Shulou(Shulou.com)06/02 Report--

Experimental structure: DNS forward parsing DNS reverse parsing DNS master-slave synchronization 1, DNS forward parsing 1, installing bind toolkit

Enter: yum install bind-y

Through the online yum library installation, only when the bind package is installed can you have the foundation for building DNS services.

2. Modify the global configuration file

Input: vim / etc/named.conf

Modify the global configuration file.

Where, usually only two options need to be modified:

(1) modify the IP address behind the listen-on to listen for port 53 of the native IP--. No matter who resolves the domain name through the native DNS service, it can be heard.

(2) change the allow-query to any--, which allows anyone to use the native DNS service.

3. Modify the zone configuration file

Input: vim / etc/named.rfc1912.zones

Modify the zone profile

Here is the file that adds the domain name and zone data file name

Add the domain name after zone

Add the region data file name after file

4. Modify the zone data configuration file

Specific steps:

(1) enter the directory where the DNS parsing record file is stored

Input: cd / var/named/

(2) copy and rename the template file to "named.yunjisuan" without changing its original attributes.

Enter: cp-p / var/named/named.localhost / var/named/named.yunjisuan

(3) use the VIM editor to enter the configuration file

Input: vim / var/named/named.yunjisuan

Operation example:

(4) start to modify the data file

The result is as follows:

5. Modify your own DNS configuration file

(1) enter the domain name resolution configuration file

Input: vim / etc/resolv.conf

(2) add your own IP address to the VIM editor for later verification of whether the service is valid.

Example:

6. Start the service and verify it

The steps to activate the service are as follows:

Enter:

Systemctl stop firewalld.service--, turn off the firewall

Setenforce 0Mel-turn off enhanced security features

Systemctl start named-- enables DNS service

Systemctl status named-- to view the running status of DNS service

Example:

Perform forward parsing verification

Enter in turn:

Host www.yunjisuan.com

Host ftp.yunjisuan.com

Host http.yunjisuan.com

Host aaa.yunjisuan.com

Corresponding to the IP address resolved by the host name "www", "ftp", "http alias www" and the wrong host name, respectively.

Operation example:

2. Reverse parsing 1. Modify the configuration file of the inverse parsing area

Input: vim / etc/named.rfc1912.zones

Make changes to the following figure

2. Modify the zone data configuration file-reverse parsing

Copy and rename the template file to "niyunjisuan" without changing its original properties

Enter: cp-p / var/named/yunjisuan / var/named/niyunjisuan

3. Modify the corresponding reverse parsing area data configuration file

(1) use the VIM editor to enter the reverse parsing data configuration file

Input: vim / var/named/niyunjisuan

(3) delete the data of the original forward resolution profile, and add the reverse resolution network number and domain name.

Enter: 10 IN PTR www.yunjisuan.com

Operation example:

4. Restart the service and verify reverse resolution

Enter:

Systemctl restart named-- restarts the DNS service

Host 192.168.10.10-reverse resolution to resolve IP addresses to domain names

Operation example:

Third, DNS master-slave synchronization

Open a virtual server as a slave server, and also use the online yum library to install the bind tool.

The white background of all the pictures below is the slave server and the black background is the master server!

1. Modify the global configuration file of the slave server

Input: vim / etc/named.conf

Follow the figure below to make changes:

2. Modify the slave server zone configuration file

Input: vim / etc/named.rfc1912.zones

Modify according to the following figure:

3. Return to the master server and modify the corresponding zone data configuration file

Input: vim / etc/named.rfc1912.zones

Modify according to the following figure:

4. Restart the master server service and start the DNS service from the server.

Enter: systemctl restart named in the primary server

Enter: systemctl start named from the server

Operation example:

5. Verify that the slave server

Input: ls / var/named/slaves

The corresponding zone data configuration file has been backed up.

Operation example:

These are all the contents of the experiment. You are welcome to leave a message for common progress in the comment area below. Any inadequacies in this experiment can also be raised in the comment area.

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