JPortScanner

JPortScanner is a Java-based application you can use to scan the local network for open ports. Those experienced can use it to their advantage and find vulnerable ports to prevent malware attacks. You can also search for open ports when preparing for a LAN party, for example.

Besides the fact that you must have Java Runtime Environment on your PC, it's not necessary to install JPortScanner. You can just unpack the downloaded archive to a custom directory on your hard drive or to a USB flash disk and directly launch the app on any PC to look for open ports in the local network.

The port finder is wrapped in a command-line interface. After calling its process, it's necessary to enter the IP address or domain you want to check for open ports.

In addition to the port range, the program shows a list with the number of each open port, as well as the types of protocol. There are no commands implemented for dumping this information to file. However, you can select everything with your mouse and copy data to the Clipboard by pressing Enter.

We didn't have any trouble running JPortScanner on Windows 10 in our evaluation, although the software project hasn't been updated for a considerable amount of time.

It scanned ports rapidly in our local network and accurately detected the open ones. The downloaded package also includes JPortScanner for OS X for those who want to run the tool on their Macs.

All things considered, JPortScanner may not be a resourceful piece of software, but it delivers a simple and straightforward method for finding open ports on your local networks, even if you don't have much knowledge about networking tools.