{"id":3243,"date":"2025-05-20T15:12:54","date_gmt":"2025-05-20T15:12:54","guid":{"rendered":"https:\/\/cybersecurityinfocus.com\/?p=3243"},"modified":"2025-05-20T15:12:54","modified_gmt":"2025-05-20T15:12:54","slug":"a-guide-to-perimeter-defense-in-modern-networks","status":"publish","type":"post","link":"https:\/\/cybersecurityinfocus.com\/?p=3243","title":{"rendered":"A Guide to Perimeter Defense in Modern Networks"},"content":{"rendered":"
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Organizations can\u2019t run without digital systems and connected technologies in today\u2019s fast-moving world. This digital adoption opens new doors for cyber threats as well. Hackers are becoming more advanced and finding new ways to attack organizations\u2019 IT systems to steal sensitive data, disrupt their operations, and harm brand credibility.<\/span>\u00a0<\/span><\/p>\n

Hence, cybersecurity is no longer a concern to handle; it has become a mandatory and necessary step companies need to take to protect their digital environment and set boundaries for their internal systems from the perilous external environment. That\u2019s where the importance of perimeter security and defense comes in..<\/span>\u00a0<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Understanding Perimeter Defense<\/h2>\n<\/div>\n<\/div>\n
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Perimeter defense refers to the strategies and solutions used to protect the connecting points of a secure network perimeter from its outer environment.\u00a0<\/span>\u00a0<\/span><\/p>\n

Traditionally, organizations have relied on firewalls and intrusion detection systems for perimeter defense, but rising modern changes like remote work and cloud computing demand a more layered and advanced approach to perimeter defense to protect multiple connecting points in sophisticated environments.<\/span><\/p>\n<\/div>\n<\/div>\n

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Why It Matters<\/h3>\n<\/div>\n<\/div>\n
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Perimeter defense acts as the first layer of protection, filtering out harmful traffic before it reaches your trusted internal network.<\/span>\u00a0<\/span><\/p>\n

By acting as a barrier at the gate, it blocks everything from unauthorized access to malware and other malicious attempts.<\/span>\u00a0<\/span><\/p>\n

Common risks it helps to protect against include:<\/span>\u00a0<\/span><\/p>\n

Hackers trying to break in<\/span>\u00a0<\/span>Malicious software attempting to spread<\/span>\u00a0<\/span>Attackers scanning for weak points<\/span>\u00a0<\/span><\/p>\n

It also helps meet data protection rules by controlling who can access data and where it can be sent. This helps keep business operations stable and secure.<\/span>\u00a0<\/span><\/p>\n

When done right, it helps to:<\/span>\u00a0<\/span><\/p>\n

Reduce downtime<\/span>\u00a0<\/span>Protect customer trust<\/span>\u00a0<\/span>Support overall digital hygiene<\/span>\u00a0<\/span>\t\t\t\t\t\t<\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Core Components of Network Perimeter Defense<\/h2>\n<\/div>\n<\/div>\n
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The core components of network perimeter defense can be grouped into two categories:<\/span>\u00a0<\/span><\/p>\n

Traditional components<\/span> Modern enhancements<\/span>\t\t\t\t\t\t<\/p><\/div>\n<\/div>\n

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Traditional Components<\/h3>\n<\/div>\n<\/div>\n
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These are the widely used tools and the backbone of perimeter defense. Even though they are traditional, they are still useful and relevant if used properly and updated regularly.<\/span>\u00a0<\/span><\/p>\n

Check the main traditional components:<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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\t\t\t\t\tToolWhat It DoesHow It Helps\t\t\t\t<\/p>\n

