Introduction

Malware is malicious software that is installed on an unknowing host. Malware that attempts network activity such as sending private data (passwords, credit card numbers, key strokes, or proprietary data) can be detected by the Botnet Traffic Filter when the malware starts a connection to a known bad IP address. The Botnet Traffic Filter checks incoming and outgoing connections against a dynamic database of known bad domain names and IP addresses (the blacklist), and then logs or blocks any suspicious activity.
You can also supplement the Cisco dynamic database with blacklisted addresses of your choosing by adding them to a static blacklist; if the dynamic database includes blacklisted addresses that you think should not be blacklisted, you can manually enter them into a static whitelist. Whitelisted addresses still generate syslog messages, but because you are only targeting blacklist syslog messages, they are informational.

Table of Contents

Introduction

Prerequisites

Traffic flow

Dns configuration is necessary to download the database from Cisco

Botnet Database

Exclusions

Enable this on the interface you need to scan namely outside

Credits

Recommended Reading