Часть 1. Установка и настройка авторитетного DNS сервера на основе решения PowerDNS // Базовая установка

Добрый день!

В этой статье я опишу настройку авторитетного DNS сервера, на основе решения PowerDNS. PowerDNS — высокопроизводительный, бесплатный DNS сервер с открытым исходным кодом.

PowerDNS — представляет собой высокопроизводительный DNS-сервер, написанный на C++ и лицензируемый под лицензией GPL. Разработка ведётся в рамках поддержки Unix-систем; Windows-системы более не поддерживаются.
Сервер разработан в голландской компании PowerDNS.com Бертом Хубертом и поддерживается сообществом свободного программного обеспечения.
PowerDNS использует гибкую архитектуру хранения/доступа к данным, которая может получать DNS информацию с любого источника данных. Это включает в себя файлы, файлы зон (англ.) BIND, реляционные базы данных или директории LDAP.
PowerDNS по умолчанию настроен на обслуживание запросов из БД.
После выхода версии 2.9.20 программное обеспечение распространяется в виде двух компонентов — (Authoritative) Server (авторитетный DNS) и Recursor (рекурсивный DNS). Официальный сайт: www.powerdns.com


Итак, начнем все с чистой операционной системы CentOS, скачанной с официального сайта www.centos.org.
Конфигурация моего оборудования:
HDD: 15Gb
RAM: 16Gb
CPU: 8*2,4GHz
OS: CentOS 7 (x64)
Дистрибутив: CentOS-7-x86_64-Minimal-1503-01.iso

Моя версия ПО:
PowerDNS authoritative v3.4.8
PowerDNS recursor v3.7.3
Poweradmin v2.1.7



1) Обновляем систему и подключаем репозитории:

yum update -y
yum clean all
rpm -Uvh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm
rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm

Проверяем:

yum repolist

2) Устанавливаем различные полезные утилиты

yum install net-tools wget bind-utils tcpdump unzip telnet traceroute -y

3) Отключение firewalld и устанавливаем iptables

systemctl stop firewalld
systemctl disable firewalld
yum -y install iptables-services
systemctl enable iptables.service
systemctl start iptables.service
iptables -L -v -n

Создаем правила для файервола

vi /etc/sysconfig/iptables

Правила файервола

# sample configuration for iptables service
# you can edit this manually or use system-config-firewall
# please do not ask us to add additional ports/services to this default configuration
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -i ens160  -j ACCEPT
-A INPUT -i ens192 -p tcp  -m state --state NEW  --dport 53 -j ACCEPT
-A INPUT -i ens192 -p udp -m state --state NEW  --dport 53 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
-P INPUT DROP
COMMIT

И перезагружаем iptables

service iptables restart

4) Создаем папку со скриптами для управления

mkdir /script

vi /script/reload.sh
<code>
service pdns restart
service httpd restart
</code>
chmod +x /script/*.sh

5) Устанавливаем базу данных. Для Centos 7 лучше подходит MariaDB.
Тут есть несколько вариантов:
— Локальная база без репликации
— SQL кластер.

Установка локальной базы без репликации
Добавляем репозиторий.

sudo vi /etc/yum.repos.d/MariaDB.repo

Вставляем в файл следующие строки:

[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.0/centos7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1

Устанавливаем

yum install MariaDB-client MariaDB-common MariaDB-compat MariaDB-devel MariaDB-server MariaDB-shared -y

Стартуем mysql

sudo /etc/init.d/mysql start

Затем выполните следующую команду, чтобы защитить сервер базы данных.

sudo mysql_secure_installation

Затем выберите «Y» (Да) для остальных подсказок, пока вы не закончите.

Enter current password for root (enter for none): press Enter
Set root password? Y
New password: Type new root password
Re-enter new password: Confirm the password
Remove anonymous users? Y
Disallow root login remotely? Y
Remove test database and access to it? Y
Reload privilege tables now? Y

Последнее, необходимо заменить cnf.ini файл по умолчанию в /etc/ для MariaDB. Но для начала нужно перейти в:

cd /usr/share/mysql

И использовать один из предопределенных cnf.ini конфигураций которые доступны (Huge, Medium и Small) в данной папке.
Сделаем резервное копирование cnf.ini файла:

sudo mv /etc/cnf.ini /etc/cnf.ini.bak

Затем скопируйте один из предварительных конфигураций в MariaDB:

sudo cp /usr/share/mysql/my-huge.cnf /etc/cnf.ini

Перезапускаем MariaDB и добавляем в автозапуск

sudo /etc/init.d/mysql restart
systemctl status mysql
systemctl enable mysql
ss -tnlp | grep 3306
netstat -tap | grep mysql

Мне нужно создать пользователя и чтобы он мог подключатся с любого компьютера, для этого:

mysql -u root -p
GRANT ALL PRIVILEGES ON *.* TO 'imperituroard'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;
exit

Можно попробовать подключиться к базе данных, например с помощью программы Navicat Premium.

