How malicious hackers attack

Friday, 25 August 2006, 1:37 PM EST

When developing software or defending a network, it’s helpful to understand how malicious hackers hack. A dedicated attacker will fingerprint the intended host, starting first with available IP addresses and then perform TCP - and sometimes UDP - scans looking for active and listening TCP/IP ports. Each found port is then further fingerprinted to determine the listening application. For example, if port 80 is found, is it running Apache or IIS?

At InfoWorld.

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