This tab is used for saving captured packets to a file on the disk.
CommView saves packets in its own format with the .NCFX extension.
You can open and view these files at any time
using Log Viewer,
or you can simply double-click on any NCFX file to have it loaded
and decoded. NCFX is an open format; please refer
to CommView Log Files Format chapter
for detailed NCFX format description.
Save and Manage
Use this frame to save the captured packets manually to a file and
to concatenate/split capture files. It is possible either to save
all packets currently stored in the buffer or save only a part of
them within a given range. The To and From fields
allow you to set the necessary range based on the packet numbers as
shown on the Packets tab. Click Save
As … to
select a file name. To concatenate manually multiple NCFX files
into a single, larger file, click on the Concatenate
To split NCFX files that are too large into smaller chunks, click
on the Split
Then the program will guide you through the process, and you will
be able to enter the desired size of the output files.
Check this box to have the program automatically save captured
packets as they arrive. Use the
Maximum directory size
field to limit the total size of the capture files stored in
If the total size of the capture files exceeds the limit, the
program automatically deletes the oldest files in the directory.
Average Log File Size
field allows you to specify the approximate desired size of each
log file. When the log file reaches the specified size, a new file
is automatically created. To change the default
click on the
Save files to
box and select a different folder.
If you want to have an important capture file stored for a long
time, do not keep it in the default Log Directory: there is a
chance it will be automatically deleted as new files are being
saved. Move the file to a different folder to preserve it.
Please note that the program does not save each packet individually
immediately upon arrival. It means that if you view the log file in
real time, it may not contain the latest packets. To make the
program immediately dump the buffer to the log file, either
or uncheck the
WWW Access Logging
Check this box to enable logging of HTTP sessions. Use
file size field
to limit the size of the log file. If the log file size exceeds the
limit, the program automatically deletes the oldest records in the
file. To change the default file name and path, click on
files to box
and select a different file name. Log files can be generated
in HTML or TXT formats.
Click Configure to
change the default logging options. You can change the port number
that is used for HTTP access (the default value of 80 might not
work for you if you are behind a proxy server), and exclude certain
data types (usually logging anything other than HTML pages is quite
useless; therefore it is a good idea to exclude URLs of pictures
from the log file).