I think we have our main firewall, a PIX 515e pretty well configured.<BR><BR>The access-list only allows certain ports for certain IPs, etc. So far so good.<BR><BR>Blocking icmp in was quite necessary ...

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 ...

When we began this series, we discussed the ICMP (Internet Control Message Protocol). This protocol is the basis for two widely used applications, ping and traceroute. In this lesson and the next, we ...

Network tools are essential for solving issues with a computer network that is not performing as it should. There are quite a few things can do to aid in returning a network to its rightful state, and ...