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SSFSNORT - Securing Cisco Networks with Open Source Snort


Securing Cisco Networks with Open Source Snort is an instructor-led, lab-intensive course that introduces students to the open source Snort technology as well as rule writing. You will learn how to build and manage a Snort system using open source tools, plug-ins, and the Snort rule language to help manage, tune, and deliver feedback on suspicious network activity.

This course combines lecture materials and hands-on labs throughout to make sure that you are able to construct a solid, secure Snort installation and write Snort rules using proper syntax and structure.


Upon successful completion of this course and it's labs you should be able to:

  • Understand what Snort is and its basic architectural components
  • Understand Snorts dynamic plug-in capapbilities
  • Understand the different modes of Snort operation
  • Perform installation and configuration of the Snort system
  • Install and configure Snorby
  • Configure and tune the Snort pre-processors
  • Understand rule maintenance and techniques to keep rules current
  • Create Snort rules using both simple and advanced rule-writing techniques
  • Monitor performance of a Snort deployment


The following prerequisites are recommended:

  • Technical understanding of TCP/IP networking and network architecture
  • Proficiency with Linux and UNIX text editing tools (vi editor is suggested but not required)

Who Should Attend

This course is designed for technical professionals who need to know how to deploy open source intrusion detection systems (IDS) and intrusion prevention systems (IPS), as well as write Snort rules. The primary audience for this course includes:

  • Security administrators
  • Security consultants
  • Network administrators
  • System engineers
  • Technical support personnel using open source IDS and IPS
  • Channel partners and resellers


Module 1: Intrusion Sensing technology, Challenges, and Sensor Deployment
Module 2: Introduction to Snort Technology
Module 3: Snort Installation
Module 4: Cofiguring Snort for Database Output and Graphical Analaysis
Module 5: Operating Snort
Module 6: Snort Configuration
Module 7: Configuring Snort Preprossors
Module 8: Keeping Rules Up to Date
Module 9: Budilidng a Distributed Snort Instalation
Module 10: Basic Rule Syntax and Usage
Module 11: Buildling a Snort IPS Installation
Module 12: Rule Optimization
Module 13: Using PCRE in Rules
Module 14: Basic Snort Tuning
Module 15: Using Byte_Jump/Test/Extract Rule Options
Module 16: Protocol Modeling Concepts and Using Flowbits in Rule Writing
Module 17: Case Studies in Rule Writing and Packet Analysis

Lab Outline

Lab 1: Install Snort and Its Components (Module 3)
Lab 2: Barnyard2 Installation (Module 4)
Lab 3: Barnyard and Snorby Configuration (Module 4)
Lab 4: Operating Snort (Module 5)
Lab 5: Configuring Your IDS/IPS Installation (Module 6)
Lab 6: Portscan Configuration (Module 7)
Lab 7: Stream Reassembly (Module 7)
Lab 8: Pulled Pork Installation, Configuration, and Usage (Module 8)
Lab 9: Building a Distributed Snort Installation (Module 9)
Lab 10: Wrighting Custom Rules (Module 10)
Lab 11: Building an Inline IPS (Module 11)
Lab 12: Using the Drop Action (Module 11)
Lab 13: Using the Replace Action (Module 11)
Lab 14: Optimizing Rules (Module 12)
Lab 15: Using and Testing PCRE in Rules (Module 13)
Lab 16: Using Event Filtering (Module 14)
Lab 17: Using Supression (Module 14)
Lab 18: Configuring Rule Profiling (Module 14)
Lab 19: Detecting SADMIND Trust with Byte_Jump and Byte_Test (Module 15)
Lab 20: Using the Bitwise AND Operation in Byte_Test (Module 15)
Lab 21: Detecting ZenWorks Directory Traversal with Byte_Extract (Module 15)
Lab 22: Writing Flowbits Rules (Module 16)
Lab 23: Research and Packet Analysis (Module 17)
Lab 24: Revisiting the Kaminsky Vulnerability (Module 17)