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In computer networking, a media access control attack or MAC flooding is a technique employed to compromise the security of network switches.The attack works by forcing legitimate MAC table contents out of the switch and forcing a unicast flooding behavior potentially sending sensitive information to portions of the network where it is not normally intended to go.
The BlackNurse attack is a form of denial of service attack based on ICMP flooding. The attack is special because a modest bandwidth of 20 Mbit/s can be effective for disrupting a victim's network. [1] The attack consists of sending ICMP Destination Unreachable packets to a destination. This works because these packets caused the destination to ...
In computer networking, port knocking is a method of externally opening ports on a firewall by generating a connection attempt on a set of prespecified closed ports. Once a correct sequence of connection attempts is received, the firewall rules are dynamically modified to allow the host which sent the connection attempts to connect over specific port(s).
A ping of death is a type of attack on a computer system that involves sending a malformed or otherwise malicious ping to a computer. [1] In this attack, a host sends hundreds of ping requests with a packet size that is large or illegal to another host to try to take it offline or to keep it preoccupied responding with ICMP Echo replies.
In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on configurable security rules. [1] [2] A firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet, [3] or between several VLANs.
It is an active reconnaissance network security analysis technique that attempts to determine which layer 4 protocols a specific firewall will allow. Firewalk is a software tool that performs Firewalking. To protect a firewall or gateway against firewalking one can block outgoing TTL messages to avoid exposing information about your network.
Little Snitch is a host-based application firewall for macOS. It can be used to monitor applications, preventing or permitting them to connect to attached networks through advanced rules. It is produced and maintained by the Austrian firm Objective Development Software GmbH.
In March 2016 Apple shut down the first ransomware attack targeted against Mac users, encrypting the users' confidential information. [8] It was known as KeRanger.After completing the encryption process, KeRanger demanded that victims pay one bitcoin (about US$400 at the time, about US$57,364.10 as of July 9, 2024) for the user to recover their credentials.