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This paper presents the design and discusses the results of a secured high-interaction honeypot. The challenge is to have a honeypot that welcomes attackers, allows userland malicious activities but prevents system corruption. The honeypot must authorize real malicious activities. It must ease the analysis of those activities. A clustered honeypot is proposed for two kinds of hosts. The first class prevents a system corruption and never has to be reinstalled. The second class assumes a system corruption but an easy reinstallation is available. Various off-the-shelf security tools are deployed to detect a corruption and to ease analysis. Moreover, host and network information enable a full analysis for complex scenario of attacks.
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