Также в качестве базы данных для PowerDNS, можно использовать SQL кластер.
Настройка SQL кластера
Ноды кластера устанавливаются на тех же серверах, что и сам PowerDNS. При изменении зоны на одном сервере, происходит репликация базы, следовательно зона изменяется на другом сервере.
Я устанавливал кластер так:
Добавляем репозиторий MariaDB как в первой части статьи и устанавливаем необходимые пакеты.

sudo setenforce 0
sudo yum -y install socat
sudo yum -y install MariaDB-Galera-server MariaDB-client rsync galera
sudo service mysql start
sudo /usr/bin/mysql_secure_installation

Создаем пользователей

mysql -u root -p
<source lang="sql">
DELETE FROM mysql.user WHERE user='';
GRANT ALL ON *.* TO 'root'@'%' IDENTIFIED BY 'dbpassDw1yx78whxwF5sX';
GRANT USAGE ON *.* to sst_user@'%' IDENTIFIED BY 'dbpassDw1yx78whxwF5sX';
GRANT ALL PRIVILEGES on *.* to sst_user@'%';
FLUSH PRIVILEGES;
quit

Конфигурирование нод

Первая нода:

sudo service mysql stop
sudo cat >> /etc/my.cnf.d/server.cnf << EOF
binlog_format=ROW
default-storage-engine=innodb
innodb_autoinc_lock_mode=2
innodb_locks_unsafe_for_binlog=1
query_cache_size=0
query_cache_type=0
bind-address=0.0.0.0
datadir=/var/lib/mysql
innodb_log_file_size=100M
innodb_file_per_table
innodb_flush_log_at_trx_commit=2
wsrep_provider=/usr/lib64/galera/libgalera_smm.so
wsrep_cluster_address="gcomm://172.24.184.177,172.24.184.178"
wsrep_cluster_name='ard_cluster'
wsrep_node_address='172.24.184.177'
wsrep_node_name='db1'
wsrep_sst_method=rsync
wsrep_sst_auth=sst_user:dbpassDw1yx78whxwF5sX
EOF

Вторая нода:

sudo service mysql stop
sudo cat >> /etc/my.cnf.d/server.cnf << EOF
binlog_format=ROW
default-storage-engine=innodb
innodb_autoinc_lock_mode=2
innodb_locks_unsafe_for_binlog=1
query_cache_size=0
query_cache_type=0
bind-address=0.0.0.0
datadir=/var/lib/mysql
innodb_log_file_size=100M
innodb_file_per_table
innodb_flush_log_at_trx_commit=2
wsrep_provider=/usr/lib64/galera/libgalera_smm.so
wsrep_cluster_address="gcomm://172.24.184.177,172.24.184.178"
wsrep_cluster_name='ard_cluster'
wsrep_node_address='172.24.184.178'
wsrep_node_name='db2'
wsrep_sst_method=rsync
wsrep_sst_auth=sst_user:dbpassDw1yx78whxwF5sX
EOF

Запуск на первичной ноде (primary)

sudo /etc/init.d/mysql start --wsrep-new-cluster

Запуск на остальных нодах (secondary)

sudo /etc/init.d/mysql start

Проверяем репликацию
На каждой ноде смотрим статус кластера:

mysql -u root -p -e "show status like 'wsrep%'"

Создаем тестовую базу данных на первой ноде

mysql -u root -p -e 'CREATE DATABASE clustertest;'
mysql -u root -p -e 'CREATE TABLE clustertest.mycluster ( id INT NOT NULL AUTO_INCREMENT, name VARCHAR(50), ipaddress VARCHAR(20), PRIMARY KEY(id));'
mysql -u root -p -e 'INSERT INTO clustertest.mycluster (name, ipaddress) VALUES ("db1", "172.24.184.177");'

Проверяем наличие этой базы на каждой ноде

mysql -u root -p -e 'SELECT * FROM clustertest.mycluster;'

На всех нодах, должно быть правильно установленно время, это обязательно. Иначе вы столкнётесь с тем что, при SST ноды с донора, синхронизируемая нода будет просто чего-то ждать, без каких бы то ни было признаком активности.
Устанавливаем ntp:

yum install ntp -y
systemctl enable ntpd.service
service ntpd start

Также можно указать свой ntp сервер в файле /etc/ntp.conf

6) Создание и настройка базы данных для PowerDNS
Описано на официальном сайте doc.powerdns.com
Создаем файл pdns.sql в /root и выполняем команду:

