5
I wouldn't worry to much about it.
Sometimes Protector is logging my own IP also for DoS and I don't know for what reason.
A while ago I used a proggie to check the links on my website and this was logged as a Crawler.
You can check if the IP addresses belong to registered users of your website.
On
http://www.dnsstuff.com you can check where an IP is coming from (WHOIS lookup) and contact the hoster of that ip address for information.