Deployment Scenario 2: Public VoIP Service

The Public VoIP Service deployment uses a VoIP service provider, which maintains the VoIP server (either a SIP Proxy Server or H.323 Gatekeeper). The SonicWall security appliance public IP address provides the connection from the SIP Proxy Server or H.323 Gatekeeper operated by the VoIP service provider. The following figure shows a public VoIP service topology.

Public VoIP Service Topology

For VoIP clients that register with a server from the WAN, the SonicWall security appliance automatically manages NAT policies and access rules. The SonicWall security appliance performs stateful monitoring of registration and permits incoming calls for clients while they remain registered. No configuration of clients is required. See the “Using the Public Server Wizard” section for information on configuring this deployment.