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ModSecurity 2.5

You're reading from   ModSecurity 2.5 Prevent web application hacking with this easy to use guide

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Product type Paperback
Published in Nov 2009
Publisher Packt
ISBN-13 9781847194749
Length 280 pages
Edition 1st Edition
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Toc

Table of Contents (17) Chapters Close

ModSecurity 2.5
Credits
About the Author
About the Reviewers
1. Preface
1. Installation and Configuration FREE CHAPTER 2. Writing Rules 3. Performance 4. Audit Logging 5. Virtual Patching 6. Blocking Common Attacks 7. Chroot Jails 8. REMO 9. Protecting a Web Application Directives and Variables Regular Expressions Index

Blog spam


The rise of weblogs, or blogs, as a new way to present information, share thoughts, and keep an online journal has made way for a new phenomenon: blog comments designed to advertise a product or drive traffic to a website.

Blog spam isn't a security problem per se, but it can be annoying and cost a lot of time when you have to manually remove spam comments (or delete them from the approval queue, if comments have to be approved before being posted on the blog).

Blog spam can be mitigated by collecting a list of the most common spam phrases, and using the ability of ModSecurity to scan POST data. Any attempted blog comment that contains one of the offending phrases can then be blocked.

From both a performance and maintainability perspective, using the @pmFromFile operator is the best choice when dealing with large word lists such as spam phrases. To create the list of phrases to be blocked, simply insert them into a text file, for example, /usr/local/spamlist.txt:

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