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Fragment offset

Posted on 2010-11-30
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Last Modified: 2013-11-29
I am designing packets to test IDS rules, how does one go about setting an offset of 2 or some other random number? I am currently using sendip to accomplish this task, I am assuming it will be the same for all other packet crafting utilities?

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Question by:progjm
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Dave Howe earned 2000 total points
ID: 34244359
for fragments, its not the offset that counts (although NEGATIVE offsets can have significant benefits in rule penetration) but the final packet after reconstruction.

for tools like nemesis, you can usually supply the offset as a command line parameter, passing the actual payload as a file reference. that makes both trivially scriptable.
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