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Sinner's Port Scanner is a command-line application you can use to locate open ports on your computer or any other one in your local network.

This way, you can track down system vulnerabilities that expose it to malware attacks. Otherwise, you can find open ports necessary for establishing various kinds of PC connections, for example if you're preparing for a LAN party.

Console tools are mostly preferred by advanced users who don't want to waste time fiddling with a graphical interface to find buttons. It grants them speed by entering commands in text form, one line at a time. On the other hand, this implies committing syntax terms to memory, to the dislike of many users.

Fortunately, Sinner's Port Scanner is simpler than that. It asks you to input the local IP address of a host in LAN (or your own computer), along with the range of ports to verify, namely the beginning and end.

The scanning task may take a while, depending on the number of ports. It lists them one by one in the black and white window, labeling the ports as open or closed. On task completion, it reveals the number of total open and closed ports. Unfortunately, there is no command for resetting the program; it's necessary to restart it to run new a new scan.

Installing the app is not necessary, since it's packed in just one file that can be clicked and launched to deploy a Command Prompt instance for port scanning. It doesn't generate new files on the local disk or update the registry with new entries. To get rid of it, you only have to delete its file. However, .NET Framework must be present on the PC, since it was built with its help.

It may not be particularly resourceful in feature set and takes a pretty long time scanning each port, but Sinner's Port Scanner offers an easy method for identifying open and closed ports in the local network by range. It caters to all user levels, even those new to port scanners.