Writing Your Own Preprocessor
Problem
None of these preprocessors do what I want. How do I write my own?
Solution
Actually, this really depends on what you are trying to accomplish with your new preprocessor. Are you trying to create an application decoder to pass plain text data back the rules engine for analysis? Are you trying to create an anomaly detection tool out of nonstandard rules?
Discussion
For a really long, hard look at how to create your own preprocessor, see Jay Beale's entire chapter on the subject in the Snort 2.1 book from Syngress Publishing.
See Also
Beale, Jay. Snort 2.1 Intrusion Detection. Rockland, MA: Syngress, 2004.
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Administrative Tools |
Installing Snort from Source on Unix
- Installing Snort from Source on Unix
- Installing Snort Binaries on Linux
- Installing Snort on Solaris
- Installing Snort on Windows
- Uninstalling Snort from Windows
- Installing Snort on Mac OS X
- Uninstalling Snort from Linux
- Upgrading Snort on Linux
- Monitoring Multiple Network Interfaces
- Invisibly Tapping a Hub
- Invisibly Sniffing Between Two Network Points
- Invisibly Sniffing 100 MB Ethernet
- Sniffing Gigabit Ethernet
- Tapping a Wireless Network
- Positioning Your IDS Sensors
- Capturing and Viewing Packets
- Logging Packets That Snort Captures
- Running Snort to Detect Intrusions
- Reading a Saved Capture File
- Running Snort as a Linux Daemon
- Running Snort as a Windows Service
- Capturing Without Putting the Interface into Promiscuous Mode
- Reloading Snort Settings
- Debugging Snort Rules
- Building a Distributed IDS (Plain Text)
- Building a Distributed IDS (Encrypted)
Logging to a File Quickly
- Logging to a File Quickly
- Logging Only Alerts
- Logging to a CSV File
- Logging to a Specific File
- Logging to Multiple Locations
- Logging in Binary
- Viewing Traffic While Logging
- Logging Application Data
- Logging to the Windows Event Viewer
- Logging Alerts to a Database
- Installing and Configuring MySQL
- Configuring MySQL for Snort
- Using PostgreSQL with Snort and ACID
- Logging in PCAP Format (TCPDump)
- Logging to Email
- Logging to a Pager or Cell Phone
- Optimizing Logging
- Reading Unified Logged Data
- Generating Real-Time Alerts
- Ignoring Some Alerts
- Logging to System Logfiles
- Fast Logging
- Logging to a Unix Socket
- Not Logging
- Prioritizing Alerts
- Capturing Traffic from a Specific TCP Session
- Killing a Specific Session
How to Build Rules
- How to Build Rules
- Keeping the Rules Up to Date
- Basic Rules You Shouldnt Leave Home Without
- Dynamic Rules
- Detecting Binary Content
- Detecting Malware
- Detecting Viruses
- Detecting IM
- Detecting P2P
- Detecting IDS Evasion
- Countermeasures from Rules
- Testing Rules
- Optimizing Rules
- Blocking Attacks in Real Time
- Suppressing Rules
- Thresholding Alerts
- Excluding from Logging
- Carrying Out Statistical Analysis
Detecting Stateless Attacks and Stream Reassembly
- Detecting Stateless Attacks and Stream Reassembly
- Detecting Fragmentation Attacks and Fragment Reassembly with Frag2
- Detecting and Normalizing HTTP Traffic
- Decoding Application Traffic
- Detecting Port Scans and Talkative Hosts
- Getting Performance Metrics
- Experimental Preprocessors
- Writing Your Own Preprocessor
Managing Snort Sensors
- Managing Snort Sensors
- Installing and Configuring IDScenter
- Installing and Configuring SnortCenter
- Installing and Configuring Snortsnarf
- Running Snortsnarf Automatically
- Installing and Configuring ACID
- Securing ACID
- Installing and Configuring Swatch
- Installing and Configuring Barnyard
- Administering Snort with IDS Policy Manager
- Integrating Snort with Webmin
- Administering Snort with HenWen
- Newbies Playing with Snort Using EagleX
Generating Statistical Output from Snort Logs
- Generating Statistical Output from Snort Logs
- Generating Statistical Output from Snort Databases
- Performing Real-Time Data Analysis
- Generating Text-Based Log Analysis
- Creating HTML Log Analysis Output
- Tools for Testing Signatures
- Analyzing and Graphing Logs
- Analyzing Sniffed (Pcap) Traffic
- Writing Output Plug-ins
Monitoring Network Performance
- Monitoring Network Performance
- Logging Application Traffic
- Recognizing HTTP Traffic on Unusual Ports
- Creating a Reactive IDS
- Monitoring a Network Using Policy-Based IDS
- Port Knocking
- Obfuscating IP Addresses
- Passive OS Fingerprinting
- Working with Honeypots and Honeynets
- Performing Forensics Using Snort
- Snort and Investigations
- Snort as Legal Evidence in the U.S.
- Snort as Evidence in the U.K.
- Snort as a Virus Detection Tool
- Staying Legal
Index
Snort Cookbook
ISBN: 0596007914
EAN: 2147483647
EAN: 2147483647
Year: 2006
Pages: 167
Pages: 167
