IP Spoofing Definition:
IP Spoofing is a technique where an attacker disguises their identity by modifying the source IP (Internet Protocol) address in the header of a packet to appear as though it originates from a trusted source. This technique is used to gain unauthorised access to networks, bypass security controls, or conduct attacks while hiding the attacker’s true identity.
What is IP Spoofing?
IP Spoofing works by altering the IP address in packet headers, making it look as if the data is coming from a different source. This method allows attackers to masquerade as a legitimate device or user, potentially bypassing access controls and Firewalls that rely on IP-based security rules. IP Spoofing is commonly used in denial-of-service (DoS) attacks and to gain unauthorised access.
Why is IP Spoofing important?
The purpose of IP Spoofing is to deceive the target system by making the communication appear legitimate. Attackers use IP Spoofing to bypass IP-based Authentication mechanisms, hide their actual location, or overwhelm a target with traffic. IP Spoofing is particularly dangerous in attacks that require trust, such as man-in-the-middle (MITM) and DoS attacks.
How does IP Spoofing work?
Attackers perform IP Spoofing by modifying the source IP address in the packet header. This can be done through specialised software that allows the attacker to send packets with forged IP addresses. In DoS attacks, for instance, attackers often spoof IP addresses to send large volumes of traffic to a target without revealing their real source, making it harder for defenders to block or trace the attacker.
IP Spoofing Examples:
Examples of IP Spoofing include DoS attacks, where attackers use multiple spoofed IP addresses to flood a target server, and Session Hijacking attacks, where spoofed packets are sent to impersonate a trusted device. Another example is MITM attacks, where spoofed IP addresses are used to intercept communication between two parties.
IP Spoofing Issues:
IP Spoofing presents a significant security risk as it allows attackers to evade detection and impersonate legitimate users. Defending against IP Spoofing requires network monitoring, packet filtering, and implementing anti-spoofing controls like ingress and egress filtering to verify packet sources. Organisations should also use Encryption and Authentication mechanisms to prevent spoofing-related attacks.
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