Smart DNS from the root domain to the client

DNS Experimental Network Topology Diagram

Note: 1. First set all ip to static IP. two。 Clear firewall rule 3. When performing a dig + trace trace on a passing DNS server, it can only be performed above CentOS 7 on the customer server. 4. After each subdomain file is established, modify the file permission to 640, the owner is root, and the group is named. Set the following line in the root domain modification / etc/named.conf file first.

Create the root.zone file in the / var/named/ directory

Second, top-level domain COM modify / etc/named.rfc1912.zone file; add a domain file

Create the com.zone file in the / var/named/ directory

Third, second-level domain COM

Create the qq.com.zone file in the / var/named/ directory

IV. Intelligent DNS

Create the domain file of the intelligent DNS in the / var/named/ directory, shanghai.zone,beijing.zone

Test the Beijing domain analysis results on the customer service side.

Analytical results of Shanghai area