From owner-freebsd-pf@FreeBSD.ORG  Wed Aug 20 14:27:41 2008
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Date: Wed, 20 Aug 2008 16:13:01 +0200
From: Leslie Jensen <leslie@eskk.nu>
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Subject: port stealth mode?
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Hello

I've done some testing with Steve Gibsons "Shields up"

https://www.grc.com/x/ne.dll?bh0bkyd2

These tests lists the ports as closed but visible.

Instead the site suggest that one uses stealth so that the ports are not 
visible from the Internet.

Is there a way to achieve this with PF?

Thanks

Leslie