But what if you could see issues coming and act before they cause real damage? That’s where network monitoring comes in.

In this article, you’ll see more examples that answer the question “Why is network monitoring important?” including specific industry examples of how network monitoring can keep your systems running smoothly.

What Is Network Monitoring?

Network monitoring gives you the key hints of when an outage might occur and, more importantly, how to prevent it.

Key Capabilities of Network Monitoring:

• Full visibility across hybrid and cloud-native setups.
• Automated, proactive alerts.
• Support for automation and self-healing systems.
• Centralized metrics, logs, and alerts.

Why is Network Monitoring Important?

Now that we understand what network monitoring does, let’s examine why it’s become essential for today’s IT operations. Here’s what tech leaders are looking at in today’s IT landscape, as well as how network monitoring addresses these challenges:

By implementing monitoring solutions, organizations can avoid costly downtime, gain visibility across complex environments, and maintain operational resilience.

Moving beyond theory, let’s see how real organizations put these monitoring principles into practice.

How Different Industries Use Network Monitoring

Organizations in every industry are using network monitoring to stay ahead:

Healthcare: Hospitals use log monitoring to maintain HIPAA compliance and keep patient systems online during updates or upgrades.

Aerospace: In aerospace, monitoring systems track spacecraft data to keep missions running smoothly, monitor flight systems to prevent crashes and equipment failures, and check engine health to fix problems before they cause delays.

Financial Services: High-volume transaction systems rely on monitoring and alerting to reduce fraud risk and performance lag.

With these industry applications in mind, choosing the right monitoring solution becomes crucial for achieving these results in your own environment.

Why Choose Nagios?

When selecting a network monitoring platform, you have several options to consider. Solutions like Nagios, SolarWinds, Datadog, Zabbix, and many others.

Why Nagios Stands Out:

• Proven Reliability: Nagios has a long-standing reputation for stability. When your monitoring can’t go down, you need something proven.

• Modern Features: Recent updates in Nagios XI 2024R2 include predictive alerting, REST APIs, log correlation, and hybrid environment support.

• Flexibility that Scales: Custom plugins, community extensions, and integrations with tools like Prometheus, Zabbix, Elasticsearch, and ServiceNow, which help build exactly what you need for your unique environment.

• Industry Trust: Used by leading organizations across aerospace, healthcare, finance, and government sectors for mission-critical monitoring.

• Cost-Effective Growth: Architecture that grows with your needs, avoiding high licensing fees.

Moving Forward

Outages and downtime are just some of the impacts of not having a proactive approach to network monitoring. Good monitoring doesn’t just alert you to problems; it helps you understand your environment. That way you can figure out where to focus your efforts, like spotting which systems are about to give you trouble or finding the best places to automate those repetitive tasks that eat up your day.

If you’re looking to improve your monitoring approach, there are a few ways to explore what’s possible. You could test Nagios XI in your own environment or schedule a demo with a Nagios expert about your specific challenges. And if you’re still asking yourself, “Why is network monitoring important?” and want to see more examples, review how other organizations have approached similar IT problems to see the real-world impact and stories.

Over 60% of ransomware attacks in 2024 utilized zero-day exploits, resulting in damages worth billions of dollars. Cybercrime is estimated to cost the world USD 10.5 trillion by 2025, according to Cybersecurity Ventures.

Let us look at why zero-days are dangerous, how zero-day exploits are found, the most significant incidents around the world, what we will see in 2025, and what you can do to combat zero-days with a good response plan.

Why Zero-Days are a Big Problem

A zero-day exploit targets a vulnerability in software, hardware, or firmware before the vendor or the security community knows of it. The attacker can exploit these vulnerabilities to steal data, deploy ransomware, or disrupt a service without anyone initially being aware of it. There is no patch or signature for a defense at the moment an organization becomes aware of a zero-day exploit; there is simply no time to defend against the attack vector.