\t\t\t\t\tFirewalls (Stateless & Stateful) Act as digital gatekeepers by inspecting network traffic.Stateless firewalls look at individual packets; stateful firewalls monitor active connections. Stateful firewalls are smarter and can detect suspicious behavior more accurately.Intrusion Detection Systems (IDS)They act like security cameras for your network, monitoring traffic and alerting you to unusual or dangerous activity.Warns you of potential breaches or scans before damage occurs.Intrusion Prevention Systems (IPS)Go beyond IDS by actively blocking external threats or shutting down malicious connections in real-time.Stops attacks before they can harm your internal network. Virtual Private Networks (VPNs) Create secure, encrypted tunnels for remote users. Protects sensitive data from being intercepted, especially by remote employees.Routing and NAT\/DHCPDirects data properly across the network. NAT hides internal IPs, while DHCP assigns IPs and can control network access.Adds obscurity and control, helping prevent unauthorized access and manage traffic flow.Traffic ShapingManages bandwidth by prioritizing safe\/critical traffic and limiting risky or unnecessary data.Keeps essential services running smoothly and prevents network slowdowns caused by high-risk traffic.\t\t\t\t<\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Modern Enhancements<\/h3>\n<\/div>\n<\/div>\n
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Since threats are growing and getting <\/span>more and more<\/span> advanced, perimeter <\/span>defenses<\/span> also have had to evolve. The below modern security measures fill the gap left by traditional tools and help organizations overcome new, rising challenges in the threat landscape, <\/span>mainly in<\/span> cloud-connected and remote-friendly environments<\/span>.<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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\t\t\t\t\tToolWhat It Does How It Helps\t\t\t\t<\/p>\n

\t\t\t\t\tAdvanced Malware Protection (AMP) Goes beyond detecting known viruses by analyzing file and software behavior. Flags suspicious changes even after download.Detects threats missed during initial scans by observing unusual behavior.Anti-Spam and Email Gateways Blocks harmful or suspicious emails before they reach users.Helps prevent phishing, ransomware, and other email-based attacks.Application Control Allows organizations to manage which applications can or cannot run on their networks.Prevents unauthorized or dangerous apps from running and introducing vulnerabilities.URL, DNS, and Video Filtering Restricts access to dangerous websites, content, or streaming sources.Blocks fake or infected sites and helps manage internet usage. Zero Trust Network Access (ZTNA) Requires users to verify their identity before gaining access, regardless of their location.Ensures access is granted only when necessary and only to verified users, reducing internal threat risk. \t\t\t\t<\/p><\/div>\n<\/div>\n

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Both old and new components can work best when they are layered properly together with a strong strategy that is built according to the business needs<\/span>.<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Perimeter Security in Hybrid and Decentralized Networks<\/h2>\n<\/div>\n<\/div>\n
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Since today\u2019s businesses are spread out, employees work remotely using laptops, and companies store data and run apps in the cloud, the idea of a clear network boundary doesn\u2019t exist anymore.<\/span>\u00a0<\/span><\/p>\n

This leaves network security at more risk than ever. Remote workers, third-party apps, and cloud platforms create many new ways for attackers to try to get in, with so many access points. This makes it hard to track who\u2019s entering and leaving, raising the risk of unauthorized access.<\/span>\u00a0<\/span><\/p>\n

To handle this new reality, companies need to adopt more advanced security solutions, including:<\/span><\/p>\n<\/div>\n<\/div>\n

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Cloud-Based Firewalls and Security Gateways<\/h3>\n

These tools work in the cloud, not in the office building, securing the entire environment regardless of location. They check and control internet traffic no matter where users are located, helping secure remote work and cloud use.<\/p>\n<\/div>\n

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Secure Access Service Edge (SASE) <\/h3>\n

SASE is a cloud-based service that combines security and networking. It protects users no matter where they are\u2014at home, in the office, or traveling. And it applies the same security rules to all devices and locations. <\/p>\n<\/div>\n

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Software-Defined Perimeter (SDP) <\/h3>\n

