ICMP Usage in Scanning v3.0 - This paper outlines what can be done with the ICMP protocol regarding scanning. Although it may seem harmless at first glance, this paper includes details on plain Host Detection techniques, Advanced Host Detection techniques, Inverse Mapping, Trace routing, OS fingerprinting methods with ICMP, and which ICMP traffic should be filtered on a Filtering Device.
75cc3f1aca7052c3ce41ac23e57dd34c03d0762e2b433480c810bfd580de6b74