mysql -u root -p < /root/pdns.sql

Содержимое файла pdns.sql

CREATE DATABASE powerdns character set utf8;
GRANT ALL ON powerdns.* TO 'imperituroard'@'localhost' IDENTIFIED BY 'password';
FLUSH PRIVILEGES;
USE powerdns;
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)
) Engine=InnoDB;
CREATE UNIQUE INDEX name_index ON domains(name);
CREATE TABLE records (
  id                    INT AUTO_INCREMENT,
  domain_id             INT DEFAULT NULL,
  name                  VARCHAR(255) DEFAULT NULL,
  type                  VARCHAR(10) DEFAULT NULL,
  content               VARCHAR(64000) DEFAULT NULL,
  ttl                   INT DEFAULT NULL,
  prio                  INT DEFAULT NULL,
  change_date           INT DEFAULT NULL,
  disabled              TINYINT(1) DEFAULT 0,
  ordername             VARCHAR(255) BINARY DEFAULT NULL,
  auth                  TINYINT(1) DEFAULT 1,
  PRIMARY KEY (id)
) Engine=InnoDB;
CREATE INDEX nametype_index ON records(name,type);
CREATE INDEX domain_id ON records(domain_id);
CREATE INDEX recordorder ON records (domain_id, ordername);
CREATE TABLE supermasters (
  ip                    VARCHAR(64) NOT NULL,
  nameserver            VARCHAR(255) NOT NULL,
  account               VARCHAR(40) NOT NULL,
  PRIMARY KEY (ip, nameserver)
) Engine=InnoDB;
CREATE TABLE comments (
  id                    INT AUTO_INCREMENT,
  domain_id             INT NOT NULL,
  name                  VARCHAR(255) NOT NULL,
  type                  VARCHAR(10) NOT NULL,
  modified_at           INT NOT NULL,
  account               VARCHAR(40) NOT NULL,
  comment               VARCHAR(64000) NOT NULL,
  PRIMARY KEY (id)
) Engine=InnoDB;
CREATE INDEX comments_domain_id_idx ON comments (domain_id);
CREATE INDEX comments_name_type_idx ON comments (name, type);
CREATE INDEX comments_order_idx ON comments (domain_id, modified_at);
CREATE TABLE domainmetadata (
  id                    INT AUTO_INCREMENT,
  domain_id             INT NOT NULL,
  kind                  VARCHAR(32),
  content               TEXT,
  PRIMARY KEY (id)
) Engine=InnoDB;
CREATE INDEX domainmetadata_idx ON domainmetadata (domain_id, kind);
CREATE TABLE cryptokeys (
  id                    INT AUTO_INCREMENT,
  domain_id             INT NOT NULL,
  flags                 INT NOT NULL,
  active                BOOL,
  content               TEXT,
  PRIMARY KEY(id)
) Engine=InnoDB;
CREATE INDEX domainidindex ON cryptokeys(domain_id);
CREATE TABLE tsigkeys (
  id                    INT AUTO_INCREMENT,
  name                  VARCHAR(255),
  algorithm             VARCHAR(50),
  secret                VARCHAR(255),
  PRIMARY KEY (id)
) Engine=InnoDB;
CREATE UNIQUE INDEX namealgoindex ON tsigkeys(name, algorithm);

7) Устанавливаем PowerDNS autoritative.
Через репозиторий epel

yum install pdns pdns-backend-mysql pdns-tools pdns-backend-postgresql -y
systemctl enable pdns.service
systemctl start pdns.service
netstat -tap | grep pdns

Через репозиторий powerdns
Для версии 4.0.0:

yum -y install epel-release yum-plugin-priorities
curl -o /etc/yum.repos.d/powerdns-auth-40.repo https://repo.powerdns.com/repo-files/centos-auth-40.repo
yum install pdns

Либо из исходников
Исходники PowerDNS можно найти на github.
Устанавливаем необходимые программы для сборки из исходников и выполняем предварительное конфигурирование.

yum install autoconf automake bison flex g++ git libboost-all-dev libtool make pkg-config ragel libmysqlclient-dev unzip
yum groupinstall "Development Tools"
cd /etc/yum.repos.d/
wget http://download.opensuse.org/repositories/home:waziers/CentOS_CentOS-6/home:waziers.repo
wget http://springdale.math.ias.edu/data/puias/unsupported/6/x86_64/ragel-6.6-2.puias6.x86_64.rpm
rpm -i ragel-6.6-2.puias6.x86_64.rpm
yum install -y LuaJIT LuaJIT-devel openssl-devel boost-devel sqlite-devel mysql mysql-devel
wget https://github.com/PowerDNS/pdns/archive/master.zip
unzip master.zip
cd pdns-master
./bootstrap

Далее собираем и устанавливаем PowerDNS. Также можно посмотреть доступные опции.

cd /root/pdns-master
./configure --help
./configure --with-luajit --with-lua --with-gnu-ld --with-sqlite3 --with-mysql-lib--with-mysql
make
make install

8) Настраиваем конфигурацию авторитетного сервера

cp /etc/pdns/pdns.conf /etc/pdns/pdns.conf.bak
vi /etc/pdns/pdns.conf

Файл конфигурации авторитетного сервера PowerDNS

setuid=pdns
setgid=pdns
launch=gmysql
gmysql-host=127.0.0.1
gmysql-user=imperituroard
gmysql-password=password
gmysql-dbname=powerdns
gmysql-dnssec=yes
# Autogenerated configuration file template
#################################
# allow-axfr-ips        Allow zonetransfers only to these subnets
#
 allow-axfr-ips=0.0.0.0/0

#################################
# allow-dnsupdate-from  A global setting to allow DNS updates from these IP ranges.
#
# allow-dnsupdate-from=127.0.0.0/8,::1

#################################
# allow-notify-from     Allow AXFR NOTIFY from these IP ranges. If empty, drop all incoming notifies.
#
# allow-notify-from=0.0.0.0/0,::/0

#################################
# allow-recursion       List of subnets that are allowed to recurse
#
allow-recursion=0.0.0.0/0
#lazy-recursion=yes

#recursor=127.0.0.1:5354
recursor=134.17.0.3
#recursor=212.98.160.50 8.8.8.8 8.8.4.4 82.209.240.241
#recursor=8.8.4.4
#recursor=198.41.0.4
#recursor=192.228.79.201
#recursor=192.33.4.12
#recursor=199.7.91.13
#recursor=192.203.230.10
#recursor=192.5.5.241
#recursor=192.112.36.4
#recursor=128.63.2.53
#recursor=192.36.148.17
#recursor=192.58.128.30
#recursor=193.0.14.129
#recursor=199.7.83.42
#recursor=202.12.27.33
#################################
# also-notify   When notifying a domain, also notify these nameservers
#
# also-notify=

#################################
# any-to-tcp    Answer ANY queries with tc=1, shunting to TCP
#
# any-to-tcp=no

#################################
# cache-ttl     Seconds to store packets in the PacketCache
cache-ttl=20000

