Des del 2000 compartiendo sobre…

Implementing Per-Domain DNS Configuration in macOS Using Resolver Configuration Files

Reading time: 3 – 4 minutes

In macOS, managing network traffic is essential for a robust and secure IT infrastructure. The operating system allows users to have a granular level of control over Domain Name System (DNS) settings, improving network functionality. Today’s post will walk through setting up per-domain DNS configuration on macOS using resolver configuration files.

Adding a DNS Rule Per Domain

MacOS has a powerful feature that allows you to specify DNS servers for individual domains. This is accomplished by creating resolver configuration files in the /etc/resolver/ directory. Each file in this directory corresponds to a domain and specifies the DNS servers to be used for that domain.

Let’s add a DNS rule for the “ymbihq.local” domain:

  1. Open Terminal.
  2. Use the sudo command to create a new file in the /etc/resolver/ directory with the same name as your domain:
sudo bash -c 'echo "nameserver" > /etc/resolver/ymbihq.local'

This command will create a new resolver file named ymbihq.local and adds a line specifying as the nameserver. As a result, all DNS queries for “ymbihq.local” will be resolved by the DNS server at the IP address

Reviewing DNS Rules

To verify that the resolver configuration file was created successfully and to review its content, use the cat command:

cat /etc/resolver/ymbihq.local

This will output the contents of the ymbihq.local file, which should look like this:

# Sample output:

This confirms that the DNS server for the “ymbihq.local” domain has been set to

Removing a DNS Rule

If you need to remove a DNS rule, you can simply delete the corresponding resolver configuration file. Use the rm command for this:

sudo rm /etc/resolver/ymbihq.local

After running this command, your macOS system will no longer have a custom DNS server set for the “ymbihq.local” domain, and it will default to using your standard DNS servers.

By creating and managing resolver configuration files, you can precisely control your DNS settings on a per-domain basis. This powerful feature of macOS allows you to optimize your network to fit your specific needs.

Comments are closed.

Últimas entradas

Enhancing SSH Security with StealthSSHAccess

Reading time: 4 – 7 minutes In today’s interconnected world, maintaining the security of your server infrastructure is paramount. One critical point of vulnerability is the SSH (Secure Shell) service, which allows remote administration of servers. Despite using a non-default

Leer más »