Chapter 1 Configuring a Service Policy

Information About Service Policies

Note When you use a global policy, all features are unidirectional; features that are normally bidirectional when applied to a single interface only apply to the ingress of each interface when applied globally. Because the policy is applied to all interfaces, the policy will be applied in both directions so bidirectionality in this case is redundant.

For features that are applied unidirectionally, for example QoS priority queue, only traffic that enters (or exits, depending on the feature) the interface to which you apply the policy map is affected. See Table 1-2for the directionality of each feature.

Table 1-2

Feature Directionality

 

 

 

 

 

 

Feature

 

Single Interface Direction

Global Direction

 

 

 

Application inspection (multiple types)

Bidirectional

Ingress

 

 

 

 

ASA CSC

 

Bidirectional

Ingress

 

 

 

 

ASA CX

 

Bidirectional

Ingress

 

 

 

ASA CX authentication proxy

Ingress

Ingress

 

 

 

 

ASA IPS

 

Bidirectional

Ingress

 

 

 

NetFlow Secure Event Logging filtering

N/A

Ingress

 

 

 

QoS input policing

Ingress

Ingress

 

 

 

QoS output policing

Egress

Egress

 

 

 

QoS standard priority queue

Egress

Egress

 

 

 

QoS traffic shaping, hierarchical priority

Egress

Egress

queue

 

 

 

 

 

 

TCP and UDP connection limits and timeouts,

Bidirectional

Ingress

and TCP sequence number randomization

 

 

 

 

 

TCP normalization

Bidirectional

Ingress

 

 

 

TCP state bypass

Bidirectional

Ingress

 

 

 

User statistics for Identity Firewall

Bidirectional

Ingress

 

 

 

 

Feature Matching Within a Service Policy

See the following information for how a packet matches rules in a policy for a given interface:

1.A packet can match only one rule for an interface for each feature type.

2.When the packet matches a rule for a feature type, the ASA does not attempt to match it to any subsequent rules for that feature type.

3.If the packet matches a subsequent rule for a different feature type, however, then the ASA also applies the actions for the subsequent rule, if supported. See the “Incompatibility of Certain Feature Actions” section on page 1-5for more information about unsupported combinations.

Note Application inspection includes multiple inspection types, and most are mutually exclusive. For inspections that can be combined, each inspection is considered to be a separate feature.

Cisco ASA Series Firewall ASDM Configuration Guide

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Cisco Systems ASA Services Module, ASA 5505, ASA 5545-X, ASA 5580 Feature Matching Within a Service Policy, Global Direction
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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.
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