An anonymous reader writes "MIT announced that despite a long history of running an open network (so that any student can run a server on any port, without any questions asked), it will now end this policy due to recent denial-of-service attacks and gunman hoax. From a letter sent by Executive Vice President and Treasurer Israel Ruiz: 'I am deeply and personally committed to safeguarding our community, protecting our campus and securing our systems. Together with our colleagues dedicated to campus safety and security, with the support of senior academic leadership and in collaboration with the campus community, we are deploying all necessary resources to this effort. It will require the dedication of all of us to promote safety awareness, complete necessary emergency training, and adhere to reinforced cyber security guidelines. IS&T staff members are working with information technology (IT) leadership and partners across campus in making the changes described above. We continue to explore all opportunities to further strengthen our preparedness, and will communicate additional information as these plans evolve.'"