Firewall Essay

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: 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 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.

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.

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.

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.

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.

6) How does the use of border, internal, and host firewalls provide defense in depth?

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

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

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

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]

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.

A firewall is a system or group of systems that enforces an access control policy between two or more networks. The means by which this control is accomplished varies widely, but in principle, the firewall is a pair of mechanisms, one that blocks traffic and one that permits traffic. Some firewalls emphasize blocking traffic, while others emphasize permitting traffic. The most important thing to recognize about a firewall is that it implements an access control policy. If you don't know what kind of access you want to permit or deny, or you let someone else or some product configure a firewall based on judgment other than yours, that entity is making policy for your whole organization.