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DevilsSaviour

General Topics Cyber Security

DevilsSaviour
Jan 9th, 2017
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  1. Ports : Ports are the doors to your computer and any device connected to a network from where data comes in and goes out from the device.
  2.  
  3. Classification of the Status of Ports
  4. --------------------------------------
  5. 1. Open
  6. 2. Closed
  7. 3. Filtered (Protected by Firewall)
  8.  
  9. Types of Ports
  10. -----------------
  11. 1. Physical Ports : Ports which are tangible in nature i.e which we can see and touch.
  12.  
  13. Example : USB Ports, VGA, HDMI port etc etc etc...
  14.  
  15. 2. Virtual Ports: These are the virtual intangible ports from where data flows in and out from the device.
  16.  
  17. For Example :65,000 approx.
  18.  
  19. Predefined Ports : In Virtual ports we have many port numbers which are reserved for a range of protocols which cannot be changed.
  20.  
  21. For Example : HTTP: 80,8080 , FTP : 21
  22.  
  23. Userdefined Ports : These are the ports which are defined by the users mostly within the network according to the requirement policy of the respective organisation.
  24.  
  25. For Example: VOIP : Random available port
  26. DNS : Domin Name Server: In nutshell its a translater between virtual address and physical address.
  27.  
  28.  
  29. www.google.com ------> 170.26.22.34
  30.  
  31.  
  32.  
  33. Home Work : TCP-IP Model
  34.  
  35. Proxy Servers: These are the dummy servers which can give any client a fake ip address i.e fake identity on the web. Hence user can protect his.her privacy by not disclosing the real ip.
  36.  
  37. People also use the Proxy server to bypass the restriction s takes place in the respective org or college etc.
  38.  
  39. Network--->Firewall---> Open Internet
  40. 122.98.22.23 ----> Its a part of my family ->wl/bl
  41. 65.27.23.22----> its X -> rules ??????
  42.  
  43.  
  44. Types of Proxy Servers
  45. ----------------------
  46.  
  47. 1. Web Based Proxy Servers : In this type of proxy servers , we user web portals to change our online identity .
  48.  
  49. For Example : www.kproxy.com , www.anonymizer.ru, www.ninjaproxy.com , www.freeproxyserver.ca
  50.  
  51. 2. Standalone Proxy Servers : In this type o proxy servers we use application softwares that connects us to the proxy servers and can change our online identity for the same.
  52.  
  53. 1. UltraSurf
  54. 2. Hotspot Security Shield
  55.  
  56. 3. VPN: Virtual Private Network : These are just like proxy servers as they will help you to change the IP address but along with changing the IP address they also provide a very strong tunnel encryption to the data hence no one can intercept the communication of yours.
  57.  
  58. The level of encryption depends upon the VPN company.
  59. 1. Free Gate
  60. 2. ProXPN
  61. 3. CYberGhost
  62.  
  63. Home2 : Top 10 Free VPN with downloading link.
  64.  
  65. 4. Addon Proxy Server : When we use a standard addon of mozilla to change our IP address we call it as plugin based proxy server.
  66.  
  67. Chain Proxy : Ultra--> kproxy.com-->freeproxyserver.ca--> anonymizer.ru -> www.fbi.com
  68.  
  69.  
  70. Web Technology Basics
  71. ---------------------
  72. 1. Domain Registration
  73. 2. Server Setup
  74. 3. Web Servers : Win Linux
  75. 4. Shared and Dedicated Servers
  76. 5. Database for Dynamic Websites
  77.  
  78.  
  79. Notes by Akash Agrawal (@Devils Saviour)
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