On Tue, 01 Jun 2010 13:08:32 +0530, rajendra prasad said: > Request length is less than the response length.So, processing small amount > of data is better than of processing bulk data. Response may have encrypted > data. Buffering all the client-server transactions and validating signatures > on them is difficult. All of that is total wanking. The *real* reason why IPS product designers concentrate on servers is because hopefully the server end is run by some experienced people with a clue, and maybe even hardened to last more than 35 seconds when a hacker attacks. Meanwhile, if anybody designed an IPS for the client end, it would just get installed on an end-user PC running Windows, where it will have all the issues and work just as well as any other anti-malware software on an end-user PC. Oh - and there's also the little detail that a site is more likely to buy *one* software license to run on their web server (or whatever), rather than the hassle of buying and administering 10,000 end-user licenses. Especially when an IPS on the client end doesn't actually tell you much about attacks against the valuable target (the server) from machines you haven't installed the end-user IPS on (like the entire rest of the Internet).
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