.8来 solution.

　　The specific steps are as follows:

1. View local connection properties;

2. Modify the TCP/IP V4 properties of the current network connection;

3. Modify the DNS server address to 114.114.114.114.