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About network attack, detection and prevention – part 001.

Because I met various people users and admins who have trouble understanding some network tools will briefly present a small tutorial about common network attacks.
Basic teory
DOS attacks – is usually used to send a lot of traffic to the victim machine to consume its resources so that the legit users are not able to access the services.
Ping flood – this atack will send you a huge amount of Ping packets with packet size as big as possible. In windows you can specify the data/buffer size too.
MAC flooding – with this attack the attacker will transmit a lot of ARP packets to fill up the switch’s CAM table and this which means that the switch will broadcast the incoming packet to all the ports.
ARP spoofing – in this case you shall associate your MAC address to victim’s IP address by sending a specially crafted ARP frame.
Tools for simulating the attacks
Any software for networking with sniffing and detect can be detected by servers.
– Hackers used using Kali – debian distro linux (it contains a lot of tools).
– Ping flooding tool: Nping
– MAC flooding tool: Macof
– ARP spoofing tool: dSniff
Detection and prevention
Any network attacks or simulate attacks can be detected by hardware and software.
You can used also the Wireshark to detect the attacks.

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Mandelbrot with three.js .

The Mandelbrot set is the set of complex numbers c for which the function f c ( z ) = z 2 + c {\displaystyle f_{c}(z)=z^{2}+c} {\displaystyle f_{c}(z)=z^{2}+c} does not diverge when iterated from z = 0 {\displaystyle z=0} z=0, i.e., for which the sequence f c ( 0 ) {\displaystyle f_{c}(0)} {\displaystyle f_{c}(0)}, f c ( f c ( 0 ) ) {\displaystyle f_{c}(f_{c}(0))} {\displaystyle f_{c}(f_{c}(0))}, etc., remains bounded in absolute value.wikipedia.org

You need to download the three.js – java script from threejs webpage.
The source code is simple. Come with default HTML5 page and javascripts.
One part of this will make vertex-shader and fragment shader, both is 2D shader type.
You need the canvas tag with id=”canv”.
The last part of source code is make to put all into one image processing by shaders.

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Fix error: Install and uninstall windows LibreOffice.

When you try to install or uninstall LibreOffice software then this will want the old instalation file.
For example I want to install the new LibreOffice 5.1.52 software and the instalation file try to find the old LibreOffice_5.1.4_Win_x64.msi.
I fix this with download the LibreOfice_5.1.4.2_Win_x64.msi from here and renamed with LibreOffice_5.1.4_Win_x64.msi.
Also you need to use task manager to close all firefox browser tasks.
This will allow to install the new version of LibreOffice software.

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CGTune – settings on the fly to CGMiner.

This website come with one program how make changes to the CGMiner settings on the fly without shutting down and restarting the application. Just put on CGMiner folder then add  the following command line parameters to CGMiner .bat file  –api-listen –api-allow W:127.0.0.1.
To make settings just open one terminal and use the next commands.
Caution: Some settings permanently affect the operation of the video card.  CGTune requires that all commands parameters use two dashes.

Command Line Parameters

–version
–config
–summary
–pools
–devs
–gpu [a]
–pga [a]
–cpu [a]
–gpucount
–pgacount
–cpucount
–switchpool [a]
–enablepool [a]
–disablepool [a]
–gpu-enable [a]
–gpu-disable [a]
–gpu-restart [a]
–gpu-intensity [a,b]
–gpu-memclock [a,b]
–gpu-engine [a,b]
–gpu-fan [a,b]
–gpu-vddc [a,b]
–quit
–notify
–pgaenable [a]
–pgadisable [a]
–pgaidentify [a]
–devdetails
–restart
–stats
–coin
Display CGMiner and API version information
Display CGMiner configuration settings
Display CGMiner miner summary
Display status of each pool
Display GPU, PGA and CPU with their details
Display GPU [a] information, where a = 0, 1, etc.
Display PGA [a] information, where a = 0, 1, etc.
Display CPU [a] information, where a = 0, 1, etc.
Count number of GPUs
Count number of PGAs
Count number of CPUs
Switches to pool [a]
Enables pool [a]
Disables pool [a]
Enables GPU [a]
Disables GPU [a]
Sends a restart request to GPU [a]
Sets the intensity on GPU [a] at [b] intensity
Sets the memory clock on GPU [a] at [b] MHz
Sets the GPU engine on GPU [a] at [b] MHz
Sets the GPU fan speed on GPU [a] at [b] percentage
Sets the GPU voltage on GPU [a] at [b] volts
Tells CGMiner to shut down
Display last status / history count of each problem
Enables PGA [a]
Disables PGA [a]
Flashes PGA [a] (if supported)
Display device with a list of their static details
Restart CGMiner
Display device and pool statistics
Display coin mining information

 

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WebRTC – First steps – part 001.

The official website told us:
WebRTC is a free, open project that provides browsers and mobile applications with Real-Time Communications (RTC) capabilities via simple APIs. The WebRTC components have been optimized to best serve this purpose.
First I will come with one simple example into this tutorial.
Will make one webcam into webpage.
Make one index.html file and add this source code:
(more…)

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