text: **Capturing failed logon attempts (AIX)**
  Example 11-4 on page 252 is an extract from a simple system logging exit that captures 
  *message code 31*(a failed logon attempt) and writes the user ID that was used and 
  information about the network address of this user to a file. In this case, the file name is a 
  combination of the system date and the string failedlogon.log. This system log exit writes 
  all of the failed logon attempts for each day to a file that can then be sorted and analyzed by 
  other utilities to alert for possible security risks. 