Free Tools For Offensive Security by John H. Sawyer.
From the post:
There are a lot of excellent offensive security tools available online for free, thanks to open-source licenses and the security professionals who’ve created tools in an effort to give back to the community. But because they are created by individuals or open-source efforts without the marketing and promotion resources of a vendor, these tools may not be well known in the enterprise.
Two years ago I wrote a Tech Insight on offensive security tools that defenders can leverage to help find vulnerabilities and secure their environments. Today, I want to update that list with some currently available tools that should be included in every offensive and defensive security professional’s toolbox.
I truly believe that a security professional focused on defense or offense must understand the tools and techniques used by the other side. Those who defend a network should be aware of the attacks they will face and the ways that attackers avoid detection. To become familiar with these approaches, they should try out some of these same attack methods.
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Government surveillance, corporate data gathering, and network security breaches are proof that not everyone is on the Kumbaya Information train. Choose your security strategy accordingly.