Tapping on the walls
Source: LinuxWorld - Posted by Jen Olson   
Hacks/Cracks Paring down your network services isn't the only way to protect your systems against attacks: port scanning can also be an effective tool. In this month's Building Blocks of Security, Sandra Henry-Stocker shows you how to stay one step ahead of . . . Paring down your network services isn't the only way to protect your systems against attacks: port scanning can also be an effective tool. In this month's Building Blocks of Security, Sandra Henry-Stocker shows you how to stay one step ahead of your enemy. Minimizing services is just the beginning of adopting a defensive posture, however. Numerous security experts suggest that thinking like an attacker is the only way to prepare yourself to defend your site. This month, we'll examine port scanning (sending packets to systems and gaining insight from the responses) -- which has been compared to tapping on walls to determine where beams are located -- and look at what an intruder can determine about services you're running.

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