Network Vulnerability Scanner
Fast, accurate and free online network vulnerability scanner tool running directly in your browser.
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Network vulnerability scanner
Perform a quick, non-invasive scan of your network host for open ports and common services (SSH, HTTP, RDP, databases, etc.). Based on the detected services, you will receive a simplified risk assessment and a list of potentially vulnerable points. The tool is intended only for testing systems that you have permission to use.
No significant problems were detected based on the tests performed. This is a quick, superficial scan and does not replace a full security audit or a professional vulnerability scanner.
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Other tools you may find usefulNetwork Vulnerability Scanner online - check open ports and basic network vulnerabilities on your server
Network Vulnerability Scanner is a browser-based network security scanner that in a simple and understandable way checks which ports on your host are visible from the network, what services are probably running there and what general risk results from their availability, so in a few minutes you get a clear report that you can pass it on to your administrator, IT team, or keep it as a starting point for further strengthening the security of your infrastructure.
Instead of installing heavy applications or configuring complex tools, you simply enter the IP address or hostname of your server, select a scanning profile, or provide your own list of ports, click the button to launch Network Vulnerability Scanner, and the tool step by step checks the most popular network service ports, tries to recognize the type of website by the banner, and assigns it an overall risk level, so that even a non-technical person can understand which elements require more attention.
What exactly does Network Vulnerability Scanner check
Network Vulnerability Scanner combines a classic port scanner with a simple analysis of services and banners, focusing on what is actually visible from the network to your host, so in one report you get a list of open ports, default assignment of services, a description of the overall risk level and short tips that help you decide whether a given port should be opened to the world, limited to trusted addresses, or maybe completely disabled.
Network Scanner Key Features
- Host or IP address support, so you can scan both named servers and devices specified by numeric address.
- Scan profile for the most popular ports, including FTP, SSH, Telnet, SMTP, DNS, HTTP, HTTPS, databases and remote desktops.
- Ability to provide your own list of ports, separated by commas, spaces or semicolon, making it easier to focus on specific services.
- Analysis of service banners, i.e. short welcome messages that servers often send immediately after establishing a connection.
- Automatic assignment of service and overall risk level based on port and recognized banner, without going into complicated technical details.
- A clear summary of the scan, including the number of ports scanned, the number of ports open, and a simple assessment of whether the configuration appears relatively secure.
Who is Network Vulnerability Scanner for
- For administrators and server maintainers who want to quickly verify what ports are exposed to the world and what services are behind them.
- For small businesses using VPS servers that are looking for a simple way to pre-check network security without purchasing expensive corporate scanners.
- For people responsible for information security who need a quick, browser-based tool to prepare an initial report for the management or IT team.
- For cybersecurity students and learners who want to better understand how open ports translate into potential risk to systems.
How to use Network Vulnerability Scanner step by step
The scanner's interface is designed so that it can be used almost immediately, so the entire process can be summarized in a few steps, and yet the final report is detailed enough to allow specific decisions regarding network security to be made based on it.
- In theHost or IP Addressfield, enter the host name or address of the device you want to test, such as an application server, VPN gateway, or internal test server for which you have permission.
- Settimeout on port, i.e. the maximum waiting time for a response from each service, usually a range from 1 to a few seconds is enough, which allows you to achieve a reasonable compromise between accuracy and scan speed.
- Selectport scanning profile: either a list of the most popular ports for common network services, or a mode where you only use your own manually defined list.
- If you want, in thecustom port listfield, enter specific numbers separated by commas, a space or a semicolon, for example 22, 80, 443, 3389, which allows you to add to the scan those services that are important in your environment.
- Click the button to start the scan, then wait a while while Network Vulnerability Scanner checks each specified port, tries to establish a connection, read the banner and assigns an overall risk rating to it.
- Once the scan is complete, read the summary and the list of open ports and services, and then use the findings to ask the technical team to close unnecessary or unsafe services, restrict access, or implement additional security measures.
