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Chapter 11 Configuring Inspection for Voice and Video Protocols

RTSP Inspection

Where the regex regex_name argument is the regular expression you created in Step 1. The class regex_class_name is the regular expression class map you created in Step 2.

Step 4 To create an RTSP inspection policy map, enter the following command:

ciscoasa(config)# policy-map type inspect rtsp policy_map_name

ciscoasa(config-pmap)#

Where the policy_map_name is the name of the policy map. The CLI enters policy-map configuration mode.

Step 5 (Optional) To add a description to the policy map, enter the following command: ciscoasa(config-pmap)# description string

Step 6 To apply actions to matching traffic, perform the following steps.

a.Specify the traffic on which you want to perform actions using one of the following methods:

•Specify the RTSP class map that you created in Step 3 by entering the following command:

ciscoasa(config-pmap)# class class_map_name ciscoasa(config-pmap-c)#

•Specify traffic directly in the policy map using one of the match commands described in Step 3. If you use a match not command, then any traffic that does not match the criterion in the match not command has the action applied.

b.Specify the action you want to perform on the matching traffic by entering the following command:

ciscoasa(config-pmap-c)# {[drop [send-protocol-error]

drop-connection [send-protocol-error]mask reset] [log] rate-limit message_rate}

Not all options are available for each match or class command. See the CLI help or the command reference for the exact options available.

The drop keyword drops all packets that match.

The send-protocol-errorkeyword sends a protocol error message.

The drop-connectionkeyword drops the packet and closes the connection.

The mask keyword masks out the matching portion of the packet.

The reset keyword drops the packet, closes the connection, and sends a TCP reset to the server and/or client.

The log keyword, which you can use alone or with one of the other keywords, sends a system log message.

The rate-limitmessage_rate argument limits the rate of messages.

You can specify multiple class or match commands in the policy map. For information about the order of class and match commands, see the “Defining Actions in an Inspection Policy Map” section on page 2-4.

Step 7 To configure parameters that affect the inspection engine, perform the following steps:

a.To enter parameters configuration mode, enter the following command:

ciscoasa(config-pmap)# parameters ciscoasa(config-pmap-p)#

b.To restrict usage on reserve port for media negotiation, enter the following command:

ciscoasa(config-pmap-p)# reserve-port-protect

c.To set the limit on the URL length allowed in the message, enter the following command:

Cisco ASA Series Firewall CLI Configuration Guide

ASA 5555-X, and the ASA Services Module, 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 manual 11-17, Ciscoasaconfig# policy-map type inspect rtsp policymapname

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

ciscoasa(config)# policy-map type inspect rtsp policy_map_name

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