To view changes made to the ProxySG configuration over the past 30 days, Snapshots can be reviewed from the unit. The "/sysinfo" snapshots file on the ProxySG contains the configuration state for each day over the previous 30 days (by default). Since it only holds a history of 30 days, all data prior to 30 days is overwritten each day.
To review the snapshot "/sysinfo" files, go to Management Console > Maintenance tab > Service Information > Snapshots:
Currently (as of the date of this article), there is no tool available from Blue Coat to automate the process of viewing the configuration changes as described above.
Note: Apart from the Software Configuration, statistics such as HTTP, TCP/IP, WCCP, et c. can also be tracked from the snapshot "/sysinfo" file.