What you will see in the Network Vulnerability Scanner report
The Network Vulnerability Scanner report is divided into several coherent sections, so you can immediately see the most important information, such as the host, IP address and the number of open ports, and then you can delve into detailed data about services, banners and risk assessment for individual infrastructure elements.
| Report section | What's in it | How you can use it |
|---|---|---|
| Scan Summary | Host, IP address, number of scanned ports, number of open ports and a simple message about the general status of service visibility. | In a few seconds you get an approximate picture of how many services are exposed to your server and whether there are too many of them for its purpose. |
| List of open ports | A table with the port number, assigned service or protocol, risk assessment, and a summary of the potential consequences of keeping a given port open. | From this, it is easy to decide which ports require immediate inspection and which can be left open as necessary for the application to run. |
| Risk Rating | Classification of open services by overall risk level, from low to medium to high, with an emphasis on legacy protocols and administrative services. | Allows you to prioritize security work and focus first on services that, if compromised, would provide access to a large part of the infrastructure. |
| Banners and raw data | Selected fragments of service banners and raw responses that the server sent back during the test connection, in the form of short text snippets. | Thanks to this data, administrators can check whether banners do not reveal too detailed information about the software version and server configuration. |
| Technical information | Total number of ports in the scan, timeout used, scan profile and basic details about completed connections. | This makes it easier to document scans and compare results between subsequent runs of Network Vulnerability Scanner on the same host. |
Why open ports are so important in network security
Every open port on a server is a potential entry point, so the more services that are exposed to the world, the greater the chance that any of them will be running on an outdated version, will be misconfigured or simply no longer needed, and Network Vulnerability Scanner is designed to help you first clean up such exposure before reaching for more advanced tools or full penetration testing.
Examples of service types to consider
- Old text-based protocols that transmit data without encryption and should generally be replaced with more secure equivalents today.
- Administrative ports and remote desktops that provide very wide access to the system and should often only be visible from trusted addresses or via VPN.
- Databases that should not be exposed directly to the Internet unless absolutely necessary and well thought out.
- Web panel services and management tools that, in the event of a configuration error, can open the way to deeper parts of the network.
How to respond to scan results in practice
- First, go through the higher risk ports and ask the technical team if they really need to be visible from the Internet.
- For administrative ports, consider limiting access to only selected IP addresses, network segments, or VPN tunnels.
- If banners reveal exact server versions, plan for updates and configuration changes so as not to reveal too many details about the environment.
- After configuration changes, run the Network Vulnerability Scanner again and compare the report to ensure that risky ports have been closed or restricted.
Network Vulnerability Scanner FAQ
Is Network Vulnerability Scanner safe for my server
Yes, the tool uses classic network connections similar to those made by a regular browser or a simple service client, checking selected ports to see if they respond, what banner they send, and what overall level of risk can be assigned to a given service, without aggressive testing loads or attempts to exploit specific vulnerabilities.
Is the scan result a substitute for a full security audit
Network Vulnerability Scanner is primarily a quick, browser-based tool for initially identifying open ports and services, so it is great as a first step, but it is not a substitute for a comprehensive audit, penetration testing, or detailed configuration analysis, so treat the report as a list of talking points with your security team, not as the sole source of truth about the state of your system.
Can I scan any hosts on the Internet
According to good cybersecurity practices, you should only scan systems to which you have formal rights, for example your own servers, company infrastructure or test environments, because scanning foreign hosts without the consent of their owner may be a violation of regulations, security policies, and in some situations also the law, so treat Network Vulnerability Scanner as a tool for protecting and organizing your network, not for attacks.
How Often Should You Run a Network Vulnerability Scanner
Many IT teams run a simple scan after major operating system updates, service replacements, or changes to firewall configuration and access rules, as well as periodically to check for new, unnecessarily open ports as the infrastructure evolves that are easy to miss without an outside look at the server.
What to do if the report shows many open, higher-risk ports
The best approach is to calmly walk through the results, save the report, prioritize the ports and prepare a short list of recommendations, then pass it on to your administrators or security team, who will decide which services can be shut down, which should be restricted to the internal network, and which require updates or additional defenses.
Run Network Vulnerability Scanner and see what your network looks like from the outside
If you want to easily check what ports on your server are visible from the network, what services have been recognized there and what general level of risk is associated with them, use Network Vulnerability Scanner, generate a clear report and treat it as a starting point for a conversation about security with your IT team, before someone outside the organization looks at your infrastructure in a similar way.
Scan your host now with Network Vulnerability Scanner and receive a report of open ports