It’s the cornerstone of any pentester’s toolkit and helps aid in network discovery, device vulnerability, and network reconnaissance. Nmap is one of the most widely used and trusted port scanner tools in the world of cybersecurity. You can test out ManageEngine OpUtils free through a 30-day free trial. OpUtils is available for Windows Server and Linux systems. In a matter of seconds, you can have a device’s full range of ports and their status displayed for analysis. What makes this tool great is that it does just exactly what you want it to do. OpUtils lets you scan the entire network based on a custom IP range for open ports, or alternatively, you can choose a single device and run an entire port scan over all ports. This includes a bandwidth monitor, wake-on-LAN tool, rogue device detection, switch port management, SNMP monitoring tools, and about a half dozen smaller tools tailored to specific devices such as Cisco. What makes OpUtils great is that it’s technically a bundle of some of the most frequently used tools by techs and sysadmins. The interface is very modern and clean unlike some of the old school scanning tools, which is refreshing, to say the least. ManageEngine OpUtils is a bundle of different tools that contains a port mapper, an IP address manager, and a physical switch portmapper. SolarWinds Port Scanner Download 100% FREE Tool 2. This tool is available for free for Windows operating systems only. Having such reliable OS detection and ease of use puts SolarWinds Port Scanner near the top of our list. This is called a “Fingerprint” and is usually based on a number of different factors such as TCP/IP stack or other information that the device is broadcasting. The OS detection feature is used by attackers to gain contextual information about what services could be running, as well as narrow down what types of attacks are possible.Įach tool has its own methods of identifying operating systems. The tool gives a great quick breakdown if the ports are open, closed, or filtered, and even performs OS detection. Results can be exported into several formats such as XML, CSV, and XLSX and fully supports IANA port names that can be edited in a separate file after scanning has completed. For administrators that run scans regularly scan configs can be saved and reused at later on other networks or at a later time. The tool also utilizes multi-thread scanning and adaptive timing behavior to shorten the total time needed to scan, making it a great tool for larger networks with more devices. By selecting an individual device or range of IPs SolarWinds Port Scanner will get to work and display the results in the same window on the right-hand column. SolarWinds Port Scanner combines the raw power of Nmap and displays its outputs elegantly through a simple and intuitive interface. Some tools below that have multiple uses, but today we’ll be focusing on their port scanning features. Let’s dive into some of the best port scanning tools on the market today, and review exactly why they made the list. Running these tools on networks you do not have permission to is deemed illegal in most countries. If for whatever reason you need to run a port scan tool on someone else’s network, ensure you have written permission to do so. Using a port scanner tool on a network you own is perfectly fine. Performing a network security audit with a trusted port scanner tool can help detect some of the stealthiest types of malware and attacks. These ports are essentially exploited as backdoors to exfiltrate stolen data and push out commands to existing malware on the network. Ports can be left open unintentionally, or forced open by rootkits and other advanced types of malware. Port scanner tools give admins a chance to shut down unused ports that are open and terminate suspicious connections. As an administrator, we can run these tools first to defend from potential attacks. With that information, attackers will attempt to use known exploits over those ports to gain unauthorized access.Ĭhecking for unnecessary open ports is usually one of the first steps an attacker will do when trying to find ways into your network. These details combined with manufacturer information can help give context as to what a device’s purpose is on the network. Here’s our shortlist of the best port scanner tools:įrom network administrators, security experts, and even hackers all port scanners help detect what ports are open, closed, or filtered on a device that is on a network. In this article, we’ll review the six best port scanner tools you can use to help discover vulnerabilities, and better defend your network. As a network administrator, do you really know what’s happening on your network? Using a port scanning tool can help identify potential vulnerabilities as well as paint a detailed picture as to what devices are open to certain types of communication.
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