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Snort++
License: Other
This project forked from snort3/snort3
Snort++
License: Other
Snort++ The Snort++ project has been hard at work for a while now and we are finally ready to release the first alpha of the next generation Snort IPS (Intrusion Prevention System). This post will show you what Snort++ has to offer and guide you through the steps from download to demo. If you are unfamiliar with Snort you should take a look at the Snort documentation first. We will cover the following topics: * Overview * Dependencies * Download * Build Snort * Run Snort * Documentation * Squeal OVERVIEW This first alpha release is based on early Snort 2.9.6 and excludes all but one of Snort's dynamic preprocessors (ftp_telnet). Work is underway to port that functionality and sync with 2.9.7; those updates will be rolled out as they become available. Project = Snort++ Binary = snort Version = 3.0.0-a1 Here are some key features in this alpha release: * Support multiple packet processing threads * Use a shared configuration and attribute table * Use a simple, scriptable configuration * Make key components pluggable * Autodetect services for portless configuration * Support sticky buffers in rules * Autogenerate reference documentation * Provide better cross platform support Additional features on the roadmap include: * Use a shared network map * Support pipelining of packet processing * Support hardware offload and data plane integration * Rewrite critical modules like TCP reassembly and HTTP inspection * Support proxy mode * Facilitate component testing * Simplify memory management * Provide all of Snort's functionality DEPENDENCIES If you already build Snort, you may have everything you need. If not, grab the latest: * autotools or cmake to build from source * g++ >= 4.8 or other C++11 compiler * daq from http://www.snort.org for packet IO * dnet from http://code.google.com/p/libdnet/ for network utility functions * LuaJIT from http://luajit.org for configuration and scripting * pcap from http://www.tcpdump.org for tcpdump style logging * pcre from http://www.pcre.org for regular expression pattern matching * zlib from http://www.zlib.net for decompression * pkgconfig from http://www.freedesktop.org to build the example plugins DOWNLOAD There are two sets of source tarballs, once for autotools and one for cmake. snort-3 contains the base program and snort_extra has example plugins. snort-3.0.0-a1-130-auto.tar.gz snort-3.0.0-a1-130-cmake.tar.gz BUILD SNORT First do these setup steps: export my_path=/path/to/snorty tar zxf snort-tarball cd snort-3.0.0* Then do one of the following: To build with autotools, simply do the usual from the top level directory: ./configure --prefix=$my_path make -j 8 install To build with cmake and make, run configure_cmake.sh. It will automatically create and populate a new subdirectory named 'build'. ./configure_cmake.sh --prefix=$my_path cd build make -j 8 install Note: * If you can do src/snort -V you built successfully. * If you are familiar with cmake, you can run cmake/ccmake instead of configure_cmake.sh. * cmake --help will list any available generators, such as Xcode. Feel free to use one, however help with those will be provided in a later post. RUN SNORT First set up the environment: export LUA_PATH=$my_path/include/snort/lua/\?.lua\;\; export SNORT_LUA_PATH=$my_path/etc/snort Then give it a go: Snort++ provides lots of help from the command line. Here are some examples: $my_path/bin/snort --help $my_path/bin/snort --help-module suppress $my_path/bin/snort --help-config | grep thread Examine and dump a pcap: $my_path/bin/snort -r pcap $my_path/bin/snort -K text -d -e -q -r pcap Verify a config, with or w/o rules: $my_path/bin/snort -c $my_path/etc/snort/snort.lua $my_path/bin/snort -c $my_path/etc/snort/snort.lua -R $my_path/etc/snort/sample.rules Run IDS mode. In the following, replace a.pcap with your favorite. pcaps/ is a directory with one or more *.pcap files: $my_path/bin/snort -c $my_path/etc/snort/snort.lua -R $my_path/etc/snort/sample.rules \ -r a.pcap -A alert_test -n 100000 Let's suppress 1:2123. We could edit the conf or just do this: $my_path/bin/snort -c $my_path/etc/snort/snort.lua -R $my_path/etc/snort/sample.rules \ -r a.pcap -A alert_test -n 100000 --lua "suppress = { { gid = 1, sid = 2123 } }" Go whole hog on a directory with multiple packet threads: $my_path/bin/snort -c $my_path/etc/snort/snort.lua -R $my_path/etc/snort/sample.rules \ --pcap-filter \*.pcap --pcap-dir pcaps/ -A alert_fast --max-packet-threads 8 DOCUMENTATION Take a look at the manual, parts of which are generated by the code so it stays up to date: $my_path/share/doc/snort/snort_manual.pdf $my_path/share/doc/snort/snort_manual.html $my_path/share/doc/snort/snort_manual/index.html It does not yet have much on the how and why, but it does have all the currently available configuration, etc. Some key changes to rules: * you must use comma separated content sub options like this: content:"foo", nocase; * buffer selectors must appear before the content and remain in effect until changed * pcre buffer selectors were deleted * check the manual for more on Snort++ vs Snort * check the manual reference section to understand how parameters are defined, etc. It also covers new features not demonstrated here: * snort2lua, a tool to convert Snort 2.X conf and rules to the new form * a new HTTP inspector, new_http_inspect - incomplete but off to a good start * a binder, for mapping configuration to traffic * a wizard for port-independent configuration * improved rule parsing - arbitrary whitespace, C style comments, #begin/#end comments * local and remote command line shell SQUEAL o")~ We hope you are as excited about Snort++ as we are. Although a lot of work remains, we wanted to give you a chance to try it out and let us know what you think on the snort-users list. In the meantime, we'll keep our snout to the grindstone.
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