LPU cyber Security

copy /b image+text optput_extension
/b binding two files


idn homograph attack-->changing the characters with other language characters, which looks same but have different meaning..... е

english--->www.facebook.com
IDN homo--->www.facеbook.com



TCP/IP connection... using swiss knife....
netcat

network---> connection of twoo or more heterogeneous devices, which are used to exchange information, having periferaal ports.....

ip addresses...virtual address given to you machine. it is not unique on internet but yes it is unique in the LAN.

Local ip---> ip provided to us in the LAN.... ipconfig
public/global ip----> it is the IP of the lan used during surfing the web... ip of ISP.... whatismyip
ipcow
ipchicken

tracing UP addresss.... reverse ip mapping

http://www.fuglekos.com/


classes of ip
class A 0-127    gneral
class B 128-191 purpose
class C 192- 223 usage
class D 224-239
class E 240-255

ip4
IP6
where is ip5?
dhcp 250... responsible for providing the ip address to your devices
NIC network Interface Card
MAC--- media access controll address
mac is a unique name or address provided to your device. its is like the physical aadress of your machine.




250 ip addresses....
110




ports---- area at which any servce is running on your device...
http 80
ftp 21
65,500+
leap port 1337

for checking the ports
cmd>netstat


DNS is a service which converts IP into domain name and domain name in to ip address
what is OSI models and ITS layers?


proxy server--- its a stand alone machine or software which is used to hide or spoof you ip address
web based proxy---hidemyass.com
stand alone software--- ultrasurf, hotspot
extesionbased--- annonymox



vpn---virtual private network\--- it provide an extra layer of encryption while surfing the web...




 mail---- hello how are you?
 send.... khdakhelljhzfbvo hokjhvjw sdjvharejsd you?
 psiphon is working on port 5555

 netstat -nab

 malware = malicious + softwares
 it is a code snipet, program, or a software which can be used to get accss to host device or cause serious harm to the taret
 worms
 trojans
 virus- it is a standalone software or a code snippet which need human interaction to harm the device. it is designed for harming system32

 @echo off---> processor, please make less noise while executing
 mkdir-->make directory


 darkcomet


 rat Remote administrative tool
 msrpc-- MS remote procedure call


 bios- basic input output system32
 it is the first thing that rung when you power on your machine

 worms--->worms are code snipeet write for a specific target, it does not need any human interaction at all. it only harms targetted computer or machine.
 keyogger----> software that captures keystroke of the targetted computer and send them to the hosting machine.



 keyloggers
 spyware
 adwares


 for hiding your drives
 cmd>diskpart
 diskpart> list volume
 >select volume <1-9>
 >remove letter <A-Z>---- invisible
 for reassigning---
 select volume <1-9>
 assign letter <a-z>



 start > gpedit.msc....
 user configuration
 system
 removable storage access

 social engineering---> manupilating someone to give his/her personal information to the intruder by any means.
 google hacking data bas
 google dorks...
 index of/-- gives result of the particular index


 site:www.xyz.com
--->it will give the result of every link having xyz.com in their link

filetype:pdf

inurl:-->it gives the link of searched keywords present in the url

intitle:-->to check the meta data for the title