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ICMP Usage in Scanning 38 Copyright Ó Ofir Arkin, 2000 http://www.sys-security.com 9.0 Acknowledgment   I would like to thank the following people for their help with/during this research. Ariel Pisetsky for going over this paper correcting my English, and for his moral support. Christopher Tresco, Systems Administrator at the Massachusetts Institute of Technology provided necessary test systems to verify my findings. Special thanks to mr2940 for his patience while I introduced my new ideas. James Cudney, Michael, Pat, for their support when the times where bad.