Chapter 16 Using the Cisco Unified Communication Wizard

Configuring the Phone Proxy by using the Unified Communication Wizard

Selecting the Use interface IP radio button configures the server to use the IP address of the public interface. You select the public interface in step 4 of the wizard when you configure the public network for the phone proxy.

If the Use interface IP radio button is selected, you must specify port translation settings in the Voice and TFTP sections. Address-only translation is available only when you specify an IP address other than the IP address of the public interface.

When you select the Address only radio button, the ASA performs address translation on all traffic between the server and the IP phones. Selecting the Address and ports radio button limits address translation to the specified ports.

Step 5 (Unified CM or Unified CM + TFTP servers only) In the Voice section, configure inspection of SIP or SCCP protocol traffic, or both SIP and SCCP protocol traffic by completing the following fields:

a.In the Translation Type field, specify whether to use the Address only or the Address and ports.

When the deployment has redundant Cisco UCM servers and dedicated servers for TFTP and CAPF services, select Address only for voice address translation.

Select the Address and ports option when you want to limit address translation to the specified ports.

b.In the Voice Protocols field, select the inspection protocols supported by the IP phones deployed in the enterprise. Depending on which inspection protocols you select—SCCP, SIP, or SCCP and SIP—only the ports fields for the selected voice protocols are available.

c.In the Port Translation section, enter the private and public ports for the voice protocols.

The default values for the voice ports appear in the text fields. If necessary, change the private ports to match the settings on the Cisco UCM. The values you set for the public ports are used by the IP phones to traverse the ASA and communicate with the Cisco UCM.

The secure SCCP private port and public port are automatically configured. These port numbers are automatically set to the value of the non-secure port number plus 443.

Step 6 (TFTP or Unified CM + TFTP servers only) In the TFTP section, you can select either Address only or Address and port for address translation. Cisco recommends that you specify Address and port for increased security. Specifying Address and port configures the TFTP server to listen on port 69 for TFTP requests.

When the server type is Unified CM + TFTP, the wizard configures the same type of address translation for Voice and TFTP; for example, when the server type is Unified CM + TFTP and the Address only option is selected, the wizard creates a global address translation rule for all traffic to and from the server. In this case, configuring port translation for the TFTP server would be redundant.

Step 7 Click OK to add the server to the phone proxy configuration and return to step 2 of the wizard.

Enabling Certificate Authority Proxy Function (CAPF) for IP Phones

As an alternative to authenticating remote IP phones through the TLS handshake, you can configure authentication via locally significant certificate (LSC) provisioning. With LSC provisioning, you create a password for each remote IP phone user and each user enters the password on the remote IP phones to retrieve the LSC.

Because using LSC provisioning to authenticate remote IP phones requires the IP phones first register in nonsecure mode, Cisco recommends LSC provisioning be done inside the corporate network before giving the IP phones to end-users. Otherwise, having the IP phones register in nonsecure mode requires the Administrator to open the nonsecure signaling port for SIP and SCCP on the ASA.

Cisco ASA Series Firewall ASDM Configuration Guide

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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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