Windows 11

• Open Windows Settings (by pressing Windows key + I).

• In the left-hand menu, select Network & internet.

• Depending on your connection, click on Wi-Fi or Ethernet.

• Look for the Hardware properties option (usually at the bottom or directly under your network name).

• Locate the DNS server assignment section and click the Edit button.

• Change the dropdown menu from "Manual" to Automatic (DHCP).

• Click Save.

macOS

• Click the Apple menu in the top-left corner and select System Settings.

• In the sidebar, click on Network.

• Click on the type of connection you are using (usually Wi-Fi or Ethernet).

• Once inside your network settings, click the Details... button (usually on the right, next to the connected network).

• In the left column of the popup window, select the DNS tab.

• Clear manual entries: If you see any IP addresses in the "DNS Servers" list, select them one by one and click the minus (-) button below.

• Verification: Once you have removed all manual addresses, you will see addresses appearing in light gray (faded). This indicates that macOS is now pulling automatic addresses from your router.

• Click OK and then Apply if necessary.

Android

1. Set Wi-Fi to DHCP (Automatic)

This ensures your phone uses the DNS provided by the router you are connected to.

1. Open the phone Settings.

2. Go to Connections or Network & internet.

3. Tap on Wi-Fi and then on the gear icon or the "i" next to your connected network.

4. Look for IP settings (it might be under "Advanced" or "View more").

5. Ensure DHCP is selected (this is the automatic mode).

6. If it is set to "Static", change it to DHCP. This will wipe any manual DNS previously entered for this specific network.

2. Private DNS (Crucial)

From Android 9 onwards, the Private DNS setting can override router settings. To set it to automatic:

1. In Settings, search for More connection settings, Network & internet, or use the search bar and type Private DNS.

2. Select the Automatic option.

   • Off: Uses the network provider's DNS (what we want).

   • Automatic: Android will attempt to use encrypted DNS if the provider supports it.

   • Private DNS provider hostname: Make sure this option is NOT selected if you want pure automatic DNS.

Linux (Ubuntu)

Method 1: Graphical Interface (GNOME)

1. Open the system Settings.

2. Go to the Network (or Wi-Fi) tab in the left sidebar.

3. Click the gear icon next to your connected network.

4. In the popup window, select the IPv4 tab.

5. Ensure "IPv4 Method" is set to Automatic (DHCP).

6. Find the DNS section and toggle the switch to Automatic.

   • Note: If there were manual addresses written in the box, delete them so it is empty before enabling automatic mode.

7. Do the same in the IPv6 tab if it is enabled.

8. Click Apply.

9. Turn the network switch off and back on for the changes to take effect immediately.

Method 2: Command Line (Netplan)

1. Locate the configuration file: ls /etc/netplan/

2. Edit the file: sudo nano /etc/netplan/filename.yaml

3. Ensure the interface has dhcp4: true and that there are no nameservers lines:

network:
  version: 2
  renderer: networkd
  ethernets:
    enp3s0:
      dhcp4: true

4. Apply the changes: sudo netplan apply