Change your DNS: Configuration for Ubuntu

1. Right-click on ‘Network Icon’ (located at top-right panel by default) and click on ‘Edit Connections’ to open Network Connections Manager.
2. Choose the type of connection you have. For this example, we will use ‘Wired’.
3. Under ‘Wired’, highlight ‘Auto etho’ and click on ‘Edit’.
4. Inside 'Editing Auto etho' window, click on ‘IPv4 Settings’ tab.
5. Under ‘IPv4 Settings’, change the ‘Method’ to Automatic (DHCP) addresses only.
6. Put these nameserver addresses as your ‘DNS Servers’: 208.67.222.222, 208.67.220.220
7. Click ‘OK’ and reboot your machine. You can then visit http://welcome.opendns.com to confirm you are using OpenDNS.
8. NOTE:

1. Right-click on ‘Network Icon’ (located at top-right panel by default) and click on ‘Edit Connections’ to open Network Connections Manager.

2. Choose the type of connection you have. For this example, we will use ‘Wired’.

3. Under ‘Wired’, highlight ‘Auto etho’ and click on ‘Edit’.

4. Inside 'Editing Auto etho' window, click on ‘IPv4 Settings’ tab.

5. Under ‘IPv4 Settings’, change the ‘Method’ to Automatic (DHCP) addresses only.

6. Put these nameserver addresses as your ‘DNS Servers’: 208.67.222.222, 208.67.220.220

7. Click ‘OK’ and reboot your machine. You can then visit http://welcome.opendns.com to confirm you are using OpenDNS.

8. NOTE:

To avoid having your settings get revoked after reboots, or after periods of inactivity you may need to make the following changes via the command line:

$ sudo cp /etc/resolv.conf /etc/resolv.conf.auto
$ gksudo gedit /etc/dhcp3/dhclient.conf
# append the following line to the document
prepend domain-name-servers 208.67.222.222,208.67.220.220;
# save and exit
$ sudo ifdown eth0 && sudo ifup eth0

You may be required to change eth0 to your own network device's name if it uses a non-standard name.

Instructions courtesy of www.junauza.com