Steat And Threats And Attacks In The Network

Networking is part of our everyday lives now. Weather is us using our phones, computer, using GPS for directions, watching 3D movies and TV’s or in our work environments. Network Security has become search a big issue since our day to day live started to be more involve with us. These problems involve in all type of shapes and forms where some of these issues are cyber attacks, physical attacks, or abuse of policies. People are really exposed due to the amount of internet activities we have going on in most of our networks. There are two fundamentally different when it comes to networking, the data networks and the synchronous network comprised of switches. With that being said there are also

TCP SYN Flood : A SYN flood attack works by not responding to the server with the expected ACK code.

False Data Insertion: - An adversary can compromise existing nodes and inject a false message with false information. It is also possible that the adversary add new nodes to the sensor networks that feed false data. Such attack also consumes the energy resources of other sensor nodes.

These neighborsmay themselves be exhausted prematurely, causing a hole or partition in the network. 3.3. Hello Flood Attack. Many routing protocols use “Hello” broadcastmessages to announce themselves to their neighbor nodes. The nodes that receive this message assume that source nodes are within range and add source nodes to their

Figure 1.3: Location disclosure Attack As shown in figure 1.3 node M1 collect all topology information & either discloses it to other malicious node M2 or itself uses for attack on any other node for example M1 would send fake Message to S. Introduction to MANET P a g e | 20 Flooding: In this type of attack, attacker (malicious) node(s) broadcast false packets or ghost packets which have wrong routing information & drain valuable resources like battery, processing power, and bandwidth. It leads to increased traffic in network, keeping nodes busy and reduced network performance. Denial of Service (DoS) attack: This type of attack has similarity with Flooding type of attacks.

In this report I will be describing the ways in which networks can be attacked, also be giving real life example of each of the below.

The attacker counts the number of packet transmissions executed by each node in a region for a period of time. If the nodes are sending to a common destination node e.g., the sink node, then the latter should be located in a region of higher packet transmissions or

In this example, here node A wants to send data packets to node D and starts to find the shortest path for its destination, so if node D is a malicious node then it will show that it has active route to the specified destination. It will then send the response In the example, data packets transfer in a hierarchic data center network. The link capacity is 1000 kb/s. The number on each is the traffic load. The distribution of traffic is based on equal cost multi-path (ECMP). In figure 8, we can see that the 3). Congestions

A malicious node can impersonate or spoof the address of another node in order to alter the vision of the network topology as perceived by another node. Such attacks can result in the formation of loops as described below [18]

The basic idea is to set up a monitor at each node in the network to produce evidences and to share them among all the nodes .An evidence is a set of relevant information about the network

A man-in-the-middle attack is a type of cyber attack where a malicious actor inserts him/herself into a conversation between two parties, impersonates both parties & gains access to information that the two parties were trying to send to each other. A man-in-the-middle attack allows a malicious actor to intercept, send & receive data meant for someone else,

Denial-of-Service attack (DoS) when a hacker continuously attacks a particular network or dedicated Access Point (AP) with fake requests, failure messages and premature successful connection messages and other commands. These causes authorized users from preventing connecting to the network and results in network failure or crash. These attacks depends on misuse of protocols like Extensible Authentication Protocol (EAP).

Replay attack | An attack in which the attacker captures data packets from a network and retrans- mits them to produce an unauthorized effect

It is the term to describe the attacks targeting their results or position, let’s say the denial of service

tackers. For example, an attacker might want to get control of an IRC channel via