To Investigate

This page contains interesting tools that might be useful for future inclusion in the Network Security Toolkit.

Data Visualizer

Gephi is a generic visualizer that allows one to look at node/edge based graphs visually. Might be useful for visualized network traffic, intrusion detection data, etc.

http://gephi.org/

Web Cam Image Capturing

The v4l-utils package includes a lot of web cam utilities. Including the v4l2-ctl command line tool which allows you to query and adjust the web cam settings from the command line. Try:

 yum install v4l-utils
 v4l2-ctl --all
 v4l2-ctl --list-ctrls

Here are some examples which query and then change the frame size:

[root@cayenne image-capture]# v4l2-ctl --all
Driver Info (not using libv4l2):
	Driver name   : uvcvideo
	Card type     : USB 2.0 Camera
	Bus info      : usb-0000:00:1d.7-2
	Driver version: 3.6.11
	Capabilities  : 0x04000001
		Video Capture
		Streaming
Format Video Capture:
	Width/Height  : 640/480
	Pixel Format  : 'YUYV'
	Field         : None
	Bytes per Line: 1280
	Size Image    : 614400
	Colorspace    : SRGB
Crop Capability Video Capture:
	Bounds      : Left 0, Top 0, Width 640, Height 480
	Default     : Left 0, Top 0, Width 640, Height 480
	Pixel Aspect: 1/1
Video input : 0 (Camera 1: ok)
Streaming Parameters Video Capture:
	Capabilities     : timeperframe
	Frames per second: 30.000 (30/1)
	Read buffers     : 0
[root@cayenne image-capture]# v4l2-ctl --list-framesizes=YUYV
ioctl: VIDIOC_ENUM_FRAMESIZES
	Size: Discrete 640x480
	Size: Discrete 352x288
	Size: Discrete 320x240
	Size: Discrete 176x144
	Size: Discrete 160x120
	Size: Discrete 640x480
[root@cayenne image-capture]# v4l2-ctl --set-fmt-video=width=352,height=288,pixelformat=YUYV
[root@cayenne image-capture]# v4l2-ctl --get-fmt-videoFormat Video Capture:
	Width/Height  : 352/288
	Pixel Format  : 'YUYV'
	Field         : None
	Bytes per Line: 704
	Size Image    : 202752
	Colorspace    : SRGB
[root@cayenne image-capture]# 

The streamer tool from the xawtv package can be used to capture still frames at periodic intervals. For example, the following will capture 10 frames total at a capture rate of 0.2 seconds per frame (5 seconds between each image):

streamer -w 2.0 -t 10 -r 0.2 -s 640x480 -o /var/nst/image-capture/image-00.jpeg

NOTE: It's been hit and miss for me related to the use of the streamer rate parameter (often is seems like it is ignored and images are captured very quickly - especially at the initial start of the capture).