Table of Contents

Overview of Lawful Intercept Using Flow-Tap

Primary Requirements for Lawful Intercept

Flow-Tap Features

Components of Flow-Tap

Configuring Flow-Tap Services for Lawful Intercept

Requirements For Establishing a Flow-Tap Session

Flow-Tap Topology

Configuring Flow-Tap Services

Flow-Tap Configuration on Juniper Networks Router

Flow-Tap Filter Operation

Identifying and Capturing Target Packets using Dynamic Filtering

Sample LEA Filter Configuration

Sample DTCP Parameter File

Provisioning Flow-Tap to a Linux Mediation Device

Flow-Tap Script for Linux Device

Invoking a Perl Script from a Linux Device

Troubleshooting Flow-Tap

General Troubleshooting Steps

Troubleshooting No Packets Received by the Analyzer Software

Frequently Asked Questions About Using Flow-Tap