Resetting Network Settings


For Windows devices, the Winsock reset command restarts the communication required between your device and the network. The int ip reset command rewrites the rules, resetting it to factory default, that are followed by devices to connect to the internet.

For Apple devices, removing the preference lists (plist) resets the network settings. Removal of the certificate and the password ensures that the device does not automatically fill in the wrong information when reconnecting to the network. 

Critical Concepts

Steps to Take


  1. On the taskbar search, type "Command Prompt."
  2. Right click on Command Prompt and press "run as administrator."
  3. When asked whether to allow Command Prompt to make changes to your computer, select Yes.
  4. Open Command Prompt
  5. Type the command netsh winsock reset then press enter

    Screenshot: Windows command prompt with netsh winsock reset command

  6. Type the command netsh int ip reset then press enter

    Screenshot: Windows command prompt with netsh int ip reset command

  7. Restart the computer


  1. Open System Preferences > Network

  2. In the list on the left, click Wi-Fi. Click the button Advanced in the lower right corner.

  3. On the Wi-Fi tab, under "Preferred Networks," delete all available networks by clicking on each option then the "-" button in the middle left. Click Ok.

  4. Click on the "802.1X" option

    1. If "User Profiles" shows up on the left bar, click the arrow next to "User Profiles", and delete everything listed there
    2. "User Profiles" is not always there. If it's not there, don't worry about it.

  5. Click on the "Proxies" option, and make sure none of the proxies are checked

  6. Click "Ok"

  7. Open Keychain Access. You can do this by pressing the Command key + Space Bar at the same time to open your Spotlight Search. Or click the magnifying glass in the top right hand corner. Then type “keychain access.”

  8. Find UCSD-Protected and delete them by right clicking then clicking delete. 

  9. Open your Finder application > click on Finder in the top left hand corner > select “Preferences.” 

    1. Click on the Sidebar tab and make sure the box next to "Hard Disks" has a check mark (not a line).

  10. Go back to your Finder window. 

    1. Under Locations on the left sidebar, click on Macintosh HD > Library

    2. Scroll down and click on Preferences

    3. Scroll down and click on System Configuration

    4. Right click then delete NetworkInterfaces.plist, preferences.plist

    5. Open your Trashcan and empty it.

  11. Restart computer. 

  12. Once your computer turns back on, click on the Wireless icon on the top right hand side. Choose UCSD Protected or Encrypted network

  13. When you are asked to verify certificate, click "continue"

If you still have questions or need additional assistance, please submit a ticket or call the ITS Service Desk at (858) 246-4357