At tyler, we take a layered approach, called defenseindepth. These diagrams should identify hardware, software, and network components, internal and external connections, and types of information passed between systems to facilitate the development of a defenseindepth security architecture. Overview of cisco unified wireless network architecture 212. The importance of defense in depth and layered security. The level of abstraction provided in a reference architecture is a function of its intended usage. Architectural diagrams showing how each vendor addresses this infrastructure appear throughout this article. What is defense in depth benefits of layered security imperva. The concept has been around for a while and is based on the military idea that in battle, its more difficult for the enemy to break through a complex and multilayered defense system than a single barrier. This paper will look at three common scenarios, and likely methods for network attacks, and offer countermeasures to. Eap tunneled tls authentication protocol eapttls 224. Organizations need to defend their networks on each of the six levels in the diagram you see.
Section v provides an example system in which we have implemented defense in depth from the ground up. The information security architecture at the individual information system level is consistent with and complements the more global, organizationwide information security architecture described in pm7 that is integral to and developed as part of the enterprise. Maintenance of various field devices, telemetry collection, andor industriallevel. Defense in depth is the concept of protecting a computer network with a series of. Learn how microsoft designs and operates azure, and get an overview of azure services and capabilities to secure, manage and monitor your cloud data, apps and infrastructure. This method addresses vulnerabilities in technology, personnel and operations for the duration of a systems life cycle. Security information and event management implementation. Before you can penetrate a castle you are faced with the moat, ramparts, drawbridge, towers, battlements and so on.
This paper discusses about defense in depth model and strategy to implement it. Owasp reverse engineering and code modification prevention. We explore the security challenges found at the edges of the ics in section iv. Defense in depth is the concept of pr otecting a computer network with a series of defensive mechanisms such that if one mechanism fails, another will already be in place to thwart an attack. A holistic defenseindepth approach defenseindepth is a concept that is already widely deployed by many organizations within their it infrastructures. Defense in depth helps you protect network resources even if one of the security.
Understanding layered security and defense in depth techrepublic. One of the fundamental guiding principles for network protection is defense in depth. Authentication and authorization of wireless users 216. In studying the problem of adding defense in depth, weve identi. This document provides guidance and direction for developing defenseindepth strategies for organizations that use control system networks while maintaining a multitier information architecture that requires.
The border routers and firewalls are used in the same way as moats and sally ports. Recently, there has been a shift towards software defined radios due to the flexibility software implementations provide. Defense in depth, however, must be done to some threat model. As a general rule, it is always a good idea to have multiple prevention mechanisms, at multiple levels, to guard your network and the resources on it. According to viega and mcgraw viega 02 in chapter 5, guiding principles for software security, in principle 2. Defense in depth is not a product, like a perimeter.
Defense in depth is recommended by the national security agency nsa as a information security strategy. Designing a defenseindepth network security model we challenged networking and firewall vendors to provide defenseindepth security from the perimeter to the core. Supplemental guidance this control addresses actions taken by organizations in the design and development of information systems. Defense in depth by todd mcguiness november 11, 2001.
Defense in depth is a concept used in information security in which multiple layers of security controls defense are placed throughout an information technology it system. Abstract defenseindepth is an important security architecture principle that has significant application to industrial control systems ics, cloud services, storehouses of sensitive data, and many other areas. When you peel away the outermost layer, many remain underneath it. Powerful diagramming software including thousands of templates, tools and symbols. Defense in depth is commonly refered to as the castle approach because it mirrors the layered defenses of a medieval castle. Defense in depth a practical strategy for achieving information assurance in todays highly networked environments. Ampere, nvidias latest gpu architecture is finally here spankingnew acceleration for ai across the board meet morpheus, the ai thatll show you how deep the universes rabbit hole goes. Hitefield abstract modern wireless communications systems are constantly evolving and growing more complex.
Multilayered network security strategy solarwinds msp. The definition of defense in depthis the implementation of multiple security measuresto protect the most valuable resources on your. Using a defense in depth strategy as part of your security architecture keeps. Multilayered security is a network security approach that uses a number of components to protect your clients operations with multiple levels of security measures as a managed service provider msp, you want to offer customers bestinclass services while differentiating yourself from the competition and increasing your companys profitability. Navy finalizes 8 cybersecurity standards, now available to. The siting of mutually supporting defense positions designed to absorb and progressively weaken attack, prevent initial observations of the whole position by the enemy, and to allow the commander to maneuver reserve forces.
