Does anyone have some good links for modern best practices? Internally we have some disagreement about whether we should allow or block ICMP and traceroute (well, UDP, since the ICMP policy would ...

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 ...

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 ...