What are the minimum ICMP packet types required to allow Windows ping and tracert to function properly across the internet?<P>In a CISCO ACL this works<BLOCKQUOTE ...

ping is a diagnostic tool used for verifying connectivity between two hosts on a network. It sends Internet Control Message Protocol (ICMP) echo request packets to a remote IP address and watches for ...

Recently, I noticed that there has been a surge in ICMP packets between some of my Active Directory controllers and Exchange servers. Virus scanning proved that the servers were clean. Is there any ...

BlackNurse is the name of a recently discovered network attack that can crash firewalls and routers via ICMP packets, known by most of us as "pings." The attack came to light after TDC, a company that ...