How Zero-Days are Found

Fuzz Testing: Automated Vulnerability Search

Fuzz testing involves the user inputting random or malformed data into an application, then checking for unexpected behaviors (such as crashing) that often indicate a bug is present underlying the unexpected behavior. Modern fuzzers, such as AFL++ and Google’s OSS-Fuzz, employ techniques that leverage coverage-guided and AI-assisted risk-aware code coverage approaches, ultimately identifying higher-risk paths in code. OSS-Fuzz, since its inception, has identified over 8,000 critical bugs in open-source projects (Google Security Blog, 2024). Once fuzzing has been integrated into a CI/CD pipeline, it provides teams with the opportunity to discover potential vulnerabilities and prevent them during the development process.

Bug Bounty Programs: Paying the Hackers to Help Us

Bug bounty programs allow organizations to provide incentives to external researchers to discover and disclose defects to the researcher’s specifications. Platforms such as HackerOne or Bugcrowd help facilitate these relationships between organizations and ethical hackers. In 2024, Google paid out over $10 million to successful vulnerability rewards, demonstrating the proactive nature of these discovery programs. Well-designed bug bounty programs can reduce the chances of zero days being sold to the black market.

The Biggest Zero-Day Attacks in History

Stuxnet (2010): This worm exploited four chained Windows zero-days (CVE-2010-2568) that enabled it to bypass multiple layers of security and gain control of SCADA systems, ultimately sabotaging the Iranian nuclear program. Stuxnet proved that isolating critical systems and keeping industrial technology current are requirements, not negotiable.

EternalBlue (2017): A stolen exploit from the NSA (CVE-2017-0144) that took advantage of a Windows exploit helped spawn the WannaCry and NotPetya ransomware attacks that locked out over 300,000 systems worldwide. A lesson learned that delaying patching creates risk.

Log4Shell (2021): A zero-day flaw in Apache Log4j (CVE-2021-44228) was exploited, allowing attackers to remotely execute their code on impacted cloud-based systems and enterprise applications. This incident highlighted the importance of Software Bill of Materials (SBOM) tools to help track our third-party open-source components.

MOVEit (2023):The SQL injection zero-day (CVE-2023-34362) in MOVEit Transfer helped the CL0P gang easily steal an unknown amount of data from over 2,700 organizations and provided insight into our vulnerabilities through the supply chain

What’s Coming in 2025

Cybercriminals are not going to surrender, and zero-days are evolving quickly. The implications include:

• Artificial Intelligence Attacks: Hackers are employing AI-powered fuzzers to identify vulnerabilities quicker than before, and they are increasingly simulating real-world traffic so they can infiltrate your defenses.
• Dark Web Purchases: Zero-day exploits are now being sold on dark-web markets as subscriptions, with costs ranging from $100,000 to $10,000,000.
• Ransomware’s Next Step: Ransomware groups are also buying zero-days to get into systems, which makes the attacks targeted and even more lethal.
• Internet of Things Vulnerabilities: With estimates that by 2025 there will be over 20 billion things connected to the Internet, there are plenty of unpatched firmware vulnerabilities in smart cities and smart factories.
• Cloud Environments Vulnerabilities: Unprotected organizations’ misconfigured cloud environments, in particular Kubernetes, are now a prime target for zero-days.

Fighting Back: A Zero-Day Response Plan

Utilizing the NIST “Incident Response Life Cycle” (SP 800-61R2), here is a strategic plan for dealing with a zero-day:

Remain Ahead of the Game with Threat Intel

• Watch Feeds: Monitor CISA’s Known Exploited Vulnerabilities list, MITRE ATT&CK, etc., and tools like Recorded Future to glean insight on early threat detection.
• JOIN ISACs: Join an Information Sharing and Analysis Center for your specific industry to gather real-time attack data and countermeasures, and then immediately do something with it.

Virtual Patching: Buying Time

When a vendor patch isn’t ready, use these workarounds:

Best Practices to Take on

• Spot It: Use tools like Nagios to identify troubling behavior and determine the impacted systems.
• Contain It: Block infected endpoints/services or turn off vulnerable services.
• Fix It: Deploy patches or temporary fixes and/or restore clean systems from backups.
• Clean It Up: Look for hidden threats or ways hackers may return.
• Learn from It: Reconfigure your defenses and test more code to mitigate future attacks.