SDP gives users access only to the specific systems they need, instead of the whole network. This keeps the rest of the system hidden from attackers, even if they get in.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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In the current hybrid and remote world, thinking of security as a single wall around your network <\/span>doesn\u2019t<\/span> work anymore. Hence, always adopt modern approaches to cope with cyberattacks against your network, systems, and data.<\/span><\/span>\u00a0<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Network Perimeter vs. Network Edge<\/h2>\n<\/div>\n<\/div>\n
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Both the network perimeter and the network edge are important, and they serve different purposes in network security<\/span>. Check the comparison below<\/span>:<\/span><\/span>\u00a0<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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\t\t\t\t\tCategoryNetwork PerimeterNetwork Edge\t\t\t\t<\/p>\n

\t\t\t\t\tConcept The traditional boundary between internal systems and the outside world The point where users and devices actually connect to the network Location Often located at a central point, like a company\u2019s main data center or internet gateway Spread throughout the network\u2014could be in remote offices, cloud services, or mobile devices Security Focus Focused on blocking unauthorized access and filtering traffic at the \u201centrance\u201dFocused on visibility, control, and secure connectivity at the user or device levelTechnologies Involved Firewalls, intrusion detection\/prevention systems (IDS\/IPS), VPNs, NAT Switches, routers, wireless access points, software-defined networking, endpoint protection Adaptability May need to be extended or redefined for cloud and remote accessDesigned to be flexible and scalable in decentralized, hybrid environments \t\t\t\t<\/p><\/div>\n<\/div>\n

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As networks become more distributed and users more mobile, both the perimeter and the edge need to be part of a unified security strategy.<\/span><\/span>\u00a0<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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How Attackers Breach Perimeter Defenses<\/h2>\n<\/div>\n<\/div>\n
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Check the most common methods attackers use to break into the network perimeter <\/span>defense<\/span>.<\/span><\/p>\n<\/div>\n<\/div>\n

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Misconfigured Firewalls and Security Systems<\/h3>\n

A firewall or intrusion detection system (IDS) is only as good as its setup. If the rules aren\u2019t strict enough or if certain access points are left open unintentionally, attackers can slip through unnoticed. These missteps can create backdoors or expose sensitive areas that were supposed to be protected. <\/p>\n<\/div>\n

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Social Engineering and Phishing Attacks<\/h3>\n

Not all attacks start with a technical exploit. Sometimes, the easiest path is by tricking a person. Threat actors can send fake but convincing emails to trick employees into giving up passwords or clicking on malicious links. Once in, they can quietly explore the network without being noticed. <\/p>\n<\/div>\n

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Compromising Trusted Vendors or Third Parties<\/h3>\n

Organizations often have to work with outside suppliers and partners, and attackers know this well. By targeting these third parties, attackers can gain access to the network and bypass security checks. This is called a supply chain attack and is extremely dangerous, as it doesn’t execute the attack directly. <\/p>\n<\/div>\n

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Exploiting Zero-Day Vulnerabilities<\/h3>\n

A zero-day vulnerability is a security loophole in hardware or software that the organization doesn’t yet know about and has not fixed. Attackers can exploit this weakness and take advantage before the team fixes the systems. Stopping such highly targeted attacks is difficult using traditional perimeter tools. <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Best Practices for Strengthening Perimeter Defense<\/h2>\n<\/div>\n<\/div>\n
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Keeping your entire network secure requires a systematic and multi-layered approach. Check out the best practices to be followed for strengthening your perimeter <\/span>defense<\/span>:<\/span><\/p>\n<\/div>\n<\/div>\n

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Regular System and Signature Updates<\/h3>\n

Always ensure the security tools and solutions, and your security strategy, are up to date and stay one step ahead of threat attackers. Use advanced industry-best solutions to block unauthorized access to your network.<\/p>\n<\/div>\n

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Network Segmentation<\/h3>\n

Segmenting your large network into multiple parts will prevent spreading and damaging the entire network system, even if one segment is attacked.<\/p>\n<\/div>\n

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Implementing Layered Defense Strategies<\/h3>\n

Using multiple layers of security keeps the network safe even if one layer fails. For example, combining deception with network detection and response<\/a> makes it harder for attackers to break in. <\/p>\n<\/div>\n