#################################
# carbon-interval       Number of seconds between carbon (graphite) updates
#
# carbon-interval=30

#################################
# carbon-ourname        If set, overrides our reported hostname for carbon stats
#
# carbon-ourname=

#################################
# carbon-server If set, send metrics in carbon (graphite) format to this server
#
# carbon-server=

#################################
# chroot        If set, chroot to this directory for more security
#
# chroot=

#################################
# config-dir    Location of configuration directory (pdns.conf)
#
# config-dir=/usr/local/etc

#################################
# config-name   Name of this virtual configuration - will rename the binary image
#
# config-name=

#################################
# control-console       Debugging switch - don't use
#
control-console=no

#################################
# daemon        Operate as a daemon
#
#daemon=yes

#################################
# default-ksk-algorithms        Default KSK algorithms
#
# default-ksk-algorithms=rsasha256

#################################
# default-ksk-size      Default KSK size (0 means default)
#
# default-ksk-size=0

#################################
# default-soa-mail      mail address to insert in the SOA record if none set in the backend
#
# default-soa-mail=

#################################
# default-soa-name      name to insert in the SOA record if none set in the backend
#
default-soa-name=powerdnstest.tech.mts.by

#################################
# default-ttl   Seconds a result is valid if not set otherwise
#
default-ttl=3600

#################################
# default-zsk-algorithms        Default ZSK algorithms
#
# default-zsk-algorithms=rsasha256

#################################
# default-zsk-size      Default ZSK size (0 means default)
#
# default-zsk-size=0

#################################
# direct-dnskey Fetch DNSKEY RRs from backend during DNSKEY synthesis
#
# direct-dnskey=no

#################################
# disable-axfr  Disable zonetransfers but do allow TCP queries
#
# disable-axfr=no

#################################
# disable-axfr-rectify  Disable the rectify step during an outgoing AXFR. Only required for regression testing.
#
# disable-axfr-rectify=no

#################################
# disable-tcp   Do not listen to TCP queries
#
# disable-tcp=no

#################################
# distributor-threads   Default number of Distributor (backend) threads to start
#
# distributor-threads=3

#################################
# do-ipv6-additional-processing Do AAAA additional processing
#
# do-ipv6-additional-processing=yes

#################################
# edns-subnet-processing        If we should act on EDNS Subnet options
#
# edns-subnet-processing=no

#################################
# entropy-source        If set, read entropy from this file
#
# entropy-source=/dev/urandom

#################################
# experimental-api-key  REST API Static authentication key (required for API use)
#
# experimental-api-key=

#################################
# experimental-api-readonly     If the JSON API should disallow data modification
#
# experimental-api-readonly=no

#################################
# experimental-dname-processing If we should support DNAME records
#
# experimental-dname-processing=no

#################################
# experimental-dnsupdate        Enable/Disable DNS update (RFC2136) support. Default is no.
#
# experimental-dnsupdate=no

#################################
# experimental-json-interface   If the webserver should serve JSON data
#
# experimental-json-interface=no

#################################
# experimental-logfile  Filename of the log file for JSON parser
#
# experimental-logfile=/var/log/pdns.log

#################################
# forward-dnsupdate     A global setting to allow DNS update packages that are for a Slave domain, to be forwarded to the master.
#
# forward-dnsupdate=yes

#################################
# guardian      Run within a guardian process
#
#guardian=no

#################################
# include-dir   Include *.conf files from this directory
#
# include-dir=

#################################
# launch        Which backends to launch and order to query them in
#
# launch=

#################################
# load-modules  Load this module - supply absolute or relative path
#
# load-modules=

#################################
# local-address Local IP addresses to which we bind
#
# local-address=0.0.0.0

#################################
# local-address-nonexist-fail   Fail to start if one or more of the local-address's do not exist on this server
#
# local-address-nonexist-fail=yes

#################################
# local-ipv6    Local IP address to which we bind
#
# local-ipv6=

#################################
# local-ipv6-nonexist-fail      Fail to start if one or more of the local-ipv6 addresses do not exist on this server
#
# local-ipv6-nonexist-fail=yes

#################################
# local-port    The port on which we listen
#
# local-port=53

#################################
# log-dns-details       If PDNS should log DNS non-erroneous details
#
# log-dns-details=no
#log-dns-details=/var/log/pdns/pdns-details.log
#log-failed-updates=/var/log/pdns/pdns-fail.log
#logfile=/var/log/pdns/pdns.log
#################################
# log-dns-queries       If PDNS should log all incoming DNS queries
#
log-dns-queries=yes

#################################
# logging-facility      Log under a specific facility
#
logging-facility=0

#################################
# loglevel      Amount of logging. Higher is more. Do not set below 3
#

#logfile=/var/log/pdns/pdns.log
#logfile=/etc/pdns/
loglevel=9

#################################
# lua-prequery-script   Lua script with prequery handler
#
# lua-prequery-script=

#################################
# master        Act as a master
#
# master=no

#################################
# max-cache-entries     Maximum number of cache entries
#
# max-cache-entries=1000000

#################################
# max-ent-entries       Maximum number of empty non-terminals in a zone
#
# max-ent-entries=100000

#################################
# max-nsec3-iterations  Limit the number of NSEC3 hash iterations
#
# max-nsec3-iterations=500

#################################
# max-queue-length      Maximum queuelength before considering situation lost
#
max-queue-length=5000

