Appendix A. Useful Security Websites


The purpose of this appendix is to provide you with a quick reference of links to useful security websites.


We spend substantial time in front of customers, and one of the questions we are frequently asked is whether we have any recommendations for security websites. This appendix is dedicated solely to our favorite websites.

This is just a sampling of sites that are available on the web. We realize that there are many, many useful security sites. It just so happens that these are our favorites. We apologize in advance if your favorite site or if a site you maintain isn’t included in this list.

Security Links and Descriptions

These links are broken into four different categories ...

Get Security Threat Mitigation and Response: Understanding Cisco Security MARS now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.