I'm being scanned

Is it my "secret project" or something else? Whatever it is, it appears that someone, somewhere, has latched onto me and has begun around the clock port scans. It started a few days ago, but hasn't let up at all. Since I have no "server" here, and have never downloaded any "peer-to-peer" software, I really don't know what the attraction might be. For now, my firewall is blocking and tracking the intruder. But it's just so annoying.