In this tutorial I will describe how to install and configure MyDNS and MyDNSConfig. MyDNS is a DNS server that uses a MySQL database as backend instead of configuration files like, for example, Bind or djbdns. The advantage is that MyDNS simply reads the records from the database, and it does not have to be restarted/reloaded when DNS records change or zones are created/edited/deleted. A secondary nameserver can be easily set up by installing a second instance of MyDNS that accesses the same database or, to be more redundant, uses the MySQL master / slave replication features to replicate the data to the secondary nameserver.
MyDNSConfig is an easy to use web-based interface to MyDNS. MyDNSConfig can create all types of DNS records that are available in MyDNS and adds features like user management and access privileges.
This setup uses Ubuntu 6.10, but it should work with Debain Etch, too.
Installing The Prerequisites
MyDNSConfig is a web-based interface to MyDNS written in PHP. This requires a webserver with PHP enabled and the MySQL database server. If you have already Apache, PHP and MySQL installed, you may skip this step.
Installing MySQL and Apache webserver:
apt-get install libdbd-mysql-perl libdbi-perl libmysqlclient15off libnet-daemon-perl libplrpc-perl mysql-client mysql-client-5.0 mysql-server mysql-common apache2 phpmyadmin libapache2-mod-php5
Set the MySQL root password:
mysqladmin -u root password yourrootsqlpassword
Replace yourrootsqlpassword with a password of your choice.
I will use the MyDNS package from the Ubuntu universe repository. Befor you go to the next steps, please make sure that the universe repository is enabled in /etc/apt/sources.list.
Log in to MySQL and create the database:
mysql -u root -p
CREATE DATABASE mydns;
GRANT SELECT, INSERT, UPDATE, DELETE ON mydns.* TO ‘mydns’@’localhost’ IDENTIFIED BY ‘mydnspassword’;
GRANT SELECT, INSERT, UPDATE, DELETE ON mydns.* TO ‘mydns’@’localhost.localdomain’ IDENTIFIED BY ‘mydnspassword’;
Replace the word mydnspassword in the above commands with a password of your choice.
tar xvfz MyDNSConfig-1.1.0.tar.gz
cp -rf interface/* /usr/share/mydnsconfig/
ln -s /usr/share/mydnsconfig/web/ /var/www/mydnsconfig
Install the MyDNSConfig SQL Database:
mysql -u root -p mydns < install/mydnsconfig.sql
The command above asks for a password, please enter the password of the MySQL root user.
Edit the MyDNSConfig configuration:
The file should look like this:
<?php /* Copyright (c) 2005, Till Brehm, Falko Timme, projektfarm Gmbh All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of ISPConfig nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ ini_set('register_globals',0); $conf["app_title"] = "MyDNSConfig"; $conf["app_version"] = "1.1.0"; $conf["rootpath"] = "/usr/share/mydnsconfig"; $conf["fs_div"] = "/"; // File system divider, \\ on windows and / on linux and unix $conf["classpath"] = $conf["rootpath"].$conf["fs_div"]."lib".$conf["fs_div"]."classes"; $conf["temppath"] = $conf["rootpath"].$conf["fs_div"]."temp"; /* Database Settings */ $conf["db_type"] = 'mysql'; $conf["db_host"] = 'localhost'; $conf["db_database"] = 'mydns'; $conf["db_user"] = 'mydns'; $conf["db_password"] = 'mydnspassword'; /* External programs */ $conf["programs"]["wput"] = $conf["rootpath"]."/tools/wput/wput"; /* Themes */ $conf["theme"] = 'grey'; $conf["html_content_encoding"] = 'text/html; charset=iso-8859-1'; $conf["logo"] = 'themes/default/images/mydnsconfig_logo.gif'; /* Default Language */ $conf["language"] = 'en'; /* Auto Load Modules */ $conf["start_db"] = true; $conf["start_session"] = true; /* DNS Settings */ $conf["auto_create_ptr"] = 1; // Automatically create PTR records? $conf["default_ns"] = 'ns1.example.com.'; // must be set if $conf['auto_create_ptr'] is 1. Don't forget the trailing dot! $conf["default_mbox"] = 'admin.example.com.'; // Admin email address. Must be set if $conf['auto_create_ptr'] is 1. Replace "@" with ".". Don't forget the trailing dot! $conf["default_ttl"] = 86400; $conf["default_refresh"] = 28800; $conf["default_retry"] = 7200; $conf["default_expire"] = 604800; $conf["default_minimum_ttl"] = 86400; ?>
Afterwards, remove the MyDNSConfig installer from the /tmp directoy:
rm -rf MyDNSConfig-1.1.0/
rm -f MyDNSConfig-1.1.0.tar.gz
Now install the MyDNS package from Ubuntu. As we created a database named mydns already which contains all the tables needed for MyDNS, we can choose to not create the database in the following setup.
apt-get install mydns-mysql
Modify the MyDNS configuration file so that MyDNS will listen also on TCP and allow zone transfers:
allow-tcp = yes allow-axfr = yes
The basic installation of MyDNS and MyDNSConfig is now finished. To log in to the MyDNSConfig interface, open a web browser and enter enter the following URL:
Replace <your_ip_address> with the IP address of your server.
The default username and password of MyDNSConfig is:
Don’t forget to change the password after login under System > Users.
MyDNS does not contain a DNS resolver that is able to resolve DNS records that MyDNS is not athoritive for. In the next step I will install and configure the DNS resolver and cache DNSMasq to act as a local DNS resolver and configure MyDNS to use DNSMasq to resolve external domains. If you don’t want your server to resolve external domains, you can skip this part.
Create a DNS Resolver on IP 127.0.0.1:
apt-get install dnsmasq
This installs the dnsmasq Ubuntu package. Now we will have to edit the DNSMasq and MyDNS configuration files to ensure that both pacakges won’t listen on the same port on all IP addresses.
listen-address=127.0.0.1 no-dhcp-interface= bind-interfaces
Now edit the mydns.conf file to configure MyDNS to not listen on 127.0.0.1:
no-listen = 127.0.0.1 recursive = 127.0.0.1
Then edit /etc/resolv.conf:
and add the following line as first line so that the DNSMasq DNS-Cache is used for all local DNS queries, too:
- MyDNSConfig 1.0 Tutorial By Falko Timme
- MyDNS Homepage
- MyDNSConfig Homepage
- DNSMasq Homepage