• The 10 dumbest mistakes network managers make - Network World - Tippett says the easiest way to prevent these errors is to run an application firewall in "learn" mode so that it can watch how users enter data into a field and then put the application firewall in "operate" mode so that SQL commands can't be injected into a field. The SQL coding problem is widespread. "If a company tests 100 servers, they will probably find a SQL injection problem on 90 of them," Tippett says.