#################################
# max-signature-cache-entries   Maximum number of signatures cache entries
#
# max-signature-cache-entries=

#################################
#################################
# max-tcp-connections   Maximum number of TCP connections
#
max-tcp-connections=20

#################################
# module-dir    Default directory for modules
#
# module-dir=/usr/local/lib/pdns

#################################
# negquery-cache-ttl    Seconds to store negative query results in the QueryCache
#
# negquery-cache-ttl=60

#################################
# no-shuffle    Set this to prevent random shuffling of answers - for regression testing
#
# no-shuffle=off

#################################
# only-notify   Only send AXFR NOTIFY to these IP addresses or netmasks
#
# only-notify=0.0.0.0/0,::/0

#################################
# out-of-zone-additional-processing     Do out of zone additional processing
#
# out-of-zone-additional-processing=yes

#################################
# overload-queue-length Maximum queuelength moving to packetcache only
#
# overload-queue-length=0

#################################
# pipebackend-abi-version       Version of the pipe backend ABI
#
# pipebackend-abi-version=1
#################################
# prevent-self-notification     Don't send notifications to what we think is ourself
#
# prevent-self-notification=yes

#################################
# query-cache-ttl       Seconds to store query results in the QueryCache
#
# query-cache-ttl=20

#################################
# query-local-address   Source IP address for sending queries
#
# query-local-address=0.0.0.0

#################################
# query-local-address6  Source IPv6 address for sending queries
#
# query-local-address6=::

#################################
# query-logging Hint backends that queries should be logged
#
# query-logging=no

#################################
# queue-limit   Maximum number of milliseconds to queue a query
#
# queue-limit=1500

#################################
# receiver-threads      Default number of receiver threads to start
#
# receiver-threads=1

#################################
# recursive-cache-ttl   Seconds to store packets for recursive queries in the PacketCache
#
# recursive-cache-ttl=10

#################################
# recursor      If recursion is desired, IP address of a recursing nameserver
#
# recursor=no

#################################
# retrieval-threads     Number of AXFR-retrieval threads for slave operation
#
# retrieval-threads=2

#################################
# reuseport     Enable higher performance on compliant kernels by using SO_REUSEPORT allowing each receiver thread to open its own socket
#
# reuseport=no

#################################
# security-poll-suffix  Domain name from which to query security update notifications
#
# security-poll-suffix=secpoll.powerdns.com.

#################################
# send-root-referral    Send out old-fashioned root-referral instead of ServFail in case of no authority
#
# send-root-referral=no

#################################
# server-id     Returned when queried for 'server.id' TXT or NSID, defaults to hostname - disabled or custom
#
# server-id=

#################################
# setgid        If set, change group id to this gid for more security
#
# setgid=

#################################
# setuid        If set, change user id to this uid for more security
#
# setuid=

#################################
# signing-threads       Default number of signer threads to start
#
#
# signing-threads=3

#################################
# slave Act as a slave
#
# slave=no

#################################
# slave-cycle-interval  Schedule slave freshness checks once every .. seconds
#
# slave-cycle-interval=60

#################################
# slave-renotify        If we should send out notifications for slaved updates
#
# slave-renotify=no

#################################
# soa-expire-default    Default SOA expire
#
# soa-expire-default=604800

#################################
# soa-minimum-ttl       Default SOA minimum ttl
#
# soa-minimum-ttl=3600

#################################
# soa-refresh-default   Default SOA refresh
#
# soa-refresh-default=10800

#################################
# soa-retry-default     Default SOA retry
#
# soa-retry-default=3600
#################################
# socket-dir    Where the controlsocket will live
#
# socket-dir=/var/run

#################################
# tcp-control-address   If set, PowerDNS can be controlled over TCP on this address
#
# tcp-control-address=

#################################
# tcp-control-port      If set, PowerDNS can be controlled over TCP on this address
#
# tcp-control-port=53000

#################################
# tcp-control-range     If set, remote control of PowerDNS is possible over these networks only
#
# tcp-control-range=127.0.0.0/8, 10.0.0.0/8, 192.168.0.0/16, 172.16.0.0/12, ::1/128, fe80::/10

#################################
# tcp-control-secret    If set, PowerDNS can be controlled over TCP after passing this secret
#
# tcp-control-secret=

#################################
# traceback-handler     Enable the traceback handler (Linux only)
#
# traceback-handler=yes

#################################
# trusted-notification-proxy    IP address of incoming notification proxy
#
# trusted-notification-proxy=

#################################
# udp-truncation-threshold      Maximum UDP response size before we truncate
#
# udp-truncation-threshold=1680
#################################
# version-string        PowerDNS version in packets - full, anonymous, powerdns or custom
#
# version-string=full

#################################
# webserver     Start a webserver for monitoring
#
# webserver=no

#################################
# webserver-address     IP Address of webserver to listen on
#
# webserver-address=127.0.0.1

#################################
# webserver-allow-from  Webserver access is only allowed from these subnets
#
# webserver-allow-from=0.0.0.0/0,::/0

#################################
# webserver-password    Password required for accessing the webserver
#
# webserver-password=

#################################
# webserver-port        Port of webserver to listen on
#
# webserver-port=8081

#################################
# webserver-print-arguments     If the webserver should print arguments
#
# webserver-print-arguments=no