Using Nagios to Stay Safe from Zero-Days

Nagios XI is a powerful tool that helps keep your systems safe by monitoring for any unusual activity in your network, such as unexpected spikes in data or changes in your apps. It monitors everything from your servers to your applications, quickly spotting signs of a zero-day attack. With quick alerts, Nagios XI lets you act fast to stop problems before they grow into bigger issues. Nagios XI also works in offline setups, keeping your systems less exposed.

Wrapping Up

Zero-day exploits present a significant challenge, and it should be acknowledged that attackers have the advantage on a zero-day. However, with some proactive measures, the advantage can shift from attackers to defenders. By incorporating fuzzing during development, engaging ethical hackers, and properly conducting a response plan, organizations can reduce their risks posed by zero-days. By continually testing and improving their defenses, organizations can stay ahead of the ever-evolving threat landscape.

Glossary

• eBPF: A Linux tool for monitoring system behavior in real time.
• JNDI: A Java interface exploited in Log4Shell attacks.
• SBOM: A list of all software components to track vulnerabilities.
• Fuzzing: A testing technique that inputs random or malformed data to uncover software vulnerabilities.
• Virtual Patching: Temporary security measures to block exploits until vendor patches are available.

In December 2020, hackers slipped malicious updates into SolarWinds’ Orion platform, hitting over 18,000 organizations with data breaches and ransomware attacks. A year later, the Log4j vulnerability put millions of systems at risk with just one line of Java code. A 2022 Security Magazine report says software quality issues cost the U.S. economy $2.41 trillion.

This article breaks down the risks of third-party software, explains what to look for, and shares practical steps to keep your systems secure.

Why Third-Party Software Risks Matter

Third-party software, including open-source libraries, commercial packages, and cloud services, is essential to modern applications but introduces significant vulnerabilities. Weaknesses in these components can lead to data breaches, operational disruptions, or regulatory penalties under standards like the General Data Protection Regulation (GDPR) or the California Consumer Privacy Act (CCPA). A 2023 Cybersecurity Ventures report noted that supply-chain attacks are a growing threat, with third-party software as a primary attack vector. By proactively managing these risks, businesses can safeguard their systems and maintain trust.

Steps to Assess and Mitigate Risks

1. Map Your Software Ecosystem

You can’t protect what you don’t know about. Start by listing all the software your applications use.

Make a Software Bill of Materials (SBOM) to track everything from open-source libraries to commercial tools and cloud services like APIs or SaaS platforms. Tools like CycloneDX or System Package Data Exchange (SPDX) create clear visuals of how your software connects, including hidden dependencies. Check this list every three months to catch any changes.

Benefit: Helps you see all the software you rely on.

2. Evaluate Risk Factors

Look closely at your software to find risks that could cause trouble.

Examine how often open-source projects are updated and who’s working on them using platforms like GitHub or GitLab. Active projects with many contributors are usually safer. Use the National Vulnerability Database (NVD) to check for known issues and their severity. Make sure software licenses, like General Public License (GPL) or Massachusetts Institute of Technology (MIT), won’t cause legal problems, using tools like FOSSA to verify.

Benefit: Pinpoints risky software so you can act fast.

3. Leverage Automated Scanning Tools

Integrate Software Composition Analysis (SCA) into your continuous integration/continuous deployment (CI/CD) pipeline for early detection.

Use tools like the Open Worldwide Application Security Project (OWASP) Dependency-Check to scan for known vulnerabilities or Snyk for real-time alerts and remediation guidance. Run scans on each pull request via GitHub Actions or Jenkins, adjusting severity thresholds to minimize false positives.

Benefit: Detects issues before they reach production.

4. Conduct Manual Reviews

Manual reviews complement automation for deeper insights.

Verify cryptographic signatures, such as GPG or Secure Hash Algorithms (SHA), for software binaries and updates to prevent tampering. Review open-source project commit histories for suspicious activity, such as unverified contributors or sudden contribution spikes.

