Firewall Essay

The Smurf Attack: Smurf attack is a distributed denial-of-service attack where large numbers of Internet Control Message Protocol (ICMP) packets with the intended victim's spoofed source IP are broadcast to a computer network using an IP Broadcast address.

3.2. BlackHole. In this attack,malicious nodes advertise very short paths (sometimes zero-cost paths) to every other node, forming routing black holes within the network [41]. As their advertisement propagates, the network routes more traffic in their direction. In addition to disrupting traffic delivery, this causes intense resource contention around the malicious node as neighbors compete for limited bandwidth.

(b) Redirection with modified hop count: This type of attack is targeted against the AODV protocol in which a malicious node can increase the chances that they are included on a newly created route by resetting the hop count field of a RREQ packet to zero. [17]

By using the border, internal and host firewalls, this is what creates defense in depth. Because an attacker must defeat all of these devices in order to get into a company’s network to cause great damage (Boyle & Panko, 2015, pp.

A firewall protects networked computers from intentional hostile intrusion that could compromise confidentiality or result in data corruption or denial of service. It may be a hardware device or a software program running on a secure host computer. It must have at least two network interfaces, one of the network it is intended to protect, and one for the network it exposed

To reduce the risk of these types of attacks, routers should be hardened, packet filtering controls should be used and routing information should be controlled.

We first describe the characteristics of an traffic analysis attacker (with respect to wireless networks) before elaborating on the types of traffic analysis techniques that the attacker can use to compromise privacy.

Information security is a business requirement and also a legal requirement, subsequently firewalls are set up as security from viruses and backups are implemented to ensure no information is lost.

Firewall is “a computer security program that blocks incoming network traffic based on certain predetermined criteria”. Firewalls have details logs, that can hold a wealth of information about the network to the forensics investigations. The firewall logs can also have details about the hardware failures. Successful/unsuccessful connection attempts, users added on, and any permissions changed. You can also find evidence on the backdoors.

The firewall comes in hardware or software form and acts as a filter for all data

Sockets is the form of communication (UDP and TCP) use the socket abstraction, which provides an endpoint for communication between processes to processes. Interprocess communication consists of transmitting a message between a socket in one process and a socket in another process. As the IP packets underlying UDP and TCP are sent to Internet addresses.

Firewall: A firewall is a software or hardware-based network security system that controls the incoming and outgoing network traffic by analysing the data packets and

The private-public network edge is considered particularly vulnerable to intrusions, because the Internet is a publicly accessible network and falls under the management purview of multiple network operators. For these reasons, the Internet is considered an untrusted network. So are wireless LANs, which-without the proper

This is an open exposure due to the uncertainties of the internet. Controlling access to information systems and associated networks is necessary for the preservation of their confidentiality, integrity, and availability. Confidentiality assures that the information is not disclosed to unauthorized persons or processes. Any automated attacks or personal attack or attack to exploit the company secrets/statistics/data is the biggest threat to that may occur without the firewall.

Generally, firewalls are configured to protect against unauthenticated interactive logins from the outside world. This protection, more than anything, helps prevent vandals from logging on to machines on your network. More elaborate firewalls block traffic from the outside to the inside but permit users on the inside to communicate freely with the outside. The firewall can protect you against any type of network-borne attack if you unplug it.