DishantK1807 / dns-bind-script

This repository contains the script for installing a DNS Bind Server on Ubuntu Machine

dns-bind-script

This repository contains the script for installing a DNS Bind Server on an Ubuntu Machine.

Steps for editing the files

• Editing named.conf.options file

  1. Add all the private IPs in the acl "trusted" tag. An example is mentioned in the file.
  2. Next, under the options tag find the listen-on option and update it with the Private IP for the primary DNS server.
  3. If we have a secondary DNS server, we need to find the allow-transfer under the options tag and replace the none with the Private IP address of the secondary DNS server.

• Editing the named.conf.local file

  • Configure Forward lookup zone

    1. Next we need to do is update the DNS zones. named.conf.local already has the instructions to update for the forward and backward zone.
    2. For configuring the forward zone, replace the nyc3.example.com under the forward zone with your subdomain.
    3. Next, we need to update the filename wrt the subdomain and update the same under the file option under the zone.
    4. If we have a secondary DNS server, we need to find the allow-transfer under the options tag and replace the none with the Private IP address of the secondary DNS server. Our forward zone is configured now.

  • Configure the Reverse loopup zone

    1. Next we need to configure is our Reverse loopkup zone. Under the reverse zone change the 45.123 with the octet reversal of what your Private IP starts with. In the example the IP starts with 123.45, the octet reversal for which is 45.123
    2. Next, we need to update the filename wrt the octet reversal IP and update the same under the file option under the zone.
    3. If we have a secondary DNS server, we need to find the allow-transfer under the options tag and replace the none with the Private IP address of the secondary DNS server. Our reverse zone is configured now.

• Editing the Forward Zone file

  1. The forward zone file will be of the name db.nyc3.example.com. We need to update the filename wrt our subdomain.
  2. Update ns1.nyc3.example.com with the Private FQDN of the DNS server.
  3. Update nyc3.example.com with the subdomain.
  4. Under name server - NS records update with the DNS server name.
  5. Under name server - A records update with the DNS Servers name and IP.
  6. Under host server - A records update with the Host servers name and IP.

• Editing the Reverse Zone File

  1. The reverse zone file will be of the name db.45.123. We need to update the filename wrt our octet reversal IP.
  2. Update ns1.nyc3.example.com with the Private FQDN of the DNS server.
  3. Update nyc3.example.com with the subdomain.
  4. Under name servers update with DNS server name.
  5. Under PTR records update with DNS and host servers name and IPs.

• Editing the 00-private-nameservers.yaml file

  1. Update the name of the private network interface.
  2. Update the Private IP of the DNS server under addresses.
  3. Update the subdomain under search.

• Editing the script.sh file

  1. Update the file paths for the respective files.

Running the script

1. Update the execution permission on the file using the following command. sudo chmod +x script.sh
2. Run the script using the following command ./script.sh