Port Scanning Attack - GeeksforGeeks (2024)

Port Scanning Techniques By Using Nmap

Nmap is a security auditing tool used in the security field to actively enumerate a target system/network. It is one of the most extensively used tools by network administrators and conversely attackers for reconnaissance (enumeration), the first step in the 5 phases of hacking. Nmap is used to actively probe the target network for active hosts(hos

What is SYN Scanning?

Internet and its usage have evolved over the years. The Internet has become an integral part of daily human activities, and it becomes hard to imagine life without the Internet. The Cyber world has become so fascinating that it is often the soft target of cyberattackers and hackers to steal personal confidential information via the internet as a me

What are Scanning Attacks?

Scanning in ethical hacking is a network exploration technique used to identify the systems connected to an organization's network. It provides information about the accessible systems, services, and resources on a target system. Some may refer to this type of scan as an active scan because it can potentially disrupt services on those hosts that ar

What is TCP-ACK Scanning?

TCP-ACK is a third step of the TCP 3-Way Handshake process (SYN, SYN-ACK, ACK). In TCP-ACK, the client acknowledges the response of the Server, and establish a connection to proceed with the data transfer and any other communication processes. TCP-ACK Scanning: In this scan, the ACK packets are sent to the target port in order to know that if that

What is UDP Scanning?

UDP scanning is a process in which we scan for the UDP services that are being deployed on the target system or are currently in a running state. UDP is a connectionless protocol, hence it is hard to probe as compared to TCP. Working of UDP scan:In UDP scan usually, we take advantage of any UDP service clients like dig or tools like Nmap to send UD

IPv6 Scanning

Pre-requisites: IPv6 IPv6 Scanning is a term coined for Scanning of IPv6 Networks, IPv6 addresses have larger space addresses hence it is slow to scan IPv6 addresses as compared to IPv4 addresses, but it is not that hard to scan as we have many tools that can help in this process of scanning. We can scan for IPv6 Networks by different tools availab

Port Scan in Ethical Hacking

Port Scanning is the name of the technique used to identify available ports and services on hosts on a network. Security engineers sometimes use it to scan computers for vulnerabilities, and hackers also use it to target victims. It can be used to send connection requests to target computers and then track ports. Network scanners do not actually ha

How to Prevent Port Scan Attacks?

Cyber attacks are rising with the ever-growing internet use. The Internet has become essentially the modern times. The understanding of the Internet and the use of the internet is thus very essential. Security of Cyber Technology is really important and a necessity in today's time. Cyber security is significant as it is significant for people to sa

What is Port Stealing?

Cyber security is the security of the web and related services related to the web. Cyber security is the way to prevent many cyber attacks from taking place. Cyber security ensures that awareness of the cyber-attacks along with the different forms of cyber attacks are well-known to people so that they can prevent the cyber attacks from taking place

What is Source Port Randomization For Caching DNS ?

Source Port Randomization for Caching DNS is a technique used in the Domain Name System, which is a set of text files that translate alphanumeric domain names like “google.com” to numerical IP addresses like “74.125.79.125”. It is important because DNS is one of the most common ways to get around firewalls and proxy servers, which makes them useful

Man-in-the-Browser Attack

Cyber security in today's world is one of the biggest necessities of all time. It is important to safeguard the data that is present on the web. With the increasing demand for the internet and the services related to the internet, cyber crimes have become all the more common. It thus becomes important to protect the data and privacy of individuals,

What is a Default Password Attack Threat?

The term “attack” is used here to denote performing a variety of hacks, including brute force and social engineering, that require access to the target's computer system or network. Here are some terms and processes related to this skill boot camp: Brute ForcingPassword HashingCapture The Flag (CTF)PhishingBrute Forcing:Brute forcing is the process

What is Attack Surface?

Attack surface is the general term for the areas of a system, device, or network that contain security vulnerabilities that may be exploited. The attack surface of an organization's computer systems and devices can often vary significantly depending on what they are used for and how they have been configured. This is not to be confused with “attack

What is Codebook Attack?

The codebook attack is a very common password hacking technique where the hacker guesses the passwords of a user by using common phrases and words as password phrases. Hackers always use this method when a dictionary attack has not been able to retrieve any meaningful results. Codebooks are usually data stored in files on the web server, which cont

What is Sniffing Attack in System Hacking?

A sniffing attack in system hacking is a form of denial-of-service attack which is carried out by sniffing or capturing packets on the network, and then either sending them repeatedly to a victim machine or replaying them back to the sender with modifications. Sniffers are often used in system hacking as a tool for analyzing traffic patterns in a s

What is a Permanent DoS (PDoS) Attack?

