Everything you ever wanted to know about ICMP

Submitted by John on Tue, 2005/12/20 - 6:22am
(but were afraid to ask rfc792)

Information on how to create a firewall using ipfw is hard to come by. I’ve found bits and pieces of useful information in various places. I’m working on creating a tutorial on how to configure ipfw for Mac OS X, but in the mean time, here’s some information on the extremely low-level internet packet, ICMP.


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