CEH: Gathering Network And Host Information, Types Of Scan

In Hacking the main focus is over gathering the information about victim or victim's machine. Which will help to find out which type of exploit will works according to the given circumstances. Gathering the network and host information means to find out by which network, the which victim's machine is connected and communicating over the network. Moreover, scanning is also performed for gathering information about open and closed ports. After that they'll able to find the vulnerabilities in the target system and try to get access to the system.

Types Of Scan

As a CEH you should know the scan types and uses:

SYN

SYN scan doesn't complete the TCP three way handshake that is why it is known as a half-open scan. An attacker send a SYN packet to the victim machine if SYN/ACK packet is received back to attacker, then it clarify that the port is listening due to the acknowledgment by the victim that it has completed the connection. While if the attacker is received the RST/ACK packet then it assumed that the port is closed or open.

XMAS

XMAS scan works only on target system that has the RFC 793 development of TCP/IP and it doesn't works against any version of windows.
XMAS scan send a packet with by setting up the FIN, URG and PSH flags of the TCP header. The function of this scan is if the port is active there will be no response but if the port is closed the target responds with a RST/ACK packet.

FIN

A FIN scan send a packet by setting up only the FIN flag of the TCP. This scan is similar to XMAS scan. FIN scan receives no response if the port is active while if the port is closed it receives the RST/ACK packet.

NULL 

NULL scan is also similar to the XMAS scan. But the only difference is that it sends a packet without setting up the any flag of TCP header. NULL scan receives no response if the port is open but if the port is closed it receives the RST/ACK packet.

IDLE

It is just like spoofing an IP address by sending a SYN packet to the victim's machine to find out which services are available over the system. This scan is completed with the help of another system called as "Zombie" (that is not receiving or transmitting any information).

Continue reading

1. Pentest Tools Alternative
2. Pentest Tools Bluekeep
3. Hack Tools For Windows
4. Pentest Tools Open Source
5. New Hack Tools
6. Pentest Tools List
7. Pentest Tools Apk
8. Hacker Tools Linux
9. Github Hacking Tools
10. World No 1 Hacker Software
11. Hacker Tools Linux
12. Growth Hacker Tools
13. Github Hacking Tools
14. Hacking Tools Windows
15. Hack Apps
16. Ethical Hacker Tools
17. Pentest Tools Online
18. Hacker Security Tools
19. Tools Used For Hacking
20. Beginner Hacker Tools
21. New Hack Tools
22. Hacking Tools And Software
23. What Is Hacking Tools
24. Pentest Tools Nmap
25. Wifi Hacker Tools For Windows
26. Pentest Tools For Windows
27. Pentest Tools For Windows
28. Hacker Tools For Pc
29. New Hack Tools
30. Pentest Tools For Ubuntu
31. Hack Tools 2019
32. Hacker Tools
33. Pentest Automation Tools
34. Hacker Security Tools
35. Pentest Tools List
36. World No 1 Hacker Software
37. Hacks And Tools
38. Hacker Tools List
39. Tools 4 Hack
40. Nsa Hack Tools Download
41. Hacker Security Tools
42. Game Hacking
43. How To Make Hacking Tools
44. New Hacker Tools
45. Pentest Tools Subdomain
46. Hacking Tools Name
47. Hacking Tools 2020
48. Pentest Tools Find Subdomains
49. Github Hacking Tools
50. Github Hacking Tools
51. Hacking Tools And Software
52. Hacking Tools For Mac
53. Tools 4 Hack
54. Hacking Tools Online
55. Hack Tools For Pc