Last September the never-profitable company announced it was shutting down and firing its employees after running out of money. The future was once dazzling for IronNet.Founded by a former director of the National Security Agency and stacked with elite members of the U.S. intelligence establishment, IronNet promised it was going to revolutionize the way governments and corporations combat cyberattacks.Its pitch—combining the prowess of ex-government hackers with cutting-edge software—was initially a hit.