How To Set Caching DNS Server

To set up a caching DNS server, you will need to install and configure a DNS server software that supports caching, such as BIND or Unbound.

Here are the basic steps for setting up a caching DNS server using BIND:

1. Install BIND:

sudo apt install bind9

2. Configure BIND to listen on all interfaces by modifying the options block in the /etc/bind/named.conf file:

options {
    listen-on { any; };
    ...
};

3. Enable recursive queries by adding the following to the options block:

allow-recursion { any; };

4. Restart the BIND service to apply the changes:

sudo service bind9 restart

To set up a caching DNS server using Unbound, you can follow a similar process:

1. Install Unbound:

sudo apt install unbound

2. Configure Unbound to listen on all interfaces by modifying the interface option in the /etc/unbound/unbound.conf file:

interface: 0.0.0.0

3. Enable recursive queries by adding the following to the unbound.conf file:

do-recursive-queries: yes

4. Restart the Unbound service to apply the changes:

sudo service unbound restart

Keep in mind that these are just basic instructions for setting up a caching DNS server. You may need to adjust the steps depending on your specific system and requirements. For more information on using BIND or Unbound, you can consult the documentation or seek guidance from the Linux community.