In today's modern world, we often come across the term Cybercrime or Cyberattacks very frequently. With the increasing demand for the internet, cybercrime occurrence has taken a great spike. Cyber crimes are crimes involving cyber technology/computer networks. Cyberattacks are extremely dangerous as they involve stealing confidential user informati

BlueSmack Attack in Wireless Networks

Blue smacking is one of the older types of attacks against the protocol. In our investigation of this attack, you'll find that it's a variant of a common attack called denial of service against networks, devices, and applications. In short, when we perform a Blue smack attack, we perform a specially crafted package that can render a device unusable

What is Rogue DHCP Server Attack?

Rogue DHCP server attacks are gaining popularity but can be mitigated. The hacker sets up a rogue DHCP server and creates an IP address conflict by broadcasting a duplicate IP address. Hackers infiltrate a network by attacking the wireless router, which they do with ARP poisoning in order to inject rogue packets into the stream of data being proces

Pass-the-Hash (PtH) Attack

The Pass-the-Hash technique is published or established by Paul Ashton in 1997 and later it is modified or updated as a Samba SMB client in which it can accept the user password hashes instead of plain text passwords. The Pass-the-Hash Attack is the technique in which a hacker or an attacker captures the password in a hash function. After that, it

What is WSDL Attack?

A web service description language, known as WSDL, is used to describe and expose the interfaces of a system. It makes it possible for users to create software that works with services offered by other providers. When administrators/developers hardcode the URLs and user ids in the software, they are unintentionally leaking information about their s

What is Password Guessing Attack?

There are a number of methods to crack a user's password, but the most prominent one is a Password Guessing Attack. Basically, this is a process of attempting to gain the system's access by trying on all the possible passwords (guessing passwords). If the attacker manages to guess the correct one, he has complete access to the remote system, can ma

What is Authentication Attack?

An identification attack is a type of social engineering attack in which the attacker tries to gain information from public sources such as public records and directories, data listings from websites and social media sites, or through research. This is a form of information gathering that is done for any number of reasons, however, this type of att

HTTP Flood Attack

Computers are a necessity in today's world. Our daily activities involve computers, making them a significant part of the modern world. Over the years, the use of computers has grown significantly. With the increasing demand for computers and related services, including computer and internet-related services, we often hear about internet crimes or

Session Fixation Attack

A session fixation attack is a type of remote code execution attack which is used to exploit software designed with the web-server Session Management feature. When a website is running an HTTP server, the server's session state information can be stolen and then retrieved by an attacker to take over the browser or use it for further attacks. There

DHCP Starvation Attack

DHCP (Dynamic Host Configuration Protocol) is used to assign IP addresses to machines within any network automatically. It is also known as zeroconf protocol, as network administrators don't need to assign IP addresses to machines manually. To assign IP addresses, DHCP makes use of DORA packets which stands for Discover message, offer message, Requ

Bluesnarfing Attack in Wireless Networks

Bluetooth is a standard protocol that is used for connecting many other devices. These devices can be other computers, laptops, smartphones, or other I/O devices. Bluetooth uses radio transmissions to communicate with a frequency range similar to Wi-Fi. Bluetooth uses low power when compared to other mediums of information. Bluetooth devices always

Ping Flood Attack

Cybersecurity is the most essential requirement for anybody and everybody connected with the internet. Internet and cybersecurity go hand in hand. Data that is available on the internet needs to be safe and secure for users and organizations to protect their privacy. Cybersecurity governs the best practices which can prevent hackers from unethicall

What is Credential Harvester Attack ?

A credential harvester attack is a type of cyberattack in which the malicious actor acquires sensitive information. Generally, this information is stored on an online service and is acquired without the consent of the owner or user, and it may be used to impersonate them or pose as them in other contexts. Credential harvesters are used for harvesti

What is Canonicalization Attack?

Canonicalization is the process of mapping inputs to their canonical equivalent. It is often used for cryptographic algorithms and data that are intended to be secured from tampering, usually by hashing. In computer security, a Canonicalizations attack aims to find or compute the mapping between two different inputs which produce the same output wh

Session Prediction Software Attack

Session prediction attacks focus on predicting session ID values ​​that allow an attacker to bypass the application's authentication scheme. By analyzing and understanding the session ID generation process, an attacker could predict a valid session ID value and gain access to the application. The attacker needs to collect some valid session ID valu