DNS protection could prevent approximately one-third of the total losses due to cybercrime. The Global Cyber Alliance estimates how much DNS protection, such as a DNS firewall, could save the economy. In many cases, the DNS protection service or DNS firewall will be available at no cost to purchase or license. The only real difficulty, Reitinger says, comes if the firewall begins generating false-positives, blocking traffic to destinations that serve a legitimate business purpose. Ask serious questions of the provider before signing a contract or changing a resolution server address.”]