Перезагружаемся

service pdns restart

Проце
Описание конфигурации PowerDNS authoritative v4.x

9) Устанавливаем рекурсивный DNS

yum install pdns-recursor -y
vi /etc/pdns-recursor/recursor.conf

chkconfig pdns-recursor on
service pdns-recursor start

v4.0.0 Через репозиторий powerdns

curl -o /etc/yum.repos.d/powerdns-rec-40.repo https://repo.powerdns.com/repo-files/centos-rec-40.repo
yum install pdns-recursor

10) Установка веб интерфейса администратора
Подготовительные действия.

yum -y install httpd php php-devel php-gd php-imap php-ldap php-mysql php-odbc php-pear  php-xml php-xmlrpc php-mbstring php-mcrypt php-mhash gettext -y
chkconfig --levels 235 httpd on
systemctl enable httpd.service
systemctl start httpd.service
service httpd start
yum -y install php-pear-DB php-pear-MDB2-Driver-mysql -y

Настраиваем apache

vi /etc/httpd/conf/httpd.conf

Открываем доступ к веб GUI

Моя конфигурация apache

#
# This is the main Apache HTTP server configuration file.  It contains the
# configuration directives that give the server its instructions.
# See <URL:http://httpd.apache.org/docs/2.4/> for detailed information.
# In particular, see 
# <URL:http://httpd.apache.org/docs/2.4/mod/directives.html>
# for a discussion of each configuration directive.
#
# Do NOT simply read the instructions in here without understanding
# what they do.  They're here only as hints or reminders.  If you are unsure
# consult the online docs. You have been warned.  
#
# Configuration and logfile names: If the filenames you specify for many
# of the server's control files begin with "/" (or "drive:/" for Win32), the
# server will use that explicit path.  If the filenames do *not* begin
# with "/", the value of ServerRoot is prepended -- so 'log/access_log'
# with ServerRoot set to '/www' will be interpreted by the
# server as '/www/log/access_log', where as '/log/access_log' will be
# interpreted as '/log/access_log'.

#
# ServerRoot: The top of the directory tree under which the server's
# configuration, error, and log files are kept.
#
# Do not add a slash at the end of the directory path.  If you point
# ServerRoot at a non-local disk, be sure to specify a local disk on the
# Mutex directive, if file-based mutexes are used.  If you wish to share the
# same ServerRoot for multiple httpd daemons, you will need to change at
# least PidFile.
#
ServerRoot "/etc/httpd"

#
# Listen: Allows you to bind Apache to specific IP addresses and/or
# ports, instead of the default. See also the <VirtualHost>
# directive.
#
# Change this to Listen on specific IP addresses as shown below to 
# prevent Apache from glomming onto all bound IP addresses.
#
#Listen 12.34.56.78:80
Listen 80

#
# Dynamic Shared Object (DSO) Support
#
# To be able to use the functionality of a module which was built as a DSO you
# have to place corresponding `LoadModule' lines at this location so the
# directives contained in it are actually available _before_ they are used.
# Statically compiled modules (those listed by `httpd -l') do not need
# to be loaded here.
#
# Example:
# LoadModule foo_module modules/mod_foo.so
#
Include conf.modules.d/*.conf

#
# If you wish httpd to run as a different user or group, you must run
# httpd as root initially and it will switch.  
#
# User/Group: The name (or #number) of the user/group to run httpd as.
# It is usually good practice to create a dedicated user and group for
# running httpd, as with most system services.
#
User apache
Group apache

# 'Main' server configuration
#
# The directives in this section set up the values used by the 'main'
# server, which responds to any requests that aren't handled by a
# <VirtualHost> definition.  These values also provide defaults for
# any <VirtualHost> containers you may define later in the file.
#
# All of these directives may appear inside <VirtualHost> containers,
# in which case these default settings will be overridden for the
# virtual host being defined.
#

#
# ServerAdmin: Your address, where problems with the server should be
# e-mailed.  This address appears on some server-generated pages, such
# as error documents.  e.g. [e-mail]
#
ServerAdmin root@localhost

#
# ServerName gives the name and port that the server uses to identify itself.
# This can often be determined automatically, but we recommend you specify
# it explicitly to prevent problems during startup.
#
# If your host doesn't have a registered DNS name, enter its IP address here.
#
#ServerName www.example.com:80

#
# Deny access to the entirety of your server's filesystem. You must
# explicitly permit access to web content directories in other 
# <Directory> blocks below.
#
<Directory />
    AllowOverride none
    Require all denied
</Directory>

#
# Note that from this point forward you must specifically allow
# particular features to be enabled - so if something's not working as
# you might expect, make sure that you have specifically enabled it
# below.
#

#
# DocumentRoot: The directory out of which you will serve your
# documents. By default, all requests are taken from this directory, but
# symbolic links and aliases may be used to point to other locations.
#
DocumentRoot "/var/www/html"

#
# Relax access to content within /var/www.
#
<Directory "/var/www">
    AllowOverride None
    # Allow open access:
    Require all granted
</Directory>

# Further relax access to the default document root:
<Directory "/var/www/html">
    #
    # Possible values for the Options directive are "None", "All",
    # or any combination of:
    #   Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews
    #
    # Note that "MultiViews" must be named *explicitly* --- "Options All"
    # doesn't give it to you.
    #
    # The Options directive is both complicated and important.  Please see
    # http://httpd.apache.org/docs/2.4/mod/core.html#options
    # for more information.
    #
    Options Indexes FollowSymLinks

    #
    # AllowOverride controls what directives may be placed in .htaccess files.
    # It can be "All", "None", or any combination of the keywords:
    #   Options FileInfo AuthConfig Limit
    #
    AllowOverride None

