Instalar Servidor DNS (Bind9)

Ubuntu 20.04 = 10.10.20.10 Nombre del domimio = vm.enunpimpam.com Red = 10.10.20.0/24

Instalar Bind 9

apt-get install bind9 bind9utils bind9-doc dnsutils

Configurar Bind9

/etc/bind/named.conf.options

nano /etc/bind/named.conf.options

options {
        directory "/var/cache/bind";
        auth-nxdomain no;    # conform to RFC1035
     // listen-on-v6 { any; };
        listen-on port 53 { localhost; 10.10.20.0/24; };
        allow-query { localhost; 10.10.20.0/24; };
        forwarders { 8.8.8.8; };
        recursion yes;
        };

/etc/bind/named.conf.local

nano /etc/bind/named.conf.local

zone    "vm.enunpimpam.com"   {
        type master;
        file    "/etc/bind/forward.vm.enunpimpam.com";
 };

zone   "20.10.10.in-addr.arpa"        {
       type master;
       file    "/etc/bind/reverse.vm.enunpimpam.com";
 };

Zona directa

cp db.local forward.vm.enunpimpam.com
nano forward.vm.enunpimpam.com

;
; BIND data file for local loopback interface
;
$TTL    604800
@       IN      SOA     localhost. root.localhost. (
                              2         ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800 )       ; Negative Cache TTL
;Name Server Information
@       IN      NS      primary.vm.enunpimpam.com.

;IP address of Your Domain Name Server(DNS)
primary IN       A      10.10.20.10

;Mail Server MX (Mail exchanger) Record
vm.enunpimpam.com. IN  MX  10  mail.vm.enunpimpam.com.

;A Record for Host names
capi    IN       A       10.10.20.128
thor    IN       A       10.10.20.129
mail    IN       A       10.10.20.130

;CNAME Record
ftp     IN      CNAME   capi.vm.enunpimpam.com.

El PUNTO después de cada dominio

Zona Inversa

cp db.127 reverse.vm.enunpimpam.com
nano reverse.vm.enunpimpam.com

;
; BIND reverse data file for local loopback interface
;
$TTL    604800
@       IN      SOA     localhost. root.vm.enunpimpam.com. (
                              1         ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800 )       ; Negative Cache TTL
;Your Name Server Info
@       IN      NS      primary.vm.enunpimpam.com.
primary IN      A       10.10.20.10

;Reverse Lookup for Your DNS Server
10      IN      PTR     primary.vm.enunpimpam.com.

;PTR Record IP address to HostName
128      IN      PTR     capi.vm.enunpimpam.com.
129      IN      PTR     thor.vm.enunpimpam.com.
130      IN      PTR     mail.vm.enunpimpam.com.

El PUNTO después de cada dominio