In Estonia, firewall lessons are the new duck-and-cover drills

Readers of this blog are well aware of Estonia's cybersophistication. Unfortunately, its innovation in state-of-the-art online voting, tax filing, and money transfer has made the country a target for malicious cyberattacks. Exhibit A: the denial-of-service attacks of April and May 2007, which closed down critical Estonian government and business websites and froze the country's automated teller machine and mobile phone networks.

Vaino Reinart, Estonia's ambassador to Canada, Mexico, and the...