The goal of the firewall is to prevent remote computers from accessing yours and provide an alert of unrequested traffic that was blocked along with the IP address. Even your ISP will send out regular checks to see if your computer is still there.
Firewall alert messages are a response to unrequested traffic. These alerts are often classified by the network Port they arrive on. It is not unusal for a firewall to give numerous alerts regarding attempted access. Infected machines on the net randomly scan a block of IP addresses looking for vulnerable ports and make repeated attempts to gain access. Your firewall is doing its job (blocking) and alerting you about these attempts.
If the alerts become too annoying, you should be able to go into your firewall settings and turn them off.
Edited by quietman7, 23 May 2007 - 09:35 PM.