Use a firewall to prevent access to all network ports other than that of the outward facing web server. Defense in depth did is an approach to cybersecurity in which a series of defensive. As part of a defense in depth strategy, abac supports what can be called an any depth protection approach. Measuring and improving the effectiveness of defensein. A strong security architecture will be less effective if there is no process in place. Defense in depth perimeter security fundamentals informit. Its possible through defense in depth, a security posture that has multiple redundant layers that monitor and protect an entire network.
Full ms office, box, jira, gsuite, confluence and trello integrations. A defenseindepth strategy is more than just implementing technology. For example, if you expect a firewall to protect you, build the system as though the firewall has been compromised. Defense in depth is the act of using multiple security measures to protect the integrity of information. It is a best practices strategy in that it relies on the. It is designed this way so that security is not dependent on any single layer, especially in the event of an attack.
A defenseindepth security architecture for software defined radio systems seth d. Section iii dives into the security at each level of the diagram. Physical controls these controls include security measures that prevent physical access to it systems, such as security guards or locked doors. Components of defense in depth include antivirus software, firewalls, antispyware programs, hierarchical passwords, intrusion detection and biometric verification. Defense in depth did is an approach to cybersecurity in which a series of defensive mechanisms are layered in order to protect valuable data and information. Defense in depth assumes that no solution is foolproof and, as such, provides for the addition of monitoring, alerting and recovery. Lets examine five components of a strong defense in depth approach that can protect your data and offer a better view of your it environment. The basics of defense in depth the first step of a defense in depth strategy to protect against network breaches should be to establish proper access control systems. What is defense in depth benefits of layered security. Before granting access rights, an enterprises system should check whether users have the correct device identities software, hardware and network attributes and user. If one mechanism fails, another steps up immediately to thwart an attack. In studying the problem of adding defenseindepth, weve identi. No concept carries more importance when discussing network security than defense in depth.
Defense in depth, at the university of iowa, is a combination of controls implemented at the enterprise level, at the service provider level, and at. A defenseindepth security architecture for software. Given time, defense in depth assumes an attacker will breach network security measures. Its intent is to provide redundancy in the event a security control fails or a vulnerability is exploited that can cover aspects of personnel, procedural, technical and physical security for the duration of the systems. Owasp is a nonprofit foundation that works to improve the security of software. Hardware, software, and network level protection is included within a. Defense in depth is a concept used in information security in which multiple layers of security controls defense are placed throughout an information.
A brief history on defense in depth cybersecurity defense in depth dates to the 1990s, however it originated with the roman empire beginning roughly in 200 ad. The castle is not invincible, but the defenseindepth architecture is one to carefully consider. Download scientific diagram layers of defense in depth architecture. Defense in depth is a strategy using multiple security measures to protect the integrity of. Defense in depth functional implementation architecture. A vendor providing software to protect endusers from cyberattacks can bundle multiple security offerings in the same product.
Designing a defenseindepth network security model searchsecurity. Defenseindepth security for industrial control systems. Defenseindepth user protection involves a combination of security offerings e. Instead, it is a security architecture that calls for the network to be aware and selfprotective. Defenseindepth security architecture is based on controls that are designed to protect the physical, technical and administrative aspects of your network. A key element of the abac process is the ability to intercept attempted access to protected resources and this can be accomplished at different. In fact, a reference architecture for one subject area can be a specialization of a more general reference architecture in another subject area. Section ii discusses defense in depth as it applies to an ics at a high level. A wellstructured defense architecture treats security of the network like an onion. The idea is to incorporate information security at every level of your physical, network and software landscape topology. The diagram shown in figure 5 depicts an integrated architecture that includes con. We can employ many elements from castle architecture in our networks.
I want to share a model called defense in depth that i learned from my security courses at the sans institute and have since used in my daily job. These three controls build the architecture of a defense in depth strategy. Security measures such as demilitarized zones dmz, firewall, intrusion detection system ids, malware protection and virtual private networks vpns provide defense in. Antivirus software is critical to protecting against viruses and malware. Encrypt all sensitive data like employee records when stored at rest, for example on the hard drive. This strategy is more comprehensive and encompasses layered security. Owasp reverse engineering and code modification prevention on the main website for the owasp foundation. In this azure essentials, we also go indepth on the controls of the azure security center and explain the controls your can leverage as well as what microsoft does to. Defense in depth is a security discipline that refers to having layers of protection in an it infrastructure. Defense in depth is practical strategy for achieving information assurance in todays highly networked environments. Layered defense in depth model for it organizations international. The document presents this information in four parts. That approach is actually something thats not new,thats been existing for many years,and a security approach thats adoptedby many security experts,which is a defense in depth approach. Prior to this, the romans utilized a forward defense, whereby they pushed their military into enemy territories to stop attacks before they even reached roman soil.
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