What are the common techniques used for network scanning in ethical hacking?

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Aryan Kumar · Answer

There are many different techniques used for network scanning in ethical hacking. Some of the most common techniques include:

Ping scanning: Ping scanning is a simple technique that sends ICMP echo requests to a range of IP addresses to see if they are responding. This can be used to identify active hosts on a network.
TCP scanning: TCP scanning is a more sophisticated technique that sends TCP SYN packets to a range of ports on a target host. If the target host responds with a SYN-ACK packet, then the port is considered to be open. This can be used to identify services that are running on a target host.
UDP scanning: UDP scanning is similar to TCP scanning, but it uses UDP packets instead of TCP packets. UDP is a connectionless protocol, so there is no guarantee that the target host will respond to a UDP scan. However, UDP scanning can be used to identify services that are running on a target host that do not use TCP.
Stealth scanning: Stealth scanning is a technique that is designed to avoid detection by firewalls and intrusion detection systems (IDS). Stealth scanners typically send packets that are designed to look like legitimate traffic. This can make it difficult for firewalls and IDS to detect and block stealth scans.
Port knocking: Port knocking is a technique that allows authorized users to access a service that is running on a closed port. To use port knocking, the user sends a sequence of predetermined packets to a target host. If the target host receives the correct sequence of packets, it will open the port and allow the user to connect.

These are just a few of the many different techniques that can be used for network scanning in ethical hacking. The specific technique that is used will depend on the specific situation and the goals of the ethical hacker.

Here are some of the benefits of using network scanning in ethical hacking:

Identifying potential security vulnerabilities: Network scanning can be used to identify potential security vulnerabilities on a network. This information can then be used to fix the vulnerabilities and improve the security of the network.
Providing information about the network: Network scanning can provide information about the network, such as the IP addresses of active hosts, the services that are running on those hosts, and the types of firewalls and IDS that are in use. This information can be used to plan and execute security assessments and penetration tests.
Detecting unauthorized access: Network scanning can be used to detect unauthorized access to a network. This can be done by monitoring the network for unauthorized changes, such as new IP addresses or new services.

Overall, network scanning is a valuable tool that can be used to improve the security of a network. By understanding the different techniques that can be used for network scanning and the benefits of using network scanning, ethical hackers can help to keep networks safe from attack.

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