Command Line Port Scanner OS X

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Who knew that OS X has a command line port scanner? I for one didn't. I've always just used the Network Utility version. Here's how to access it.

As the superuser run this:

ln /Applications/Utilities/Network\ Utility.app/Contents/Resources/stroke /bin/stroke
chmod uo+x /bin/stroke

Then as any user you can call it from the terminal as such:

stroke address startPort endPort

So to check your local machine do:

stroke 127.0.0.1 0 1024

You should see output that looks similar to this:

Port Scanning host: 127.0.0.1

Open TCP Port: 80 http
Open TCP Port: 631 ipp