What exactly (or more or less exactly) is an ICMP packet? My firewall keeps popping up the following:


Remote: iah-core-02.inet.qwest.net [205.171.5.4] - ICMP [3] Destination Unreachable

Details: Someone on address iah-core-02.inet.qwest.net [205.171.5.4] wants to send ICMP packet to your machine

Details about application: tcpip kernel driver