CentOS 7.x deployment of master and slave DNS servers

1. Preparation

Example: Two machines: 192.168.219.146 (master), 192.168.219.147 (slave), domain name www.panyangduola.com

Both the master and slave DNS servers need to install bind, bind-chroot, and bind-utils

yum -y install bind bind-utils bind-chroot

If the firewall is enabled, configure the firewall and add services (ignore if the firewall is disabled)

firewall-cmd --permanent --add-service=dns
firewall-cmd --reload

2. Primary DNS server (192.168.219.146) configuration

Editing the Configuration File

vim /etc/named.conf

Find two of the lines

listen-on port 53 { 127.0.0.1; };
allow-query { localhost; };

Modified to

listen-on port 53 { any; };
allow-query { any; };

2-1. Configure forward parsing

Edit the file /etc/named.rfc1912.zones and add the domain to be resolved at the end

vim /etc/named.rfc1912.zones
zone "panyangduola.com" IN {
  type master;
  file "data/panyangduola.com.zone";
};

Create panyangduola.com.zone resolution domain

vim /var/named/data/panyangduola.com.zone
$TTL 3600
$ORIGIN panyangduola.com.
@ IN SOA panyangduola.com. admin.panyangduola.com. (
  2018042101
  1D
  1H
  1W
  3H
)
@ IN NS ns1.panyangduola.com.
@ IN NS ns2.panyangduola.com.
ns1 IN A 192.168.219.146
ns2 IN A 192.168.219.147
www IN A 192.168.219.146
web IN CNAME www

2-2. Configure reverse resolution

Edit the file /etc/named.rfc1912.zones and add the domain to be resolved at the end

vim /etc/named.rfc1912.zones
zone "219.168.192.in-addr.arpa" IN {
   type master;
   file "data/219.168.192.zone"; 
};

Create 219.168.192.zone resolution domain

vim /var/named/data/219.168.192.zone
$TTL 3600
$ORIGIN 219.168.192.in-addr.arpa.
@ IN SOA panyangduola.com. admin.panyangduola.com. (
  2018042101
  1D
  1H
  1W
  3H
)
@ IN NS ns1.panyangduola.com.
@ IN NS ns2.panyangduola.com.
146 IN PTR ns1.panyangduola.com.
147 IN PTR ns2.panyangduola.com.
146 IN PTR www.panyangduola.com.

2-3. Perform a syntax check on the DNS configuration file:

cd /etc
named-checkconf named.conf
named-checkconf named.rfc1912.zones
cd /var/named/data
named-checkzone panyangduola.com panyangduola.com.zone
named-checkzone 219.168.192.in-addr.arpa 219.168.192.zone

2-4. Edit /etc/resolv.conf and add

vim /etc/resolv.conf
search localdomain
nameserver 192.168.219.146

2-5. If no error occurs in step 2-3, start the named service

Restart named

systemctl restart named

View Status

systemctl status named

2-6. Check whether the primary DNS server resolution is successful

Ping command verification

ping -c 4 www.panyangduola.com
nslookup command verification nslookup
>www.panyangduola.com
nslookup
>192.168.219.146

3. Configure from DNS server (192.168.219.147)

Edit named.conf File

vim /etc/named.conf

Find two of the lines

listen-on port 53 { 127.0.0.1; };　
  allow-query { localhost; };

Modified to

listen-on port 53 { any; };
allow-query { any; };

3-1. Modify the configuration of the primary DNS server (192.168.219.146) /etc/named.rfc1912.zones

vim /etc/named.rfc1912.zones
zone "panyangduola.com" IN {
  type master;
  file "data/panyangduola.com.zone";
  allow-transfer {192.168.219.147;};
  notify yes;
  also-notify {192.168.219.147;};
};
zone "219.168.192.in-addr.arpa" IN {
  type master;
  file "data/219.168.192.zone";
  allow-transfer {192.168.219.147;}; 
  notify yes; 
  also-notify {192.168.219.147;}; 
};

3-2. Configure forward resolution from the DNS server (192.168.219.147)

Edit the file /etc/named.rfc1912.zones and add the domain to be resolved at the end

vim /etc/named.rfc1912.zones
zone "panyangduola.com" IN {
  type slave;
  file "data/panyangduola.com.zone";
  masters { 192.168.219.146; };
};

Create an empty file for panyangduola.com.zone

touch /var/named/data/panyangduola.com.zone

Set Owner

cd /var/named/data
chown named:named panyangduola.com.zone

3-3. Configure reverse resolution from the DNS server (192.168.219.147)

Add in the file /etc/named.rfc1912.zones

vim etc/named.rfc1912.zones
zone "219.168.192.in-addr.arpa" IN {
 type slave;
 file "data/219.168.192.zone";
 masters { 192.168.219.146; };　
  };

Create an empty file 219.168.192.zone

touch /var/named/data/219.168.192.zone

Set Owner

cd /var/named/data
chown named:named 219.168.192.zone

3-4. Perform a syntax check on the DNS configuration file:

cd /etc
named-checkconf named.conf
named-checkconf named.rfc1912.zones

3-5. Edit /etc/resolv.conf and add

vim /etc/resolv.conf
search localdomain
nameserver 192.168.219.147

3-6. If no error occurs in step 3-4, start the named service

Restart named

systemctl restart named

View Status

systemctl status named

3-7. Check whether the files /var/named/data/panyangduola.com.zone and /var/named/data/219.168.192.zone contain binary data

cat /var/named/data/panyangduola.com.zone
cat /var/named/data/219.168.192.zone

3-8. Check whether the resolution from the DNS server is successful

Ping command verification ping -c 4 www.panyangduola.com
nslookup command verification nslookup
>192.168.219.147

Summarize

The above is what I introduced to you about the deployment of master and slave DNS servers in centos7.x. I hope it will be helpful to you. If you have any questions, please leave me a message and I will reply to you in time. I would also like to thank everyone for their support of the 123WORDPRESS.COM website!
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