The default output format reports the following information:
An optional format (used if a '-c' option was specified) reports the following information:
If the '-c all' option is used, this style of report will include the full addresses (the hostname, if available, or else the numeric IP).
If the '-c 1', '-c 2', or '-c 3' option is used, then only the last one, two, or three final segments of the hostnames (if available) are displayed. For example, the last segment of the hostname is the top level domain name -- like 'COM' or 'EDU'. If the '-c 1' option is specified, a summary of usage by those top level domains will be generated. (With these options, the numeric IP addresses are not displayed separately; rather, they are combined together and reported as a group.)
Note that the ability to display all or part of a hostname assumes that Tomcat has been configured (when SDA was installed) to resolve IP addresses (usually possible only for a subset of client addresses). See the SDA Installation Guide for more information on configuring Tomcat to show hostnames in the SDA log file.