Benefit: Uncovers risks that automated tools may miss.

5. Assess Vendor Security

Not all software or cloud services are built with security in mind.

Ask vendors about their security practices using questionnaires like Standardized Information Gathering (SIG) or the Cloud Security Alliance’s Consensus Assessment Initiative Questionnaire (CSA CAIQ), focusing on encryption, incident response, and access controls. Check for certifications like System and Organization Controls (SOC) 2 or information security standard (ISO) 27001, and look for weaknesses, like poor authentication. Review vendors yearly or after any security issues.

Benefit: Makes sure your vendors meet high security standards.

6. Prioritize and Remediate Risks

Not all vulnerabilities are equal. Sort them by how serious they are.

Focus on critical issues with high Common Vulnerability Scoring System (CVSS) scores (above 8.0) in widely used software that hackers already know how to exploit. Tackle moderate issues (CVSS 4.0–7.9) in less critical systems next. Ignore minor issues with no known exploits unless they’re easy to fix. You can patch problems, swap risky software for safer options like Simple Logging Facade for Java (SLF4J) instead of Logging for Java (Log4j), or isolate weak components using network separation or tools like Docker.

Benefit: Saves time by tackling the most dangerous threats first.

7. Implement Continuous Monitoring

Ongoing vigilance is essential to manage dynamic supply chain risks.

Sign up for vendor security alerts and Common Vulnerabilities and Exposure (CVE) updates through tools like Snyk or Black Duck. Use zero-trust principles to check every piece of software regularly. Try AI-powered tools like Synopsys Polaris to spot unusual patterns in software vulnerabilities.

Benefit: Maintains security in an evolving threat landscape.

Risk Assessment Checklist

Final Thoughts

Third-party software can expose your business to serious risks, but you can tackle them with the right steps: map your software, check for vulnerabilities, use automated tools, do manual reviews, review vendors, prioritize fixes, and keep monitoring for threats.

In today’s connected world, cyberattacks are inevitable. Take action now to strengthen your defenses and stay ahead of threats.

1. Experience Frequent Network Outages

If your team regularly experiences network disconnections or unexplained outages, network monitoring is necessary. Frequently, these issues are caused by failed hardware, configuration problems, or capacity limitations. Without monitoring, you’re stuck guessing the problem that could have been caught early.

With no monitoring solution, you’re stuck in reactive mode. You might rush to resolve problems as they arise, but operations and users have already been impacted. The damage has already been done.

Think about it this way: every minute your network is down, your team isn’t just waiting around; they’re losing momentum, missing deadlines, and getting frustrated. Network monitoring transforms you from an emergency firefighter into a prevention specialist. Enabling you to be proactive and catch issues before they impact your operations.  

2. Complaints of Slow Performance

Do employees complain about slow emails, delayed file transfers, or extremely long loading times? Slow networks don’t just cause an inconvenience to your team and customers; they kill momentum and can even drain team morale. 

The real culprits behind slow performance:

• Bandwidth bottlenecks during peak usage.
• Network latency issues affecting cloud applications.
• Packet loss is causing delays.
• Overloaded network segments are struggling to keep up.

Network monitoring provides the data needed to pinpoint exactly what’s causing the slow performance. More importantly, you can predict trends that help with network growth and sustainability, preventing any slowdowns in the future.  

3. Blind Spots in Network Security

In today’s landscape, networks are under constant security challenges. Not knowing what is happening behind the scenes is like leaving your front door wide open to cybercriminals.

Network monitoring gives you the visibility to spot these security threats as soon as they happen, not after the damage is already done.

For compliance-heavy industries: Custom reports and tailored queries make passing security audits much easier. No more scrambling to prove you’re meeting requirements; the data is right there for you.

4. Growth Feels Like a Constant Emergency

Growing businesses often experience network performance issues when adding new users, devices, or applications. Without understanding current network capacity, every expansion can feel like a gamble.

