Chapter 18 Configuring the TLS Proxy for Encrypted Voice Inspection

TLS Proxy

TLS Proxy

This feature is supported only for ASA versions 8.0.x prior to 8.0.4 and for version 8.1.

Note This feature is not supported for the Adaptive Security Appliance versions prior to 8.0.4 and for version 8.1.2.

Use the TLS Proxy option to enable inspection of SSL encrypted VoIP signaling, namely Skinny and SIP, interacting with Cisco CallManager.

The TLS Proxy pane lets you define and configure Transaction Layer Security Proxy to enable inspection of encrypted traffic.

Fields

•TLS Proxy Name—Lists the TLS Proxy name.

•Server—Lists the trustpoint, which is either self-signed or enrolled with a certificate server.

•Local Dynamic Certificate Issuer—Lists the local certificate authority to issue client or server dynamic certificates.

•Local Dynamic Certificate Key Pair—Lists the RSA key pair used by client or server dynamic certificates.

•Add—Adds a TLS Proxy.

•Edit—Edits a TLS Proxy.

•Delete—Deletes a TLS Proxy.

•Maximum Sessions—Lets you specify the maximum number of TLS Proxy sessions to support.

–Specify the maximum number of TLS Proxy sessions that the ASA needs to support. By default, ASA supports 300 sessions.—Enables maximum number of sessions option.

–Maximum number of sessions:—The minimum is 1. The maximum is dependent on the platform. The default is 300.

Add/Edit TLS Proxy

Note This feature is not supported for the Adaptive Security Appliance versions prior to 8.0.4 and for version 8.1.2.

The Add/Edit TLS Proxy dialog box lets you define the parameters for the TLS Proxy.

Fields

•TLS Proxy Name—Specifies the TLS Proxy name.

•Server Configuration—Specifies the proxy certificate name.

–Server—Specifies the trustpoint to be presented during the TLS handshake. The trustpoint could be self-signed or enrolled locally with the certificate service on the proxy.

•Client Configuration—Specifies the local dynamic certificate issuer and key pair.

–Local Dynamic Certificate Issuer—Lists the local certificate authority to issue client or server dynamic certificates.

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Cisco Systems ASA 5505, ASA 5545-X, ASA 5555-X, ASA 5585-X, ASA 5580, ASA Services Module manual Add/Edit TLS Proxy, 18-16
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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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