In our previous article, We saw how to install PowerDNS on Ubuntu 14.04. In this tutorial, let us see how to install PowerDNS on CentOS 6.5.
Install PowerDNS On CentOS
Operating system: CentOS 6.5 minimal server IP Address: 192.168.1.150/24 Hostname: server.unixmen.local
Update your system:
First of all, update your system:
Note: The commands in this article is being performed by Root user.
Install MySQL using command:
yum install mysql-server mysql -y
Start MySQL service and let it to start automatically on every reboot:
service mysqld start chkconfig mysqld on
Check if MySQL is listening:
netstat -tap | grep mysql
tcp 0 0 *:mysql *:* LISTEN 1425/mysqld
Set Database Root user password:
By default, Database root password is empty. So, to prevent unauthorized access to your database server, let us set root user password. Enter the following command to setup mysql root user password:
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY! In order to log into MySQL to secure it, we'll need the current password for the root user. If you've just installed MySQL, and you haven't set the root password yet, the password will be blank, so you should just press enter here. Enter current password for root (enter for none): ## Press Enter ## OK, successfully used password, moving on... Setting the root password ensures that nobody can log into the MySQL root user without the proper authorisation. Set root password? [Y/n] ## Press Enter ## New password: ## Enter new password ## Re-enter new password: ## Re-enter new password ## Password updated successfully! Reloading privilege tables.. ... Success! By default, a MySQL installation has an anonymous user, allowing anyone to log into MySQL without having to have a user account created for them. This is intended only for testing, and to make the installation go a bit smoother. You should remove them before moving into a production environment. Remove anonymous users? [Y/n] ## Press Enter ## ... Success! Normally, root should only be allowed to connect from 'localhost'. This ensures that someone cannot guess at the root password from the network. Disallow root login remotely? [Y/n] ## Press Enter ## ... Success! By default, MySQL comes with a database named 'test' that anyone can access. This is also intended only for testing, and should be removed before moving into a production environment. Remove test database and access to it? [Y/n] ## Press Enter ## - Dropping test database... ... Success! - Removing privileges on test database... ... Success! Reloading the privilege tables will ensure that all changes made so far will take effect immediately. Reload privilege tables now? [Y/n] ## Press Enter ## ... Success! Cleaning up... All done! If you've completed all of the above steps, your MySQL installation should now be secure. Thanks for using MySQL!
We completed the installation now. Next, we will Install PowerDNS.
First, install and enable EPEL repository.
rpm -Uvh http://epel.mirror.net.in/epel/6/i386/epel-release-6-8.noarch.rpm
After installing EPEL repository, run the following command to install PowerDNS.
yum install pdns pdns-backend-mysql bind-utils
After installing PowerDNS, run the following commands to start and enable PowerDNS service to start automatically on every reboot.
service pdns start chkconfig pdns on
PowerDNS has been installed now.
Create PowerDNS Database and User in MySQL
The next step is we should now create the necessary database, user account, tables, and records etc., for the PowerDNS.
Enter to MySQL prompt using command:
mysql -u root -p
Create database, namely ‘powerdns’. You can define your own.
CREATE DATABASE powerdns;
Create database user, namely ‘poweruser’.
GRANT ALL ON powerdns.* TO 'poweruser '@'localhost' IDENTIFIED BY 'centos';
powerdns – is the database;
poweruser – is the database user,
centos – is the password for the ‘poweruser’ user.
I recommend you to use any strong password to tighten the security.
Enter the following command to update the user settings.
Now, use the powerdns database with command:
Create the necessary tables and records.
First, let us create domains table:
CREATE TABLE domains ( id INT auto_increment, name VARCHAR(255) NOT NULL, master VARCHAR(128) DEFAULT NULL, last_check INT DEFAULT NULL, type VARCHAR(6) NOT NULL, notified_serial INT DEFAULT NULL, account VARCHAR(40) DEFAULT NULL, primary key (id) );
Create Unique Index for domains table:
CREATE UNIQUE INDEX name_index ON domains(name);
Create records table:
CREATE TABLE records ( id INT auto_increment, domain_id INT DEFAULT NULL, name VARCHAR(255) DEFAULT NULL, type VARCHAR(6) DEFAULT NULL, content VARCHAR(255) DEFAULT NULL, ttl INT DEFAULT NULL, prio INT DEFAULT NULL, change_date INT DEFAULT NULL, primary key(id) );
Create the following indexes for records table:
CREATE INDEX rec_name_index ON records(name);
CREATE INDEX nametype_index ON records(name,type);
CREATE INDEX domain_id ON records(domain_id);
Create the supermasters table:
CREATE TABLE supermasters ( ip VARCHAR(25) NOT NULL, nameserver VARCHAR(255) NOT NULL, account VARCHAR(40) DEFAULT NULL );
Finally, exit from MySQL prompt using command:
Now, we should configure PowerDNS to use MySQL as backend to store Zone files and records.
Backup the old configuration file.
mv /etc/pdns/pdns.conf /etc/pdns/pdns.conf.bak
Then, create /etc/pdns/pdns.conf file;
Add the following lines at the end. Set the correct database name and database user which we created earlier.
# MySQL Configuration # # Launch gmysql backend launch=gmysql # gmysql parameters gmysql-host=localhost gmysql-dbname=powerdns gmysql-user=poweruser gmysql-password=centos
Finally, restart powerdns service.
service pdns restart
First, edit your network interface configuration file /etc/sysconfig/network-scripts/ifcfg-eth0,
Set the name server IP address:
DEVICE=eth0 TYPE=Ethernet UUID=add4274e-d5be-4834-9142-8a85f4444b00 ONBOOT=yes NM_CONTROLLED=yes BOOTPROTO=none DEFROUTE=yes IPV4_FAILURE_FATAL=yes IPV6INIT=no NAME="System eth0" HWADDR=08:00:27:DC:33:3F IPADDR=192.168.1.150 PREFIX=24 GATEWAY=192.168.1.1 DNS1=192.168.1.150
Restart the network service to save the changes.
service network restart
We completed all installation and configuration parts. Now, we will check whether PowerDNS is really working or not.
We must allow the DNS service default port 53 through firewall.
Edit file /etc/sysconfig/iptables,
Add the following line:
-A INPUT -p tcp -m state --state NEW --dport 53 -j ACCEPT
Save and close the file. Then, restart iptables service.
service iptables restart
Now, enter the following command to check PowerDNS is working:
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.30.rc1.el6_6.2 <<>> @localhost ; (2 servers found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47553 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; WARNING: recursion requested but not available ;; QUESTION SECTION: ;. IN NS ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue Mar 31 16:08:40 2015 ;; MSG SIZE rcvd: 17
Here 192.168.1.150 is my PowerDNS server’s IP address.
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.30.rc1.el6_6.2 <<>> @192.168.1.150 ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58268 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; WARNING: recursion requested but not available ;; QUESTION SECTION: ;. IN NS ;; Query time: 0 msec ;; SERVER: 192.168.1.150#53(192.168.1.150) ;; WHEN: Tue Mar 31 16:09:09 2015 ;; MSG SIZE rcvd: 17
That’s it. PowerDNS is ready to use.
I have successfully installed and configured PowerDNS, now what? It is time to manage PowerDNS using Poweradmin administration tool.