ICMP_Scanning_25
ICMP Usage in Scanning
25
Copyright Ó Ofir Arkin, 2000
http://www.sys-security.com
00:13:12 prober> 192.168.2.5: icmp: echo reply
00:13:13 router> prober: icmp: host unreachable
Theoretically speaking, using any ICMP type in order to inverse map a network using a Router is
possible. The downside would be that some Routers would filter unwanted traffic of certain ICMP
types.