Explore 9 essential elements of network security and why they matter

Worldwide, IT organizations spend more than $20 billion per year on hardware and software across a wide variety of network security components. Research from Doyle Research and Security Mindsets forecasted that this spending will reach nearly $25 billion by 2024. Dozens of suppliers focus on unique security capabilities, and most large organizations use multiple vendors and various elements of network security to strengthen their security posture and defense.

Network security is not one-size-fits-all, as it typically comprises different components. Below, we explore nine elements of network security and their roles in a security strategy. Please note that these components are not mutually exclusive, as many features and technologies overlap in various suppliers' offerings.

Explore 9 essential elements of network security

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In the four elements of network security below -- network access control (NAC), cloud access security broker (CASB), DDoS mitigation and network behavior anomaly detection (NBAD) -- each generates less than $1 billion in spending, according to Doyle Research and Security Mindsets. Combined, however, they account for about 11% of the total market, and they are all growth categories.

The elements of network security and networking functionality continue to intersect. For example, many network vendors offer security features, and security vendors offer networking functionality. This is especially prevalent in SD-WAN and software-defined branch.

This is especially true for network security in 2020, as many organizations moved network resources to cloud environments and remote workforces grew as a result of the COVID-19 pandemic. Three networking bloggers explored different aspects of network security in 2020: zero-trust networks, network access control (NAC) and software-defined branch (SD-branch).

Footman explored NAC for 802.1x -- a security protocol for 802.11-compliant wireless LANs -- as well as requirements for 802.1x Extensible Authentication Protocol (EAP). EAP is arguably more accessible than Media Access Control address-based authentication, Footman said, as network engineers use MAC address-based authentication primarily for devices that can't use 802.1x EAP, including uninterruptible power supply devices or IP cameras.

Network monitoring is the bedrock of network management, providing enterprises with real-time insights into network elements, performance, productivity, and security. When you monitor networks, you can identify security risks and other anomalies quickly.

Another benefit of network monitoring is measuring over-used and under-used network elements. This improves network performance with less waste of valuable resources, giving you more bang for your buck. Minor changes to networks have an enormous impact on workflows, slowing down productivity and reducing cybercrime.

Organizations are able to use network monitoring to stay on top of vital elements and fix minor issues before they become problems, keeping the business flowing smoothly. Organizations should facilitate network monitoring regularly to get value.

What is network security? Well, beyond the definition, the security tools and the strategies, network security is essentially the power to protect your business and your customers. That means understanding the threats and the solutions and knowing how to use that information to build a robust and inclusive network security strategy.