    #
    # Controls who can get stuff from this server.
    #
    Require all granted
</Directory>


<Directory "/var/www/html/powerdns/">
Order deny,allow
deny from all
allow from 217.21.61.8
allow from 10.128.71.3
allow from 10.135.55.4
allow from 46.216.24.152
</Directory>


#
# DirectoryIndex: sets the file that Apache will serve if a directory
# is requested.
#
<IfModule dir_module>
    DirectoryIndex index.html
</IfModule>

#
# The following lines prevent .htaccess and .htpasswd files from being 
# viewed by Web clients. 
#
<Files ".ht*">
    Require all denied
</Files>

#
# ErrorLog: The location of the error log file.
# If you do not specify an ErrorLog directive within a <VirtualHost>
# container, error messages relating to that virtual host will be
# logged here.  If you *do* define an error logfile for a <VirtualHost>
# container, that host's errors will be logged there and not here.
#
ErrorLog "logs/error_log"

#
# LogLevel: Control the number of messages logged to the error_log.
# Possible values include: debug, info, notice, warn, error, crit,
# alert, emerg.
#
LogLevel warn

<IfModule log_config_module>
    #
    # The following directives define some format nicknames for use with
    # a CustomLog directive (see below).
    #
    LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
    LogFormat "%h %l %u %t \"%r\" %>s %b" common

    <IfModule logio_module>
      # You need to enable mod_logio.c to use %I and %O
      LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio
    </IfModule>

    #
    # The location and format of the access logfile (Common Logfile Format).
    # If you do not define any access logfiles within a <VirtualHost>
    # container, they will be logged here.  Contrariwise, if you *do*
    # define per-<VirtualHost> access logfiles, transactions will be
    # logged therein and *not* in this file.
    #
    #CustomLog "logs/access_log" common

    #
    # If you prefer a logfile with access, agent, and referer information
    # (Combined Logfile Format) you can use the following directive.
    #
    CustomLog "logs/access_log" combined
</IfModule>

<IfModule alias_module>
    #
    # Redirect: Allows you to tell clients about documents that used to 
    # exist in your server's namespace, but do not anymore. The client 
    # will make a new request for the document at its new location.
    # Example:
    # Redirect permanent /foo http://www.example.com/bar

    #
    # Alias: Maps web paths into filesystem paths and is used to
    # access content that does not live under the DocumentRoot.
    # Example:
    # Alias /webpath /full/filesystem/path
    #
    # If you include a trailing / on /webpath then the server will
    # require it to be present in the URL.  You will also likely
    # need to provide a <Directory> section to allow access to
    # the filesystem path.

    #
    # ScriptAlias: This controls which directories contain server scripts. 
    # ScriptAliases are essentially the same as Aliases, except that
    # documents in the target directory are treated as applications and
    # run by the server when requested rather than as documents sent to the
    # client.  The same rules about trailing "/" apply to ScriptAlias
    # directives as to Alias.
    #
    ScriptAlias /cgi-bin/ "/var/www/cgi-bin/"

</IfModule>

#
# "/var/www/cgi-bin" should be changed to whatever your ScriptAliased
# CGI directory exists, if you have that configured.
#
<Directory "/var/www/cgi-bin">
    AllowOverride None
    Options None
    Require all granted
</Directory>

<IfModule mime_module>
    #
    # TypesConfig points to the file containing the list of mappings from
    # filename extension to MIME-type.
    #
    TypesConfig /etc/mime.types

    #
    # AddType allows you to add to or override the MIME configuration
    # file specified in TypesConfig for specific file types.
    #
    #AddType application/x-gzip .tgz
    #
    # AddEncoding allows you to have certain browsers uncompress
    # information on the fly. Note: Not all browsers support this.
    #
    #AddEncoding x-compress .Z
    #AddEncoding x-gzip .gz .tgz
    #
    # If the AddEncoding directives above are commented-out, then you
    # probably should define those extensions to indicate media types:
    #
    AddType application/x-compress .Z
    AddType application/x-gzip .gz .tgz

    #
    # AddHandler allows you to map certain file extensions to "handlers":
    # actions unrelated to filetype. These can be either built into the server
    # or added with the Action directive (see below)
    #
    # To use CGI scripts outside of ScriptAliased directories:
    # (You will also need to add "ExecCGI" to the "Options" directive.)
    #
    #AddHandler cgi-script .cgi

    # For type maps (negotiated resources):
    #AddHandler type-map var

    #
    # Filters allow you to process content before it is sent to the client.
    #
    # To parse .shtml files for server-side includes (SSI):
    # (You will also need to add "Includes" to the "Options" directive.)
    #
    AddType text/html .shtml
    AddOutputFilter INCLUDES .shtml
</IfModule>

#
# Specify a default charset for all content served; this enables
# interpretation of all content as UTF-8 by default.  To use the 
# default browser choice (ISO-8859-1), or to allow the META tags
# in HTML content to override this choice, comment out this
# directive:
#
AddDefaultCharset UTF-8

<IfModule mime_magic_module>
    #
    # The mod_mime_magic module allows the server to use various hints from the
    # contents of the file itself to determine its type.  The MIMEMagicFile
    # directive tells the module where the hint definitions are located.
    #
    MIMEMagicFile conf/magic
</IfModule>

