Cisco Systems OL-14619-01 manual Using Firewalls with Cisco Unity

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Chapter 3 Network Infrastructure Requirements

Using Firewalls with Cisco Unity

during installation. If Cisco Unity subscribers are homed on servers other than the partner Exchange server or the Domino mail drop server, all voice messages from outside callers pass through the partner server or the mail drop server on their way to the home servers for Cisco Unity subscribers.

When the partner Exchange server, the mail drop Domino server, or a message store server on which Cisco Unity subscribers are homed is unavailable, Cisco Unity functionality is affected in the following ways:

Messages from outside callers are stored on the Cisco Unity server in the Unity Message Repository (UMR), and can be retrieved during the outage. However, voice messages that were previously received by subscribers are not available until the home server is back online.

When the home server of a calling subscriber is down, any messages from that subscriber are stored on the Cisco Unity server in the UMR, and can be retrieved by the recipient during the outage.

Message waiting indicators and message notification will not work.

Tip Make sure that the importance of message store availability is clearly understood prior to installing one

or more Cisco Unity servers, particularly those that service message stores on separate servers.

Using Firewalls with Cisco Unity

Revised May 6, 2008

Cisco Unity can coexist with firewalls. However, note that Cisco Unity should never be deployed outside of a firewall. Doing so can expose the Cisco Unity server to unwanted intrusion from the Internet, even if the server is hardened.

For detailed firewall requirements, see the following sections in the System Requirements for

Cisco Unity at

http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_installation_guides_list.html:

“Network Requirements”

“Failover Requirements for Separating Cisco Unity Servers by a Firewall”

“Standby Redundancy Requirements for Separating Cisco Unity Servers by a Firewall”

Sizing and Scaling Cisco Unity Servers

When sizing a Cisco Unity server, follow these guidelines:

Maximum Number of Users on Dedicated Domino or Exchange Servers, page 3-4

Storage Capacity for Voice Messages, page 3-4

Number of Voice Ports, page 3-4

For a list of servers that meet Cisco Unity specifications, see the Cisco Unity Supported Platforms List at http://cisco.com/en/US/products/sw/voicesw/ps2237/products_data_sheets_list.html.

Design Guide for Cisco Unity Release 5.x

 

OL-14619-01

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Contents Americas Headquarters Design Guide for Cisco UnityDesign Guide for Cisco Unity Release N T E N T S Workstations Authentication Centralized Voice Messaging Configuration Viii Document Conventions AudienceSupport Policy for Optional Third-Party Software Cisco Product Security Overview Xii Design Guide Overview Product Area Design or Feature DocumentationDesign Guide for Cisco Unity Bridge at Page Design Guide Overview Design Guide for Cisco Unity Release How Cisco Unity Works Cisco Unity ConceptsVoice Messaging Unified MessagingHardware Components of a Cisco Unity System Cisco Unity Supported Platforms List at One or More Cisco Unity ServersNetwork Connection Optional for Some Configurations Software Components of a Cisco Unity System Where Cisco Unity Stores DataVoice Messages Are Stored in Domino or Exchange DominoExchange Enabling Cisco Unity Servers to Communicate with One Another Networking Guide for Cisco Unity at Some Configuration Settings Are Stored in the Registry Availability of Network Resources Name ResolutionAvailability of Message Store Servers Domain Controller Access and AvailabilitySizing and Scaling Cisco Unity Servers Using Firewalls with Cisco UnityNumber of Voice Ports Storage Capacity for Voice MessagesHow Codecs Affect the File Size of Voice Messages Audio CodecsInteroperability Among Multiple Voice-Messaging Systems TTS, TTY, Pocket PCs, and Hand-Held ComputersAudio Codec Quality RatingDeployment Models Unified Messaging with Customer-Provided Infrastructure Multi-Site WAN with Distributed Messaging Voice Messaging with Customer-Provided InfrastructurePhysical Placement and Network Infrastructure Active Directory Considerations Considerations for Customer-Provided InfrastructureDesign Guide for Cisco Unity Release Exchange Considerations All Versions Exchange Considerations That Apply Only Exchange Considerations for Cisco-Provided, Dedicated Infrastructure OL-14619-01 Overview of Cisco Unity with Domino and Notes Domino Address Book Terminology Maximum Number of Cisco Unity SubscribersElement Name Changes That csAdmin Makes to the Domino Address BookChanges That csClient Makes to the Mail File Windows Domains and Domino Domains Server PlacementActive Directory Accounts and Permissions AuthenticationDomino Clusters Domino PermissionsCisco Unity Subscribers and Domino Users Cisco Unity and the Domino Address Book Client Access LicensesMessage Routing Backing Up and Restoring DataServers Requirements and Recommendations Unified Messaging ConfigurationsUnified Messaging, No Domino Cluster Unified Messaging, Domino Cluster Voice Messaging ConfigurationCriteria for a Supported Configuration Deploying Cisco Unity for Lotus Domino Network Services Administrative Access and ControlDeployment Tasks for Unified Messaging Configurations Establishing Support PoliciesOperational Tasks Design Guide for Cisco Unity Release Overview Integrating Cisco Unity with the Phone SystemHow an Integration Works Digital Integration with Digital Pimg Units Lines and Cables to Make Physical ConnectionsIntegration with Cisco Unified Communications Manager Dtmf Integration with Analog Pimg Units LAN/WAN Timg IntegrationSerial Integration with Voice Cards Dtmf Integration with Voice CardsConnections for a Serial Integration by Using Voice Cards Settings in the Phone System and in Cisco UnityCall Control General Integration Issues Sccp SIP FeatureIntegrating Cisco Unity with the Phone System Option Considerations Description Cisco Unified Communications Manager Security FeaturesDescription Setting Effect When Data Is EncryptedDisabling and Re-Enabling Security Settings for Individual Voice Messaging PortsPacketization Sccp Integrations Only Sccp SIP Cisco 11 Cisco Unified Communications Manager Fallback with Pstn Cisco Unity to a branch office will fail Integrating by Using SIP SIP Compliance Supported SIP IntegrationsCisco Unity Failover with SIP Trunks Description of Pimg Integrations Dtmf Integration with Analog Pimg Units Description of Timg Integrations Firmware Updates Serial Integrations Setup and ConfigurationCisco Unity Failover Increasing Port CapacityMultiple Integration Support/Branch Office Consolidation Cisco Unity FailbackIntegrating with Multiple Phone Systems Requirements for Integrations with Multiple Phone Systems Using Sccp Phone Systems with Other IntegrationsAlternate Extensions Optional Integration FeaturesReasons to Use Alternate Extensions How Alternate Extensions WorkMWIs for Extensions on a Non-Integrated Phone System Alternate MWIsCentralized Voice Messaging OL-14619-01 OL-14619-01 Failover Cisco Unity Failover and Standby RedundancyStandby Redundancy Cisco Unity Failover and Standby Redundancy Cisco Unity Failover and Standby Redundancy Pstn WAN Diagram of a Standby Redundancy ConfigurationOL-14619-01 Voice-Recognition Access to Cisco Unity OL-14619-01 Migrating to Cisco Unity from Another Voice-Messaging System Migrating to Cisco Unity from Another Voice-Messaging System D E IN-2 IN-3 IN-4