bind dns server ubuntu 16.04

How to set bind as a default Resolver on Ubuntu?
Install the resolvconf package. To set BIND as the default resolver on Ubuntu 16.04 server, you need to edit the /etc/resolvconf/resolv.conf.d/head file and add “ nameserver 127.0.0.1 ” to this file, which can be done by running the following command:
Where can I install BIND DNS resolver?
You can install BIND DNS resolver on your home computer. It’s local to your home computer. You can install BIND DNS resolver on a cloud server, and it’s local to the cloud server. BIND (Berkeley Internet Name Domain) is an open-source DNS server software widely used on Unix/Linux due to it’s stability and high quality.
Does UFW allow BIND9 block DNS requests?
Using this tutorial with Ubuntu 18.04.4, ufw allow Bind9 will allow DNS requests to come into the server but will block DNS responses from requests that the server makes to the resolvers. To prevent those from being dropped, the following are needed:

Set Bind to IPv4 Mode

Set BIND to IPv4 mode, we will do that by editing the “/etc/default/bind9” file and adding “-4” to the OPTIONS variable: The edited file should look something like this: Now let’s configure ns1, our primary DNS server. linux.com

Configuring The Primary DNS Server

Edit the named.conf.options file: On top of the options block, add a new block called trusted.This list will allow the clients specified in it to send recursive DNS queries to our primary server: linux.com

Creating The Forward Zone File

Now we’ll create the directory where we will store our zone files in: We will use the sample db.local file to make our forward zone file, let’s copy the file first: Now edit the forward zone file we just copied: It should look something like the example below: Now let’s edit the SOA record. Replace localhost with your ns1 server’s FQDN, then replac

Creating The Reverse Zone File

We specify the PTR records for reverse DNS lookups in the reverse zone files. When the DNS server receives a PTR lookup query for an example for IP: “10.20.55.154”, it will check the reverse zone file to retrieve the FQDN of the IP address, in our case that would be “host1.test.example.com”. We will create a reverse zone file for every single rever

Check The Configuration Files

Use the following command to check the configuration syntax of all the named.conf files that we configured: If your configuration files don’t have any syntax problems, the output will not contain any error messages. However if you do have problems with your configuration files, compare the settings in the “Configuring the Primary DNS Server” sectio

Configuring The Secondary DNS Server

Setting up a secondary DNS server is always a good idea as it will serve as a failover and will respond to queries if the primary server is unresponsive. On ns2, edit the named.conf.options file: At the top of the file, add the ACL with the private IP addresses for all your trusted servers: Just like in the named.conf.options file for ns2, add the

Configure The DNS Clients

We will now configure the hosts in our 10.20.0.0/16 subnet to use the ns1 and ns2 servers as their primary and secondary DNS servers. This greatly depends on the OS the hosts are running but for most Linux distributions the settings that need to be changed reside in the /etc/resolv.conf file. Generally on the Ubuntu, Debian and CentOS distributions

Adding A New Host to Your DNS Servers

If you need to add a host to your DNS servers just follow the steps below: On the ns1 nameserver do the following: 1. Create an A record in the forward zone file for the host and increment the value of the Serial variable. 2. Create a PTR record in the reverse zone file for the host and increment the value of the Serial variable. 3. Add your host’s

Removing A Existing Host from Your DNS Servers

If you want to remove the host from your DNS servers just undo the steps above. Note: Please subsitute the names and IP addresses used in this tutorial for the names and IP addresses of the hosts in your own private network. linux.com

How to Install and Configure DNS Server in Ubuntu (Linux)

Setting up a Bind DNS server on Ubuntu server

Configuring and testing a DNS server on Ubuntu

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