There’s a plethora of Mac OS X security software available but some have proven to be quite 
exceptional and essential for anyone interested in computer security. Here is a list of tools you all should have in your Applications folder.
Net Tool Box (Download)
Net Tool Box is a multi-purpose network utility for Mac OS X. It integrates over 20 powerful networking utilities into one easy-to-use program. The intuitive design and hardcore features of Net Tool Box ease the workload for thousands of networking professionals, developers, administrators and educators every day. Another powerful feature of Net Tool Box is its built-in port database, containing over 2,500 port numbers and their registered use. This database is integrated into relevant tools to allow quick searching for a port or its use. What used to take several minutes of searching the Internet, can now happen in an instant. HNS - Essential Security Software for Mac OS X Users
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