Wireless Connection Problems - How To Disable IPv6

UofL IT is noticing that some computers are erroneously advertising IPv6 services to others on the wireless networks. This can be caused by a computer having Internet Connection Sharing enabled. When this is the case, users affected by these advertisements are unable to get to some websites and network services. UofL IT is looking into ways to mitigate this problem on the network.


On this page:

As a short term solution, UofL IT recommends turning off IPv6 on your computer's wireless network card. This will allow you to continue to use the network uninterrupted.

Mac OS X 10.5 or 10.6

To disable IPv6 on your computer

  1. Choose Apple menu > System Preferences, and then click Network.
  2. If the Network Preference is locked, click on the lock icon and enter your Admin password to make further changes.
  3. Choose the network service you want to use with IPv6, such as Ethernet or AirPort.
  4. Click Advanced, and then click TCP/IP.
  5. Click on the Configure IPv6 pop-up menu (typically set to Automatically) and select Off.


Mac OS X 10.7, 10.8, 10.9

To disable IPv6 in OS X Lion, you will need to use the Terminal.

1.      Applications > Utilities > Terminal

  1. To determine what are all of your Mac's network interfaces are, issue the following command: networksetup -listallnetworkservices
  2. To disable IPv6 for wireless, issue the following command: networksetup -setv6off Wi-Fi; to disable IPv6 for Ethernet, issue the following command: networksetup -setv6off Ethernet
  3. To re-enable IPv6, use -setv6automatic instead


Windows 7

Tip: Microsoft has a "Fix-it" tool that will do this for you. Please see:http://support.microsoft.com/kb/929852


1.      Open the Network and Sharing Center.

You can do this by first clicking the Windows icon in the lower left hand corner, then typing "Network and Sharing Center" into the search box at the bottom and selecting it from the list.

2.      Click on Change Adapter Settings on the left hand side

3.      Right click on your wireless adapter and click Properties

4.      Uncheck Internet Protocol Version 6 (TCP/IPv6)