Introduction to Physical Security Commonly Asked Questions Policy Issues Physical Security Countermeasures Physical Security Checklist Introduction to Physical SecurityMost people think about locks, bars, alarms, and uniformed guards whenthey think about security. While these countermeasures are by nomeans the only precautions that need to be considered when trying tosecure an information system, they are a perfectly logical place to begin.Physical security is a vital part of any security plan and is fundamental to allsecurity efforts--without it, information security (Chapter 6), softwaresecurity (Chapter 7), user access security (Chapter 8), and networksecurity (Chapter 9) are considerably more difficult, if not impossible, toinitiate. Physical security refers to the protection of building sites andequipment (and all information and software contained therein) fromtheft, vandalism, natural disaster, manmade catastrophes, and accidentaldamage (e.g., from electrical surges, extreme temperatures, and spilledcoffee). It requires solid building construction, suitable emergencypreparedness, reliable power supplies, adequate climate control, and appropriate protection from intruders. Commonly Asked QuestionsQ.How can I implement adequate site security when I am stuck in anold and decrepit facility?A.Securing your site is usually the result of a series of compromises--what you need versus what you can afford and implement. Ideally, oldand unusable buildings are replaced by modern and more serviceablefacilities, but that is not always the case in the real world. If you findyourself in this situation, use the risk assessment process described inChapter 2 to identify your vulnerabilities and become aware of your preferred security solutions. Implement those solutions that you can, withthe understanding that any steps you take make your system that muchmore secure than it had been. When it comes time to argue for newfacilities, documenting those vulnerabilities that were not addressed earliershould contribute to your evidence of need.Q.Even if we wanted to implement these physical security guidelines,how would we go about doing so?A.Deciding which recommendations to adopt is the most important step.Your risk assessment results should arm you with the informationrequired to make sound decisions. Your findings might even show that notevery guideline is required to meet the specific needs of your site (andthere will certainly be some variation based on need priorities). Oncedecided on, however, actually initiating a strategy is often as simple asraising staff awareness and insisting on adherence to regulations. Somestrategies might require basic &quot'handyman&quot' skills to install simple equipment(e.g., key locks, fire extinguishers, and surge protectors), while othersdefinitely demand the services of consultants or contractors with specialexpertise (e.g., window bars, automatic fire equipment, and alarmsystems). In any case, if the organization determines that it is necessaryand feasible to implement a given security strategy, installing equipmentshould not require effort beyond routine procedures for completing internalwork orders and hiring reputable contractors.Determining countermeasures often requires creativity: don't limit yourself to traditional solutions. Q.What if my budget won't allow for hiring full-time security guards?A. Hiring full-time guards is only one of many options for dealing withsecurity monitoring activities. Part-time staff on watch duringparticularly critical periods is another. So are video cameras and the use ofother staff (from managers to receptionists) who are trained to monitorsecurity as a part of their duties. The point is that by brainstorming a rangeof possible countermeasure solutions you can come up with severaleffective ways to monitor your workplace. The key is that the function isbeing performed. How it is done is secondary--and completely up to theorganization and its unique requirements. Guidelines for security policy development can be found in Chapter 3. Policy IssuesPhysical security requires that building site(s) be safeguarded in a way thatminimizes the risk of resource theft and destruction. To accomplishthis, decision-makers must be concerned about building construction, roomassignments, emergency procedures, regulations governing equipmentplacement and use, power supplies, product handling, and relationshipswith outside contractors and agencies.The physical plant must be satisfactorily secured to prevent thosepeople who are not authorized to enter the site and use equipment fromdoing so. A building does not need to feel like a fort to be safe. Well-conceivedplans to secure a building can be initiated without adding undueburden on your staff. After all, if they require access, they will receive it--as long as they were aware of, and abide by, the organization's statedsecurity policies and guidelines (see Chapter 3). The only way to ensurethis is to demand that before any person is given access to your system,they have first signed and returned a valid Security Agreement. Thisnecessary security policy is too important to permit exceptions.As discussed more completely in Chapter 2, a threat is any action, actor, or event that contributes to risk Physical Threats (Examples)Examples of physical threats include:Natural events (e.g., floods, earthquakes, and tornados)Other environmental conditions (e.g., extreme temperatures, high humidity, heavy rains, and lightning)Intentional acts of destruction (e.g., theft, vandalism, and arson)Unintentionally destructive acts (e.g., spilled drinks, overloaded electrical outlets, and bad plumbing) A countermeasure is a strp planned and taken in opposition to another act or potential act. Physical Security CountermeasuresThe following countermeasures address physical security concerns thatcould affect your site(s) and equipment. These strategies arerecommended when risk assessment identifies or confirms the need tocounter potential breaches in the physical