14 August, 2006
Syngress Publishing has allowed me to post one of
the chapters I wrote for the book
"Intrusion Prevention and Active Response: Deploying Network and Host IPS". This chapter is entitled
"
Network Inline Data Modification" and explores the concept and implications
of configuring an Intrusion Prevention System (IPS) to dynamically rewrite application
layer data en route over a network. A PDF version
of this chapter can be downloaded
here.
The book has received positive reviews (including one by Richard Bejtlich of
taosecurity.com) on
amazon.com.
The actual data replacement is accomplished with Snort_inline or with a
patch
I wrote for the Netfilter string match extension and bundled with
fwsnort.