#
# Customizable error responses come in three flavors:
# 1) plain text 2) local redirects 3) external redirects
#
# Some examples:
#ErrorDocument 500 "The server made a boo boo."
#ErrorDocument 404 /missing.html
#ErrorDocument 404 "/cgi-bin/missing_handler.pl"
#ErrorDocument 402 http://www.example.com/subscription_info.html
#

#
# EnableMMAP and EnableSendfile: On systems that support it, 
# memory-mapping or the sendfile syscall may be used to deliver
# files.  This usually improves server performance, but must
# be turned off when serving from networked-mounted 
# filesystems or if support for these functions is otherwise
# broken on your system.
# Defaults if commented: EnableMMAP On, EnableSendfile Off
#
#EnableMMAP off
EnableSendfile on

# Supplemental configuration
#
# Load config files in the "/etc/httpd/conf.d" directory, if any.
IncludeOptional conf.d/*.conf

Перезагружаем apache.

service httpd restart

11) Загружаем последнюю версию PowerAdmin с сайта www.poweradmin.org
Я использовал версию 2.1.7

cd /root
wget  -O poweradmin.zip https://github.com/poweradmin/poweradmin/archive/master.zip  -c
unzip poweradmin.zip -d /var/www/html/
mv /var/www/html/poweradmin* /var/www/html/poweradmin
chown -R apache:apache /var/www/html/poweradmin/
cp /var/www/html/poweradmin/inc/config-me.inc.php /var/www/html/poweradmin/inc/config.inc.php
vi /var/www/html/poweradmin/inc/config.inc.php

В этом файле меняются строки:
$db_host = 'localhost';
$db_port = '3306';
$db_user = 'imperituroard';
$db_pass = 'password';
$db_name = 'powerdns';
$db_type = 'mysql';

Меняем Default session encryption key

$session_key = 'fg234v95ms@4n)kf!kje%7vh*eved';

Мой файл config.inc.php

<?php

/**
 * Sample configuration file with default values
 *
 * @package     Poweradmin
 * @copyright   2007-2010 Rejo Zenger <[e-mail]>
 * @copyright   2010-2014 Poweradmin Development Team
 * @license     http://opensource.org/licenses/GPL-3.0 GPL
 */
// NOTE: Do not edit this file, otherwise it's very likely your changes 
// will be overwritten with an upgrade.  
// Instead, create the file "inc/config.inc.php" and set the variables you
// want to set there. Your changes will override the defaults provided by us.
// Better description of available configuration settings you can find here:
// <https://github.com/poweradmin/poweradmin/wiki/Configuration-File>
// Database settings
$db_host = 'localhost';
$db_port = '3306';
$db_user = 'imperituroard';
$db_pass = 'password';
$db_name = 'powerdns';
$db_type = 'mysql';
//$db_file		= '';		# used only for SQLite, provide full path to database file
//$db_debug		= false;	# show all SQL queries
$db_layer		= 'PDO';	# or MDB2
//$db_ssl_ca            = '';
// Security settings
// This should be changed upon install
$session_key = 'fg234v95ms@4n)kf!kje%7vh*eved';
$password_encryption = 'md5'; // or md5salt

// Interface settings
$iface_lang = 'en_EN';
$iface_style = 'example';
$iface_rowamount = 50;
$iface_expire = 1800;
$iface_zonelist_serial = false;
$iface_title = 'Poweradmin';
$iface_add_reverse_record = true;

// Predefined DNS settings
$dns_hostmaster = '';
$dns_ns1 = '';
$dns_ns2 = '';
$dns_ttl = 86400;
$dns_fancy = false;
$dns_strict_tld_check = false;
$dns_top_level_tld_check = false;     // Don't allow to create top level TLDs
$dns_third_level_check = false;
// Timezone settings
// See <http://www.php.net/manual/en/timezones.php> for help.
//$timezone		= 'UTC';
// Logging settings
// Syslog usage - writes authentication attempts to syslog
// This facility could be used in combination with fail2ban to
// ban IPs with break-in attempts
$syslog_use = false;
$syslog_ident = 'poweradmin';
// On Windows usually only LOG_USER is available
$syslog_facility = LOG_USER;

// PowerDNSSEC settings
$pdnssec_use = false;
$pdnssec_command = '/usr/bin/pdnssec';

// LDAP settings
$ldap_use = false;
$ldap_debug = false;
$ldap_uri = 'ldap://domaincontroller.example.com';
$ldap_basedn = 'OU=Users,DC=example,DC=com';
$ldap_binddn = 'GROUP\lookupuser';
$ldap_bindpw = 'some_password';
$ldap_user_attribute = 'sAMAccountName';
$ldap_proto = 3;

Перезагружаемся

service httpd restart
service pdns restart

12) Финальная настройка
Заходим по адресу 172.24.184.177/poweradmin/install/index.php
Где 172.24.184.177 — IP вашего сервера.
И вводим все предложенные данные.
После завершения установки, удаляем папку /var/www/html/poweradmin/install и заходим в веб интерфейс управления по
адресу 172.24.184.177/poweradmin/index.php
При настройке, есть несколько особенностей:
-при вводе сервера, где находится база, следует вводить localhost а не 127.0.0.1
-следует обязательно создавать пользователя с ограниченными правами на последнем шаге, в противном случае у админа будут ограниченные права.
А вот так выглядит веб интерфейс (есть русский язык):


13) Литература
Управление демоном pdns Для v3.x
Описание взаимодействий в ДНС иерархии

P.S. Эта статья — первая часть моего рассказа. В следующей части я расскажу про дальнейшие настройки, для оптимизации производительности и пр.