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Continuous Monitoring and Logging <\/h3>\n

Continuously monitoring your network activities and logging activities will help you identify anomalies<\/a> right after they happen. This speeds up response actions before they cause critical damage. Detailed logs also help with investigation and compliance reporting. <\/p>\n<\/div>\n

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Security Awareness and Training<\/h3>\n

Every organization should provide cybersecurity awareness training. It helps employees recognize common threats like phishing emails and suspicious attachments. When they understand these risks, they\u2019re less likely to fall for attackers\u2019 tricks.<\/p>\n<\/div>\n

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Routine Vulnerability Assessments and Penetration Testing <\/h3>\n

Testing your network’s health and security posture at regular intervals helps identify potential vulnerabilities early.\n<\/p>\n

Vulnerability assessments scan your systems for security gaps.
\nPenetration testing simulates real-world attacks to check how well your defenses perform.
\nConducting these tests regularly helps keep your network secure and less vulnerable.\n\t\t\t\t\t\t<\/p><\/div>\n

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Adoption of Zero Trust Principles<\/h3>\n

The Zero Trust security model means no one is trusted by default, whether inside or outside the network. Every access request must be verified. This \u201cnever trust, always verify\u201d approach helps prevent data breaches, even if an attacker gets in.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tSuggested Reading: What Should a Company Do After a Data Breach?<\/a><\/span><\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Deception Technology for Enhancing Perimeter Defense<\/h2>\n<\/div>\n<\/div>\n
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Deception technology uses decoys, traps, and fake assets distributed across the network, acting as an alarm system to detect unauthorized activity<\/span>. These elements are designed to:<\/span><\/p>\n<\/div>\n<\/div>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tMislead attackers <\/span><\/p>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tDetect intrusions early<\/span><\/p><\/div>\n<\/div>\n

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Deceptive assets closely mimic real systems and data, luring attackers without exposing actual resources. When triggered, these traps provide:<\/span><\/span><\/p>\n<\/div>\n<\/div>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tHigh-fidelity alerts<\/span><\/p>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tValuable intelligence on attacker behavior and tactics<\/span><\/p><\/div>\n<\/div>\n

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Deception enhances security by:<\/span><\/span>\u00a0<\/span><\/p>\n<\/div>\n<\/div>\n

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\n\t\t\t\t\t\t\t\t\t\tCreating a hostile environment for attackers<\/span><\/p>\n

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\n\t\t\t\t\t\t\t\t\t\tReducing attacker dwell time within the network <\/span><\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Stay Ahead of Attackers with Fidelis Deception\u00ae<\/div>\n<\/div>\n<\/div>\n
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\t\t\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tTrap attackers with decoys and lures<\/span><\/p>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tDetect threats early and gain valuable insights <\/span><\/p>\n

\t\t\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tAutomatically map vulnerabilities and deploy decoys<\/span><\/p><\/div>\n<\/div>\n

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\n\t\t\t\t\t\t\t\t\tDownload the Datasheet <\/span>
\n\t\t\t\t\t<\/span>
\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Why Deception is Essential for Perimeter Defense<\/h2>\n<\/div>\n<\/div>\n
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Catches What Traditional Defenses Miss<\/h3>\n

Many modern threats, such as insider attacks or credential-based intrusions, can bypass firewalls and other perimeter defenses undetected. Deception can identify these threats from within the network.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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\n\t\t\t\t\t\t\t\t\t\tSuggested Reading: Deception vs. Traditional Threat Detection: A Detailed Comparison<\/a><\/span><\/p><\/div>\n<\/div>\n

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Low False Positives<\/h3>\n

Deception solutions work in a more advanced way than simply monitoring network traffic, as no legitimate user should ever interact with a decoy. Hence, the alerts are genuine and trustworthy.<\/p>\n<\/div>\n

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Supports Early Threat Detection<\/h3>\n

Deception can detect attackers in the early stages of reconnaissance or lateral movement, before they reach sensitive data or systems.<\/p>\n<\/div>\n

