8 Network Vulnerability Scanner for Small to Enterprise Business

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Find vulnerabilities in your network infrastructure before anyone else. Having network infrastructure vulnerable to known or unknown risk is dangerous. But the question is, how do you find out the threats? _Note_: this is not about finding vulnerabilities in a website that I [explained here]( It‘s about **core infrastructure**.

The latest report by edgescan shows 81% of vulnerabilities found in the network.

edgescan vulnerability report

There are many scanners, and not all fit the requirement. Here are some of them which look suitable for small to enterprise-level of business.


Intruder is a proactive vulnerability scanner that scans you as soon as new vulnerabilities are discovered.

Intruder dashboard

Designed for external-facing systems, Intruder detects over 10,000 security weaknesses, including WannaCry, Heartbleed, and SQL Injection, and helps to reduce your attack surface by highlighting ports and services which should not be exposed to the internet.

Intruder vulnerability scanner

Other unique features include AWS and Slack integration, which allows Intruder to keep track of what systems you have facing the internet and notify you when new vulnerabilities are discovered. Integration with Jira means new issues can be sent straight to your development team.

Intruder is popular with startups and medium-sized businesses because it makes vulnerability management easy for small teams.

Intruder offers a 14-day free trial so that you can see all the features in action yourself.

HostedScan Security

HostedScan Security provides a powerful and comprehensive set of vulnerability scans for network, servers, web applications, and IT assets.

With HostedScan, you can run vulnerability scans for all of your external systems. HostedScan offers a network vulnerability scan powered by OpenVAS, the industry-leading open-source network scanner. Additionally, HostedScan provides a TCP port scan, a UDP port scan, and a web application scan to find issues such as SQL injection and cross-site scripting.

HostedScan network vulnerability scan

HostedScan has dashboards, reports, and vulnerability risk management features to help you summarize your security posture and map your attack surface area. You can invite your team members to the account, set up scheduled scans for continuous security monitoring, and use APIs + webhooks to integrate the vulnerability scans into your own processes and applications.

The flexible and affordable pricing plans make it a popular choice for small and medium-sized businesses as well as IT contractors and managed security service providers (MSSPs).

HostedScan Security has a free tier that you can use to try the product before purchasing.

AlienVault USM

Now AT&T, AlientVault USM (Unified Security Management) is an enterprise-ready solution for on-prem or cloud infrastructure.

AlienVault USM dashboard

USM is available as SaaS, which means you don’t have to worry about software installation and setting them up. You can get it started in minutes to scan the entire infrastructure. It supports the major cloud like Azure and AWS.

Along with network vulnerability scan, it also helps with asset discovery, behavioral monitoring, intrusion detection, event, and log management. With their beautiful dashboard, you can get your infrastructure security posture and let you drill-down to a detailed view to understand and mitigate the risks.

For compliance, there are pre-made reports templates such as PCI-DSS, NIST CSF, HIPPA, ISO 27001 available for you. AlienVault integrates well with cloud-based security products (Cloudflare, SOPHOS, ServiceNow, Google Workspace, Cisco Umbrella, Okta, McAfee EPO, etc.) and got more than 350 plugins.


An award-winning Nexpose vulnerability scanner inspires InsightVM by Rapid7. InsightVM is live vulnerability management and endpoint analytics.

With the help of InsightVM, you can collect, monitor, and analyze the risk for new and existing networks.

InsightVM dashboard

Some of the features are:

Powerful analytics – get advanced threat exposure analytics with actionable information on risks for faster remediation.

Continuous monitoring – insight agent automatically and continuously monitor endpoint for vulnerability and provide live monitoring. It offers dynamic monitoring for AWS, VMware, Azure.

Liveaboards – a clickable dashboard with real-time data for CISO to the system administrator to analyze infrastructure security.

Risk scores – vulnerabilities are tagged with the standard CVSS rating so you can take action on priority.

Integration – Integrate with your favorite tools, including Metaspoilt, InsightIDR, Nexpose, ServiceNow, McAfee, Splunk, etc.

You can get it started with a FREE trial for 30 days to experience InsightVM.


Acunetix network scanner test network perimeter for more than 50,000 known vulnerabilities and misconfiguration.

Acunetix leverage OpenVAS scanner to provide a comprehensive network security scan. It‘s an online scanner, so scan results are available on the dashboard where you can drill-down the report, risk, threats.

Acunetix dashboard

Risk items are associated with the standard threat score and actionable information, so it’s easy for you to remediate.

Some of the following checks are done.

  • Security assessment for routers, firewall, load balancers, switches, etc
  • Audit weak password on network services
  • Test DNS vulnerabilities and attacks
  • Check misconfiguration of a proxy server, TLS/SSL ciphers, web servers.

Acunetix offers 14 days trial, so give a try to see how it works.


One of the famous open-source vulnerability scanning and management solutions.

OpenVAS is a framework which includes many services and tools and makes perfect for network vulnerability test.

OpenVAS dashboard

Take a look at their demo to know how does it look like. It‘s open-source, so it’s free; however, they do have enterprise support.


Nessus is one of the popular vulnerabilities management, used by millions of users. It covers a large number of asset types.

  • Operating system
  • Hypervisors
  • Network devices
  • Database
  • Web servers
  • Firewall

Nessus is fast in discovering and got high-accuracy with low false positives.

Nessus dashboard

Some of the great features of Nessus by Tenable are:

  • Detailed reporting
  • Reports can be automated to download using an API
  • Compliance & sensitive content auditing ready.
  • Capable of scanning IPv4/IPv6 and hybrid networks
  • Deploy as software or virtual appliances
  • Available on-premises or in the cloud
  • A risk score based on CVSS

More than 24,000 organizations trust Nessus. They offer a FREE trial for seven days.

Geekflare users get a 10% off on purchase of Nessus products. Use coupon code SAVE10.


Protect your data center and networks with Qualys.

Qualys offers a suite of security products to guard the entire infrastructure. With the help of continuous monitoring, you can monitor your network and get alerted in real-time for threats and system change.

Qualys continuous monitoring

And with the help of the vulnerability management application, you can discover, detect, and protect the devices.

Qualys vulnerability management

You can get it started with the trial to experience it.


Managing network vulnerabilities are challenging, and I hope the above solutions help you to keep your infrastructure secure.


Written by Alexis Kestler

A female web designer and programmer - Now is a 36-year IT professional with over 15 years of experience living in NorCal. I enjoy keeping my feet wet in the world of technology through reading, working, and researching topics that pique my interest.