A denial-of-service (DoS) attack is an attempt to deny service to legitimate users by sending extreme amounts of requests to a server.

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How to solve DDOS attacks in Windows Server 2008 R2 / Windows Server 2012? [closed]

Any software for windows Writing custom (intelligent) microsoft windows firewall extension (C#/C++/C) Writing custom (intelligent) firewall for windows Installing nginx etc. on the same computer and ...
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What this command :(){ :|: & };: does? [duplicate]

What does this shell command do in Linux :(){ :|: & };: How can it be used in Denial of Service attacks?
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If someone downloaded 600GB , can that be a DOS attack

Last night someone exploited some vulnerability in my site and then upload a PHP script to my images folder. I have an Amazon EC2 server with CentOS. Then the hacker downloaded 600GB and increased ...