There are numerous network security devices and tools available to aid in computer network defense, and these tools are often relied upon for protecting against increasingly sophisticated, stealthy, and damaging attacks. When acting alone, the current generation of security devices has an exceedingly difficult time providing an effective defense against such threats, and the situation is particularly grim for targeted or novel attacks.
It has been demonstrated that a number of interoperable systems must be implemented to fully protect a network; a strategy known as Defense in Depth. Due to the multitude of security devices and device categories available, it can be very difficult to identify the correct tools for meeting security goals. Using the Defense in Depth strategy will require an understanding of the interactions between devices occuring within the network.
Due to their complexity and importance to information security, two security systems, Network Intrusion Detection/Prevention Systems (NIDPS) and Security Information and Event Management systems (SIEM), will be explored in this paper. Both have multiple functionalities, including threat-detecting capabilities, and are widely considered essential tools for adequate network defense, particularly in the goal of fortifying valuable assets in the face of an advanced threat. Understanding these systems is vital for any security operation tasked with defending significant networks.
2 Network Intrusion Detection/Prevention Systems
2.1 IDPS Definitions
Although Intrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS) have been grouped together here (IDPS), there are distinctions between them. On the most basic level, both will monitor the network...
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If the alert is made when there is actually no security incident, it is known as a false positive. Because these systems are often automated, they must be tuned to decrease false positives. It is often necessary to have many false positives in order to avoid not detecting a real incident (known as a false negative). This leads into a major shortcoming of IPSs: because IPSs are intended to operate inline with the network and drop malicious packets, if they issue a false positive it means that the system is dropping legitimate traffic. The network will be DoS-ing itself.
The play-off between security and usability is evident in pure IDS as well; desensitizing the IDS will allow incidents to go unnoticed, yet too many false positives will cloud the system (or the system administrators). Therefore it is important to understand how the detection mechanisms work.
The analysis will allow the NIDS to alert on activity which could be a sign of unauthorized access or malicious activity. The IT security team will check the alerts to determine if an event or incident has occurred. Similarly, an HIDS application will be installed on all servers and workstations. The HIDS application will analyze the servers and workstation and check the system logs to determine if any potential unauthorized or malicious activity has occurred and send the information to the NIDS for processing and alert creation.
IDS is a device or software application that monitors a network for an unauthorised attack.
and their use. In Committee on Deterring Cyber attacks: Informing Strategies and Developing Options (Ed.), Proceedings of a Workshop on Deterring Cyber attacks: Informing Strategies and Developing Options for U.S. Policy. Washington, D.C.: National Academies Press.
The Aim Higher College’s system administrators and network engineers have described seeing some strange behaviors such as high levels of traffic from many hosts that are causing system outages. The web servers of the college have been shutting down frequently by this traffic, it must be from a hacker group trying to attack the school with malicious software. I will review the network traffic from the college’s intrusion detection system and use an intrusion prevention system to block off these threats from the hackers.
Progressive technological development has paved the way for the ever increasing addition of multiple disparate devices. Devices which have the capability to connect to each other over a network affording them the ability to communicate with ease. Unfortunately the improved proficiency for communication carries with it a negative impact on information security. This detriment comes through the increased possibility of data loss and vulnerability exploitation. In this paper, we will seek to define one such measure to ensure security; by utilizing the Trusted Platform Module (TPM). We will also explore the strengths and vulnerabilities of the Trusted Platform Module as well as attacks against the TPM both in terms of hardware and software.
There is constant concern about different kinds of devices and tools because of their vulnerability: laptops; personal computers in the home; libraries and public workstations; USB Flash Drives and email, to name a few. These items are easily accessible for those attempting to breach security.... ... middle of paper ... ...
In 1980, James Anderson’s paper, Computer Security Threat Monitoring and Surveillance, bore the notion of intrusion detection. Through government funding and serious corporate interest allowed for intrusion detection systems(IDS) to develope into their current state. So what exactly is IDS? An IDS is used to detect malicious network traffic and computer usage through attack signatures. The IDS watches for attacks not only from incoming internet traffic but also for attacks that originate in the system. When a potential attack is detected the IDS logs the information and sends an alert to the console. How the alert is detected and handled at is dependent on the type of IDS in place. Through this paper we will discuss the different types of IDS and how they detect and handle the alerts, the difference between a passive and a reactive system and some general IDS intrusion invasion techniques.
This informational report will explain and guide you through the process and plan that will be implemented to prevent any unauthorized equipment (including external rogue switches) from entering the network. In addition we will be implementing the spanning tree protocol to eliminate any layer 2 loops and ultimately causing a network storm.
In conclusion, the information covered in this paper shows the different types of security that is associated with each level of the standard OSI model. From the physical layer to the application layer, each layer has a different type of security which must be applied at each layer to prevent any security leaks, spoofing, and infinite loops. These are just a few of the different vulnerabilities that must be protected on a WLAN or LAN.
Over the last few years, the amount of cyber crimes has skyrocketed. The department of energy alone estimates they get attacked 10 million times every single day. Some of these are very simple scans, while others are high key attacks. When making these hacking attacks however, hackers don't use their own ip address. Instead they go through another device that is connected to the internet.
Roberts, Richard M. "Network Secrurity." Networking Fundamentals. 2nd ed. Tinley Park, IL: Goodheart-Willcox, 2005. 599-639. Print.
When someone suspects that an unauthorized, unacceptable, or unlawful event has occurred involving an organization’s computer networks or data-processing equipment Computer security incidents are normally identified. Initially, the incident may be reported by an ultimate user, detected by a system administrator, identified by IDS alerts, or discovered
Thus all the users should be given appropriate training on how to use secure their data when they are at home or at the corporate premises. A combined effort of users, employers and system administrators is required in order to fight against such malicious activities. Appropriate countermeasures in every form can help the organization minimize the risk of illegal penetration. Up to date tools, constant monitoring, proper management and appropriate countermeasures are all the ultimate weapons to fight against the wireless security
The overall recommendation of "…the use of such identification badges to all of our clients." sounds reasonible. A closer look at the conclusion that identification badges alone will resolve the greater issue of employee theft is difficult to support with the amount and type of data given. In today's complex business environment, an identification badge would not address much greater corporate assets and their protection. To the technology industry for ...
Without proper protection, any part of any network can be susceptible to attacks or unauthorized activity. Routers, switches, and hosts can all be violated by professional hackers, company competitors. In fact, according to several studies, more than half of all network attacks are waged internally. To determine the best ways to protect against attacks, we should understand the many types of attacks that can be instigated and the damage that these attacks can cause to data. The most common types of attacks include Denial of Service (DoS), password, an...