Reflection on the resolution of the company's LAN Domain Name

Recently it is reasonable to say that it will be relatively idle, but recently there has been an annoyance that has not been solved.

Because the company has built several test websites, it has also set up a DNS-domain integration (which comes with win2008r2 ), it is reasonable to say that apart from creating several test website addresses on that DNS server, others are default and there should be no other problems. In addition, according to other people's statements, DNS can also be prevented from being held by others, because the domain name is resolved based on the Root DNS, many problems are found in actual use.

1. Some websites on the Internet of the company cannot be resolved-the IP address corresponding to the domain name cannot be found at all, but some large websites such as --baidu.com QQ have no impact on opening them, it is estimated that the domain name DNS is in a foreign relationship (the company's headquarters is not in the Mainland), so the domain name DNS is also in a foreign domain name registrar. At that time, my solution wasForwarderIt points to the DNS of overseas companies and uses their DNS to resolve the issue.

However, recently, their DNS server seems to have encountered some problems. Now it does not support forwarding, or it seems that there are other faults. In the past, some of its main regions cannot be forwarded, the auxiliary area is also collapsed, leading to the failure of the company's business. Therefore, I can only set the main region on the company's internal DNS, and manually add the services used by the company's internal business. (If they change the IP address and do not notify me, they still cannot be used ).

; Connection timed out; no servers cocould be reached

2. Using the DNS test provided by win2003, the website cannot be found, and the unbound under Linux cannot find the website domain name.

It seems that there is no problem with the website you are using. You cannot find these domain names from the root server. However, it is normal to access these domain names on servers outside the company. It should be the problem with the win2008r2dns server, however, restarting DNS clearly indicates the cache, and updating data clearly indicates that outdated resources are useless. It has nothing to do with the forwarded DNS 114.114.114.114 8.8.8.8 223.5.5.5 and cannot be resolved. (the old data has been cleared before the test and the DNS server has been restarted)

The 50 m dialing optical fiber used by Shenzhen Telecom. DNS 202.96.134.20.202.96.128.166 is always faulty from time to time. (Is it really too many users, overwhelmed)

You have already contacted the Customer Service Manager of China Telecom to apply for a bandwidth of Mbps downstream and 4 Mbps upstream. Check the situation in a few days.

This article from the "lost lamb" blog, please be sure to keep this source http://2346860.blog.51cto.com/2336860/1568540

Reflection on the resolution of the company's LAN Domain Name