Here’s the thing: network monitoring provides the historical data and trend analysis you need to make smart growth decisions. Instead of reactive emergency fixes, you can plan proactively and ensure your network scales with your business.

5. You Can’t Answer Basic Questions About Your Network

If someone walked into your office right now and asked about your network’s current state, could you give them concrete answers? If you’re stuck with responses like “I think it’s fine” or “probably okay,” you’re running your business blindly. Lack of visibility makes it impossible to optimize your network resources, troubleshoot issues, or demonstrate network reliability.

If you answered “I don’t know” to any of these questions, that likely means you’re making decisions off guesswork, not data. Network monitoring can transform this uncertainty into actionable insights.

The Cost of Waiting

Delaying network monitoring implementation often results in:

• Increased downtime: Every outage costs money, productivity, and customer trust. The longer you wait, the more expensive solutions become.
• Reduced productivity: Slow networks don’t just frustrate employees and diminish their productivity; they reduce business output and customer trust.
• Security vulnerabilities: Threats you can’t see are threats that you can’t stop.
• Higher Costs: Emergency fixes and reactive solutions are always more expensive than planning ahead.
• Poor Decision Making: Without data, you’re blindly making important infrastructure decisions.

Taking Action

Recognizing these signs is the first step toward transforming your network from a source of frustration into a competitive advantage. The earlier you address these issues, the more you can minimize their impact on your business operations and team morale.

Why Nagios?

Nagios provides comprehensive network monitoring solutions that address all these warning signs. The Nagios suite offers the visibility and proactive capabilities you need to transform your infrastructure from reactive firefighting to strategic network management.

Whether you’re dealing with frequent outages, slow performance, security blind spots, growth challenges, or simply need better visibility, Nagios has the tools to help you get back in control.

Ready to stop guessing what is causing your network issues and start taking control of your environment? Learn more about how Nagios can help your business at www.nagios.com/products.

This guide will take you through key network monitoring insights and point you to the right Nagios documentation and video tutorials to help you obtain them.

Whether you’re monitoring, troubleshooting, or staying ahead of potential issues, you’ll find the tools and resources here:

The High Cost of Downtime: Why Predictive Monitoring Is Now Essential

Imagine if your IT system could warn you about issues before they turn into big problems. That’s what predictive analytics helps you do. Predictive analytics will analyze data trends to spot warning signs early, giving you a head start on fixing issues.

How Nagios Helps:

Nagios XI uses smart alerting that prioritizes the most critical issues, looking at historical data to help predict future outages and IT problems. With the right alerts in place, your team can focus on fixing real issues instead of getting bogged down by false alarms or minor glitches. Predictive analytics can also be used for capacity planning.

➤ Resources to Implement:

Navigating Complexity: Monitoring Across Hybrid and Multi-Cloud Environments

Many companies today have a mix of cloud services and local servers. Without a single view, it’s easy to miss outages or slowdowns.

How Nagios Helps:

Nagios XI gives you one dashboard to monitor everything. Physical servers, cloud platforms, network gear, and others. With a single customizable dashboard, you get a complete picture and can catch issues before they become big problems.

➤ The Nagios Documentation to Implement:

Bridging the Gap: Why IT Teams Combine Prometheus with Nagios

Many teams use Prometheus to gather metrics, but they still rely on Nagios for alerts and infrastructure checks. Merging these capabilities helps eliminate blind spots and simplifies monitoring across your entire environment.

How Nagios Helps:

Thanks to Nagios XI’s new Prometheus Monitoring Wizard, you can easily pull metrics from Prometheus into Nagios. No complicated scripts needed. Just click, set up with the wizard, and start monitoring.

➤ The Nagios Documentation to Implement:

Observability Without the Noise: Accelerating Troubleshooting at Scale

Looking at logs or metrics alone can slow you down. When you bring logs and performance data together, troubleshooting becomes much easier.

How Nagios Helps:

Nagios Log Server works hand-in-hand with Nagios XI to bring logs and metrics into one place. Finding the root cause is quicker and easier.

