The Ultimate Guide to Prevent DNS leaking

Go to the "Control Panel > Network and Internet > Network and Sharing Center" and click on "Change adapter settings". Or you can type "ncpa.cpl" in Run (Start > Run) and enter
Right click your main Internet connection, and select "Properties".
Select "Internet Protocol Version 4 (TCP/IPv4)" and click "Properties".
In DNS area, add Google DNS "8.8.8.8" and "8.8.4.4" or OpenDNS "208.67.222.222" and "208.67.220.220".

Open "Command Prompt": Click on start menu and in the search box type "cmd". In the search result, right-click on "cmd" and select "Run as administrator"
In opened window (cmd) type
```
netsh interface teredo set state disabled
```
and press enter.
Restart your computer.
If you want to re-enable Teredo in the future, open Command Prompt and type netsh interface teredo set state type=default

Open "Command Prompt": Click on start menu and in the search box type "cmd". In the search result, right-click on "cmd" and select "Run as administrator"
To see your connected network, in opened window (cmd) type
```
netsh interface show interface
```
and press enter. In this example the connected netword is "ADSL"
Connecto to your VPN now.
In opened window (cmd) type
```
ipconfig /flushdns
```
and press enter.
In opened window (cmd) type
```
netsh interface ipv4 delete dnsservers "ADSL" all
```
and press enter. This will remove the DNS settings from your network interface.
Note: Replace "ADSL" with the name of your connected interface.
After disconnecting from your VPN you can renew your previous DNS settings. Type:
```
netsh interface IPv4 set dnsserver "ADSL" dhcp
```
and press enter.
In the last part, type: ipconfig /flushdns and press enter.

Go to the "Settings" and then "More connection settings":
Go to the "VPN":
Tap and hold your VPN connection's setting icon, then select "Edit profile":
Check "Show advanced options" and more available options will be appear:
Set one of the follwoing DNS servers in the "DNS servers (e.g. 8.8.8.8)":
- Google DNS: "8.8.8.8 8.8.4.4"
- OpenDNS: "208.67.220.220 208.67.222.222"
You can also use combination of Google and OpenDNS if you like: "8.8.8.8 208.67.220.220"
IMPORTANT: between 2 DNSs space are 100% required.

Go to the "Settings" and navigate to the "WiFi":
Select your WiFi and tap the blue "i":
Change the DNS settings to Googles or OpenDNS servers by tapping the line "DNS":
- Google: "8.8.8.8, 8.8.4.4"
- OpenDNS: "208.67.220.220, 208.67.222.222"
You can also use combination of Google and OpenDNS if you like: "8.8.8.8, 208.67.220.220"
IMPORTANT: between 2 DNSs comma and space are 100% required.

Go to the "System Preference...":
Go to the "Network":
Select your Internet connected, WiFi or Ethernet (LAN) then click on "Advanced...":
Go to the "DNS" tab, click the "+" button:
In DNS area, add Google DNS "8.8.8.8" and "8.8.4.4" or OpenDNS "208.67.222.222" and "208.67.220.220", at the end, click "OK".

Go to the "Network Connections":
In new window select your Internet connected, WiFi or Ethernet (LAN) then, click on "Edit" button:
Go to the "IPv4 Settings" tab, and change the Method to "Automatic (DHCP) addresses only":
In DNS area, add Google DNS "8.8.8.8, 8.8.4.4" or OpenDNS "208.67.222.222, 208.67.220.220", at the end, click "Save".
IMPORTANT: between 2 DNSs comma and space are 100% required.

Close the current opened window to confirm the changes you've made and click the "Close".
Some times you need to enable/disable "Networking"option to apply your changes.

VPN DNS Leak