Configuring Addresses Never to Block

Chapter 14 Configuring Attack Response Controller for Blocking and Rate Limiting

Disabling Blocking

Use the never-block-hostsand the never-block-networkscommands in the service network access submode to configure hosts and network that should never be blocked.

The following options apply:

•ip_address—Specifies the IP address of the device that should never be blocked.

•ip_address/netmask—Specifies the IP address of the network that should never be blocked. The format is A.B.C.D/nn.

You must tune your sensor to identify hosts and networks that should never be blocked, not even manually, because you may have a trusted network device whose normal, expected behavior appears to be an attack. Such a device should never be blocked, and trusted, internal networks should never be blocked. You can specify a single host or an entire network.

Note The never-block-hostsand the never-block-networkscommands apply only to the Request Block Host and Request Block Connection event actions. It does not apply to the Deny Attacker Inline, Deny Connection Inline, or Deny Packet Inline event actions. Use event action rules to filter out the hosts that you do not want blocked, denied, or dropped.

Configuring Addresses Never to Be Blocked

To set up addresses never to be blocked by blocking devices, follow these steps:

Step 1 Log in to the CLI using an account with administrator privileges.

Step 2 Enter network access submode.

sensor# configure terminal

sensor(config)# service network-access

sensor(config-net)#

Step 3 Enter general submode.

sensor(config-net)# general

Step 4 Specify the address that should never be blocked:

•For a single host

sensor(config-net-gen)#never-block-hosts 192.0.2.1

•For a network

sensor(config-net-gen)#never-block-networks 209.165.200.224/27

Step 5	Verify the settings.
	sensor(config-net-gen)# show settings
	general
	-----------------------------------------------
	log-all-block-events-and-errors: true <defaulted>
	enable-nvram-write: false <defaulted>
	enable-acl-logging: false <defaulted>
	allow-sensor-block: false default: false
	block-enable: true default: true
	block-max-entries: 100 default: 250
	max-interfaces: 250 <defaulted>
	master-blocking-sensors (min: 0, max: 100, current: 0)
	Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2

OL-29168-01		14-19
OL-29168-01		14-19

IPS4510K9 specifications

Cisco Systems has long been a leading player in network security, and its IPS (Intrusion Prevention System) series is a testament to its commitment to safeguarding digital environments. Among its notable offerings are the IPS4510K9 and IPS4520K9 models, both designed to provide advanced threat protection for mid-sized to large enterprise networks.

The Cisco IPS4510K9 and IPS4520K9 are distinguished by their cutting-edge features that help organizations defend against a myriad of cyber threats. These systems utilize a multi-layered approach to security, integrating intrusion prevention, advanced malware protection, and comprehensive visibility across the network.

One of the primary characteristics of the IPS4510K9 is its high performance. It boasts a throughput of up to 1 Gbps, making it suitable for environments that demand rapid data processing and real-time responses to threats. The IPS4520K9, on the other hand, enhances that capability with improved throughput of up to 2 Gbps, accommodating larger enterprises with heavier network traffic. These models are equipped with powerful processors that support complex signature matching and can intelligently distinguish between legitimate traffic and potential threats.

In addition to performance, both models are designed with scalability in mind. They can be easily integrated into existing Cisco infrastructures. This facilitates a seamless enhancement of security without causing significant interruptions to ongoing operations. Moreover, they offer flexible deployment options, allowing organizations to operate them inline or out of band depending on their specific needs.

The Cisco IPS4510K9 and IPS4520K9 leverage advanced detection technologies, utilizing a variety of signature types and heuristic analysis to detect known and unknown threats effectively. They are equipped with real-time alerting and reporting capabilities, giving security teams immediate visibility into potential breaches and enabling them to respond swiftly.

Furthermore, both models support a range of management options through the Cisco Security Manager, allowing for centralized administration, streamlined policy management, and enhanced monitoring capabilities. Automated updates ensure the systems remain current with the latest threat intelligence, vital for staying ahead of evolving cyber threats.

In summary, the Cisco Systems IPS4510K9 and IPS4520K9 represent powerful solutions for organizations seeking robust intrusion prevention capabilities. With their high performance, scalability, and advanced detection technologies, these systems are essential tools in the ever-changing landscape of cybersecurity, providing enterprises with the peace of mind needed to operate securely in today's digital world.

Cisco Systems IPS4510K9 manual Configuring Addresses Never to Block, For a network, 14-19

Models: IPS4510K9