security of your system. Countermeasures come in a variety of sizes, shapes, and levelsof complexity. This document endeavors to describe a range ofstrategies that are potentially applicable to life in educationorganizations. In an effort to maintain this focus, thosecountermeasures that are unlikely to be applied in educationorganizations are not included here. If after your risk assessment,for example, your security team determines that your organizationrequires high-end countermeasures like retinal scanners or voiceanalyzers, you will need to refer to other security references andperhaps even need to hire a reliable technical consultant. Create a Secure Environment: Building and Room Construction:17Don't arouse unnecessary interest in your critical facilities: A secureroom should have "low" visibility (e.g., there should not be signsin front of the building and scattered throughout the hallwaysannouncing "expensive equipment and sensitive informationthis way").Select only those countermeasures that meetpercuived needs as indentified during riskassessment (Chapter 2) and supportsecurity policy (Chapter 3). Maximize structural protection: A secure room should have fullheight walls and fireproof ceilings.Minimize external access (doors): A secure room should only haveone or two doors--they should be solid, fireproof, lockable, andobservable by assigned security staff. Doors to the secure roomshould never be propped open.Minimize external access (windows): A secure room should nothave excessively large windows. All windows should have locks.Maintain locking devices responsibly: Locking doors and windowscan be an effective security strategy as long as appropriateauthorities maintain the keys and combinations responsibly. Ifthere is a breach, each compromised lock should be changed.Investigate options other than traditional keyhole locks for securingareas as is reasonable: Based on the findings from your riskassessment (see Chapter 2), consider alternative physical security strategies such as window bars, anti-theft cabling (i.e., an alarm sounds when any piece of equipment is disconnected from the system), magnetic key cards, and motion detectors. Recognize that some countermeasures are ideals and may not be feasible if, for example, your organization is housed in an old building.Be prepared for fire emergencies: In an ideal world, a secure roomshould be protected from fire by an automatic fire-fightingsystem. Note that water can damage electronic equipment, socarbon dioxide systems or halogen agents are recommended. Ifimplemented, staff must be trained to use gas masks and otherprotective equipment. Manual fire fighting equipment (i.e., fireextinguishers) should also be readily available and staff should beproperly trained in their use.Maintain a reasonable climate within the room: A good rule ofthumb is that if people are comfortable, then equipment isusually comfortable--but even if people have gone home for thenight, room temperature and humidity cannot be allowed toreach extremes (i.e., it should be kept between 50 and 80degrees Fahrenheit and 20 and 80 percent humidity). Note thatit's not freezing temperatures that damage disks, but thecondensation that forms when they thaw out.Be particularly careful with non-essential materials in a securecomputer room: Technically, this guideline should read "no eating,drinking, or smoking near computers," but it is quite probablyimpossible to convince staff to implement such a regulation.Other non-essential materials that can cause problems in asecure environment and, therefore, should be eliminated includecurtains, reams of paper, and other flammables. Don't say it if you don't mean it--instituting policies that you don't bother to enforce makes users wonder whether you're serious about other rules as well. Locking critical equipment in secure closet can bean excellent security strategy findings establish that it is warranted. Guard Equipment:Keep critical systems separate from general systems: Prioritizeequipment based on its criticality and its role in processingsensitive information (see Chapter 2). Store it in secured areasbased on those priorities.House computer equipment wisely: Equipment should not be ableto be seen or reached from window and door openings, norshould it be housed near radiators, heating vents, airconditioners, or other duct work. Workstations that do notroutinely display sensitive information should always be stored inopen, visible spaces to prevent covert use.Protect cabling, plugs, and other wires from foot traffic: Trippingover loose wires is dangerous to both personnel and equipment.Keep a record of your equipment: Maintain up-to-date logs ofequipment manufacturers, models, and serial numbers in asecure location. Be sure to include a list of all attachedperipheral equipment. Consider videotaping the equipment(including close-up shots) as well. Such clear evidence ofownership can be helpful when dealing with insurancecompanies.Maintain and repair equipment: Have plans in place foremergency repair of critical equipment. Either have a technicianwho is trained to do repairs on staff or make arrangements withsomeone who has ready access to the site when repair work isneeded. If funds allow, consider setting up maintenancecontracts for your critical equipment. Local computer suppliersoften offer service contracts for equipment they sell, and manyworkstation and mainframe vendors also provide such services.Once you've set up the contract, be sure that contactinformation is kept readily available. Technical supporttelephone numbers, maintenance contract numbers, customeridentification numbers, equipment serial numbers, and mail-ininformation should be posted or kept in a log book near thesystem for easy reference. Remember that computer repairtechnicians may be in a position to access your confidentialinformation, so make sure that they know and follow yourpolicies regarding outside employees and contractors who accessyour system. Who needs a Maintenance Contract? 2ff7e9595c