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Minimally Invasive Deployment<\/h3>\n

Deceptive elements can be layered into existing infrastructure without interrupting normal operations or requiring major changes to perimeter defense tools.<\/p>\n<\/div>\n

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Improves Incident Response<\/h3>\n

By capturing attacker activity in real time, deception tools provide context and intelligence that can speed up investigation and containment. <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tSuggested Reading: What Is Digital Forensics? Investigating Cyber Threats <\/a><\/span><\/p><\/div>\n<\/div>\n

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Deters Attackers<\/h3>\n

The knowledge that a network uses deception can itself act as a deterrent, making attackers second-guess their moves and increasing their risk of exposure. <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Enhance Perimeter Defense with Fidelis Deception\u00ae<\/h2>\n<\/div>\n<\/div>\n
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Fidelis Deception<\/a>\u00ae is an advanced cybersecurity solution designed to proactively detect and neutralize attackers. By deploying fake assets and decoy traps, it misleads attackers into revealing their tactics, providing early detection of threats.<\/span><\/p>\n<\/div>\n<\/div>\n

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Key features of Fidelis Deception\u00ae include:<\/h3>\n<\/div>\n<\/div>\n
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tFake Assets & Decoy Traps: Lures attackers into interacting with decoys, triggering alerts.<\/span><\/p>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tEarly Detection: Identifies attackers attempting credential theft or lateral movement.<\/span><\/p>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tLow False Positives: Only genuine threats are flagged, streamlining response.<\/span><\/p>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tSeamless Integration: Complements traditional perimeter defenses like firewalls and IDS. <\/span><\/p>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>
\n\t\t\t\t\t\t\t\t\t\tProactive Threat Mitigation: Shortens response times and minimizes the window for attackers. <\/span><\/p><\/div>\n<\/div>\n

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\n\t\t\t\t\t\t\tFidelis Deception\u00ae helps organizations detect threats in real time, cut down on false alarms, and strengthen their <\/span>defenses<\/span> more effectively<\/span>.<\/span>\t\t\t\t\t\t<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Frequently Ask Questions<\/h2>\n<\/div>\n<\/div>\n
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What is perimeter defense in network security?<\/h3>\n<\/div>\n
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Perimeter <\/span>defense<\/span> uses tools and strategies to guard the edges of your network. It blocks unwanted access and harmful traffic before they get in<\/span>.<\/span><\/p>\n<\/div><\/div>\n

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Why isn\u2019t a firewall alone enough for perimeter security?<\/h3>\n<\/div>\n
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Modern threats are advanced, and they can pass through firewalls. Hence, leaders must consider adding an extra layer of security, like a deception solution<\/span>.<\/span><\/p>\n<\/div><\/div>\n

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How does deception technology help with perimeter defense?<\/h3>\n<\/div>\n
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Deception technology uses decoys to trick attackers. When they interact with these fake systems, this triggers alerts and helps spot threats before <\/span>real harm<\/span> is done<\/span>.<\/span><\/p>\n<\/div><\/div>\n

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What\u2019s the difference between the network perimeter and network edge?<\/h3>\n<\/div>\n
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The network perimeter is like a security wall around your core systems. The network edge is where users and devices connect, such as remote workers or cloud services<\/span>.<\/span><\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

The post A Guide to Perimeter Defense in Modern Networks<\/a> appeared first on Fidelis Security<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

Organizations can\u2019t run without digital systems and connected technologies in today\u2019s fast-moving world. This digital adoption opens new doors for cyber threats as well. Hackers are becoming more advanced and finding new ways to attack organizations\u2019 IT systems to steal sensitive data, disrupt their operations, and harm brand credibility.\u00a0 Hence, cybersecurity is no longer a […]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-3243","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=\/wp\/v2\/posts\/3243"}],"collection":[{"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3243"}],"version-history":[{"count":0,"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=\/wp\/v2\/posts\/3243\/revisions"}],"wp:attachment":[{"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3243"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3243"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3243"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}