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Can the Internet Be Shutdown at SLAC?

The Oak Ridge National Laboratory has restored Internet access after shutting it down two weeks ago.  ORNL was forced to shut down its email systems and all Internet access for employees on Friday, April 15, 2011, following a cyber attack.


Can it happen at SLAC? Yes.  All it takes is one person to allow their system to be compromised.  How?  Opening email from unknown or unfamiliar source; having an unpatched system; not having the latest virus definitions; browsing unsafely, etc…


We know we can’t prevent it, but we can try.

We expect a flood of malware associated with the latest big news story.  Malware imbedded in photos seems particularly popular right now so beware of images not coming directly from a reputable source. Review email carefully and use caution when visiting websites.

You don’t want to be the cause of SLAC going off the Internet.

To read the ORNL story see:

What about the security of your home network? Read Best Practices for Keeping Your Home Network Secure from the National Security Agency (NSA). (See

If you have any questions, please contact your support person or computer security:

Owner: SLAC Computer Security
Page Created: 05/02/2011
Last Updated: 05/03/2011
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