ZA security suite
has been blocking
intruder attempts, and invariably they appear to be from the same IP each time, and high rated but when I try and find out where they are coming from it says the IP is reserved for The Internet Assigned Numbers Authority (IANA)! Should I be a little concerned or just rest assured its a random port scan like they say?

Operating System:Windows XP Pro
Product Name:ZoneAlarm Internet Security Suite