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Q. My
HTTP plugin does not always display HTML pages correctly. For
instance, some images are not displayed. Why is this so?
A. A
typical HTML page represents a collection of a dozen of independent
objects: HTML code, images, CSS styles, and others. A browser
requests each of these objects; however, most of these objects are
cached (saved to the computer’s hard drive for future access) and
hence not requested from the network every time a Web page is
viewed. NetResident does not have access to your browser’s cache;
therefore, it cannot “see” these objects. This is not a problem
with NetResident; you can always reload the Web page in your
browser (you need to perform a complete reload; in Internet
Explorer, this is achieved by clicking on the Refresh
button while holding down the Shift
key). This will allow NetResident to log and store all Web page
elements.
Q. When
I try to import CommView or CommView for WiFi log files, I am
unable to display the contents of some of the files. I believe I
have all parameters set correctly regarding the event viewer and
filtering.
A. It
is important to understand that the import procedure has its own
filter, and the content displaying mechanism has its own filter.
When you were importing the file, the content was possibly filtered
out during the import phase if you applied filters. Once the import
phase is over, the application uses the display filter to show the
contents. There is a chance that the application is configured to
show only the data collected during the last two days, while the
logs contained sessions that were outside this time frame. You may
want to disable the display filter to have the application show the
data.
Q. Why
does the NetResident service insist on starting if I just want to
review LOG files and not capture current data?
A. The
database is maintained by the service. The GUI is simply a console
that “talks” to the service. All data processing and filtering is
performed by the service as well, so it has to be running.
Q. Can
you give some performance metrics when NetResident is being used to
monitor a heavily loaded network?
A. The
program’s performance depends on the CPU speed and RAM size. If you
use the default monitoring settings (i.e., when all the plug-ins
are enabled and all the ports are being monitored, an average
Pentium4 3 GHz PC with 512 Mbytes of RAM can monitor a fully used
100 Mbit link. To monitor faster network links, you should set up
filtering by station, limit the ports being monitored, and disable
unnecessary plugins. The performance also depends on the type of
traffic being monitored, so additional filters should be applied
only if you experience performance problems.
Q. For
some ICQ and AIM chat sessions, one of the parties’ ID number is
shown as “Not detected.” Why is it not detected?
A.
This happens when an ICQ or AIM chat session (including the
authentication phase) begins before NetResident starts capturing
network packets. If capturing is started in the middle of a chat
session, the ID can sometimes be found (as it is contained in some
service packets, which are sent intermittently), although this
cannot be guaranteed.
Q. Can
your VoIP module be used for logging Skype conversations?
A. No,
sorry. Skype uses robust encryption; it is impossible to decrypt
Skype conversations.
Q. Why
does NetResident not show the amount of transferred data in terms
of bytes?
A.
NetResident does not always store transferred data in their
original form. Rather, it processes data for more convenient
presentation. It is not uncommon for a single network session to be
divided into several separate events, or several network sessions
to be combined into one event. Besides, some transferred data
simply are not supposed to be processed by current NetResident
plugins. That said, NetResident cannot and is not supposed to
display reliable network data statistics.
Q. I use
NetResident 2.x. Can I import my existing database into NetResident
3.0?
A.
Unfortunately, no. NetResident 3.0 is a completely new product that
uses a new database structure, so importing is not possible.
Q. I use
NetResident 2.x. Can I install NetResident 3.0 on the same
computer?
A.
Yes, these applications can work side by side.
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