How the Botnet Traffic Filter Works

Chapter 26 Configuring the Botnet Traffic Filter

Information About the Botnet Traffic Filter

Figure 26-1shows how the Botnet Traffic Filter works with the dynamic database plus DNS inspection with Botnet Traffic Filter snooping.

Figure 26-1 How the Botnet Traffic Filter Works with the Dynamic Database

Security Appliance

			DNS		Dynamic
			Reverse		Database	DNS Server
			Lookup Cache		2a. Add
					1a. Match?
			3a. Match?		DNS Snoop	DNS Reply:
1	DNS Request:					2 209.165.201.3
	bad.example.com					Internet
						Internet
Infected	3	Connection to:		Botnet Traffic
Infected	3	209.165.201.3		Botnet Traffic
Host				Filter
				Filter
			3b. Send			Malware Home Site	248631
Syslog Server			Syslog Message/Drop Traffic			Malware Home Site
			Syslog Message/Drop Traffic			209.165.201.3
						209.165.201.3

Figure 26-2shows how the Botnet Traffic Filter works with the static database.

Figure 26-2 How the Botnet Traffic Filter Works with the Static Database

	Security Appliance
DNS		Static 1	Add entry:
DNS		Database	bad.example.com
Host Cache		Database	DNS Server
Host Cache		2a. Add
		2a. Add

		3a. Match?	1a. DNS Request:		DNS Reply:
			1a. DNS Request:	2
	Connection to:		bad.example.com
3	Connection to:		bad.example.com		209.165.201.3
3	209.165.201.3			Internet
	209.165.201.3

Infected

Botnet Traffic

Host

Filter

3b. Send

248632

Malware Home Site

Syslog Message/Drop Traffic

Syslog Server

209.165.201.3

Cisco ASA Series Firewall ASDM Configuration Guide

26-5

ASA Services Module, ASA 5555-X, ASA 5545-X, ASA 5585-X, ASA 5580 specifications

Cisco Systems has long been a leader in the field of network security, and its Adaptive Security Appliance (ASA) series is a testament to this expertise. Within the ASA lineup, models such as the ASA 5505, ASA 5580, ASA 5585-X, ASA 5545-X, and ASA 5555-X stand out for their unique features, capabilities, and technological advancements.

The Cisco ASA 5505 is designed for small businesses or branch offices. It provides essential security features such as firewall protection, flexible VPN capabilities, and intrusion prevention. The ASA 5505 supports a user-friendly interface, allowing for straightforward management. Its built-in threat detection and prevention tools provide a layered defense, and with scalability in mind, it can accommodate various expansion options as organizational needs grow.

Moving up the line, the ASA 5580 delivers greater throughput and advanced security features. This model is suited for medium to large enterprises that require robust protection against increasingly sophisticated threats. Its multi-core architecture allows it to manage high volumes of traffic seamlessly while maintaining excellent performance levels. The ASA 5580 also supports application-layer security and customizable access policies, making it highly adaptable to diverse security environments.

The ASA 5585-X further enhances Cisco's security offerings with advanced malware protection and extensive security intelligence capabilities. It incorporates next-generation firewall features, including context-aware security, and supports advanced threat detection technologies. This model is ideal for large enterprises or data centers that prioritize security while ensuring uninterrupted network performance and availability.

For enterprises requiring a balance of performance and security, the ASA 5545-X presents a compelling option. This model features scalable performance metrics, high availability, and integrated advanced threat protection. Coupled with advanced endpoint protection and detailed monitoring capabilities, the ASA 5545-X enables organizations to manage their security posture effectively.

Lastly, the ASA 5555-X blends cutting-edge technologies with strong security infrastructures. It boasts high throughput and the ability to execute deep packet inspections. Its sophisticated architecture supports threat intelligence feeds that provide real-time security updates, making it a powerful tool against modern threats.

Each of these Cisco ASA models brings specific advantages to varied environments. Their integrative capabilities enable businesses to enhance their security postures while benefiting from seamless scalability and management. As cybersecurity threats evolve, these advanced appliances play a vital role in protecting valuable digital assets.

Cisco Systems ASA 5545-X, ASA 5505, ASA 5555-X, ASA 5580 How the Botnet Traffic Filter Works, 26-5

Models: ASA Services Module ASA 5555-X ASA 5545-X ASA 5585-X ASA 5580 ASA 5505