➤ The Nagios Documentation to Implement:

Self-Healing Infrastructure: Meeting the Demands of Always-On IT

Manual fixes can take a lot of time. Automation allows your systems to react instantly when problems happen, reducing downtime.

How Nagios Helps:

Nagios XI’s event handlers can run scripts automatically when issues are detected, helping your environment heal itself without waiting for someone to step in.

➤ The Nagios Documentation to Implement:

Stay Ahead with Nagios

Keeping your IT environment resilient, efficient, and secure might seem difficult, but with the right tools and guidance, it can be simplified. Nagios documentation provides all the resources you need to implement smarter monitoring strategies, from predictive analytics and automation to capacity planning and alerting.

Have questions or want to see it in action? We’re here to help! Contact sales@nagios.com or book a demo.

Extra Tip: Finding the Right Nagios Documentation

We recently revamped the Nagios Documentation page to make it easier for you to find exactly what you need. First, select your solution or project, then use filters to access the most relevant guides, videos, and docs.

If you don’t find what you need there, check out Nagios Support.

Nagios Documentation & Guides

➤ We recently revamped all of our documentation, providing you with accurate, easy-to-understand instructions and helpful tips for using Nagios. These Nagios docs will guide you through the basics, help you get started, and support you in learning more about Nagios tools.

Nagios Documentation

A new comprehensive documentation site replacing the legacy Support Knowledgebase. Here, you’ll find guides for commercial solutions and open-source projects with step-by-step tutorials, technical documentation, and best practices.

Nagios Library

Library is a central place for detailed Nagios training docs, how-to guides, articles on the latest industry insights, and real-life stories about using Nagios:

Admin Guides

Looking for step-by-step instructions? These guides walk you through installation, configuration, and advanced setup:

Nagios Support Options

➤ Support options are designed to provide both quick answers and in-depth assistance. Nagios offers these resources with every license.

Nagios Customer Success Managers

If you have a Nagios license, you can contact a Nagios Customer Success Manager (CSM). CSMs can help with a wide variety of Nagios-related information. They can help answer basic questions about Nagios, get you in contact with the right support, as well as help you renew or buy a new license.

To contact a Nagios CSM, email csm@nagios.com.

Nagios Support Plans

Guaranteed one-business-day response from Nagios Technicians for support tickets (up to 10 per year), with the option to purchase additional support plans as needed:

Nagios Answer Hub

Find answers to frequently asked questions and product-specific help:

Nagios Support Website

The Nagios Support makes it easy to find what you need, with quick access to the Knowledge Base, Library, Support Forum, and product-specific resource pages:

Nagios Video Resources

➤ Prefer to learn visually? Our video resources walk through installation, setup, Nagios training, and more.

Nagios YouTube Channel

Explore our video tutorials, product demos, and best practices all in one place:

Nagios Webinars

Want deeper insights? Nagios Webinars offer regular sessions covering best practices, use cases, and expert tips:

Nagios Community Resources

➤ Access years of collective experience, along with support options and answers to common questions.

Nagios Support Forum

The Nagios Support Forum is an ideal place to get quick answers to “how-to” questions. Ask questions, find answers, and contribute to active discussions:

Nagios Exchange

Browse thousands of community-created plugins, add-ons, and integrations, or share your own projects with the Nagios Community.

Where to Go Next

➤ If you’re still looking for more resources, Nagios offers free one-on-one sessions with a Nagios Technician—plus free trials to help you get started.

Personalized Demo

See Nagios in action, explore key features, and discover how Nagios fits your infrastructure:

Download a Free Trial

Get a free, 30-day trial of any Nagios Enterprise Solution to try it out yourself:

Quickstart Session

Get your instance up and running, discuss your environment, and receive tailored configuration help:

There’s no single way to get started with Nagios. Some like to dig into the documentation, while others prefer more hands-on Nagios training, such as a product walkthrough or demo. However you like to learn, there’s a resource to match your style.

Have Questions? Reach Out to Us

Reach out anytime to sales@nagios.com if you have questions or need support. We’re here to help you get the most out of Nagios.

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