Chapter 16 Using the Cisco Unified Communication Wizard

Configuring the Phone Proxy by using the Unified Communication Wizard

Note Any configuration created by the wizard should be maintained through the wizard to ensure proper synchronization. For example, if you create a phone proxy configuration through the UC wizard and then modify the configuration outside of the wizard, the rest of the wizard configuration is not updated, and the wizard configuration is not synchronized.

Therefore, if you choose to change some part of the phone proxy configuration outside of the wizard, it is your responsibility to keep the rest of the configuration in synchronization.

The wizard guides you through four steps to configure the Phone Proxy:

Step 1 Select the Phone Proxy option.

Step 2 Specify settings to define the Cisco Unified Communications Manager (UCM) servers and TFTP servers, such the IP address and the address translation settings of each server, and the Cisco UCM cluster security mode. See Configuring the Private Network for the Phone Proxy, page 16-5and Configuring Servers for the Phone Proxy, page 16-6.

Step 3 If required, enable Certificate Authority Proxy Function (CAPF). See Enabling Certificate Authority Proxy Function (CAPF) for IP Phones, page 16-8.

Step 4 Configure the public IP phone network, such as address translation settings for remote IP phones, whether to enable service setting for IP phones, and the HTTP proxy used by the IP phones. Configuring the Public IP Phone Network, page 16-9

Step 5 Specify the media termination address settings of the Cisco UCM. Configuring the Media Termination Address for Unified Communication Proxies, page 16-10.

The wizard completes by displaying a summary of the configuration created for Phone Proxy.

Configuring the Private Network for the Phone Proxy

The values that you specify in this page configure the connection from the ASA to the Cisco UCMs and TFTP servers by creating the necessary address translation settings and access control list entries.

Additionally, you specify the security mode for the Cisco UCM cluster. In a nonsecure cluster mode or a mixed mode where the phones are configured as nonsecure, the phone proxy behaves in the following ways:

•The TLS connections from the phones are terminated on the ASA and a TCP connection is initiated to the Cisco UCM.

•SRTP sent from external IP phones to the internal network IP phone via the ASA is converted to RTP.

In a mixed mode cluster where the internal IP phones are configured as authenticated, the TLS connection is not converted to TCP to the Cisco UCM but the SRTP is converted to RTP.

In a mixed mode cluster where the internal IP phone is configured as encrypted, the TLS connection remains a TLS connection to the Cisco UCM and the SRTP from the remote phone remains SRTP to the internal IP phone.

Step 1 From the Interface drop-down list, choose the interface on which the ASA listens for the Cisco UCM servers and TFTP servers. The Cisco UCM servers and TFTP servers must reside on the same interface.

Cisco ASA Series Firewall ASDM Configuration Guide

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Cisco Systems ASA Services Module, ASA 5505, ASA 5545-X, ASA 5580 Configuring the Private Network for the Phone Proxy, 16-5
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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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