On-Net Surveillance Systems, Inc.
NetDVMS 6.5e
Logging
129
•
Image Server Service Audit Log Files
These files log NetGuard and NetGuard-EVS user activity, if audit logging is enabled in the
Image
Server Administrator
. A log file is created for each day with remote user activity.
Image Server
audit log files are by default placed in a subfolder named
ISAuditLog
under the folder
containing the NetDVMS software.
Image Server
audit log files are named according to the structure is_auditYYYMMDD.log, e.g.
is_audit20070615.log
.
•
Web Server Log Files
These files log activity on the Web Server, if logging is enabled in the NetDVMS HTTP Server
window.
Web Server
log files are by default placed in the folder containing the NetDVMS software.
Web Server
log files are named according to the structure www_YYYYMMDD.log, e.g.
www_20070615.log
.
•
Image Import Service Log Files
These files log activity regarding the
Image Import
service, which is used for fetching pre-alarm
images, and storing the fetched images in the database. Pre-alarm images is a feature available for
selected cameras only; it enables sending of images from immediately before an event took place
from the camera to the surveillance system via e-mail.
Image Import
Service log files are by default placed in the folder containing the NetDVMS software.
Image Import
Service log files are named according to the structure
ImageImportLog_YYYMMDD.log, e.g.
ImageImportLog20070615.log
.
•
Log File Structures
Most log files generated by NetDVMS use a shared structure complying with the W3C Extended Log File Format:
Each log file consists of a header and a number of log lines:
•
The
header
outlines the information contained in the log lines.
•
The
log lines
consist of two main parts: the log information itself and an encrypted part. The
encrypted part makes it possible—through decryption and comparison—to assert that a log file has
not been tampered with.
•
Integrity Checks and Possible Error Messages
Log files are subjected to an integrity check once every 24 hours. The result of the integrity check is
automatically written to a file named according to the structure LogCheck_YYYYMMDD.log, e.g.
LogCheck_20070615.log
.
The log check file is by default placed in the folder containing the NetDVMS software.
Any inconsistencies will be reported in the form of error messages written in the log check file. The following table lists
possible error messages (other, non-error, messages may also appear in the log check file):
