The NSA told West Point cadets to disable their firewalls for several hours at a time. The loss of the firewall exposed an unsecured administrative account on the Navy’s network, allowing the NSA to wreak havoc. The request came after a period of relatively little activity from the hackers, which led Midshipman Trevor Baumgartner to boast that the Navy group’s defense technologies had stymied the NSA hackers. A visiting NSA professor at the Naval Academy chuckled at the notion that the NSA team used the firewall exercise as a last resort.”]
Source: https://taosecurity.blogspot.com/2003/04/cadets-are-at-it-again-except-this.html