SonicWALL TZ 190 Manuale Utente

This deployment does not require a VoIP server. The Public IP address of the SonicWALL 
security appliance is used as the main VoIP number for hosts on the network. This requires a 
static Public IP address or the use of a Dynamic DNS service to make the public address 
available to callers from the WAN. Incoming call requests are routed through the SonicWALL 
security appliance using NAT, DHCP Server, and network access rules. 

To make multiple devices behind the SonicWALL security appliance accessible from the public 
side, configure one-to-one NAT. If many-to-one NAT is configured, only one SIP and one NAT 
device will be accessible from the public side. See “

” for more information on NAT.

See the “

” section for information on configuring this deployment.

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