What would it take to knock a server offline that has 8 gigs of RAM, and a 3.2GH cpu operating on Apache?

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Would you correct your question? I'm assuming that you mean to ask "What would it take..." – gWaldo Sep 7 '10 at 19:53
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Put that monster system on the end of a 14.4kbps modem and it wouldn't take much. Put it on a 10gig link in a major colo, and the story changes. – chris Sep 7 '10 at 20:00
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2 Answers

You also need to factor in each layer of the software stack - b/s allowed per host, max connections allowed, automatic/temporary dropping of entire IP ranges on suspicious requests, etc. Also if load is balanced with other servers.

Or if you face a vengeful sysadmin, you may face auto-redirects of suspicious requests to virus-laiden porn sites in Russia, auto-subscribing each suspect IP address to popular blocklists, or auto-emailing a compiled list of suspect IP addresses to their ISP complaint dept while the network is still up.

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Assuming that you mean to ask "What would it take...", the whole answer is a big fat "It depends."

The only way to accurately gauge what it would take is to make a concerted effort to D.O.S. it. There are so many factors that can contribute to a DOS that this question is impossible to answer given the very limited information provided.

Somehow, I don't think this is the question that you really want the answer to... It may help if you post what you're really trying to determine.

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