Scope:This guide will walk you through how to configure a SonicWALL as recommended for your VoIP service.Requirements:SonicWALL administrative access IP Addresses and PortsConsistent NATClick on VoIPClick on SettingsSet Enable consistent NAT to enabledEvery other checkbox on this page should be unchecked as well.Click AcceptAdvanced Firewall SettingsClick on Firewall SettingsClick on AdvancedSet Enable Stealth Mode and Randomize IP ID to disabled.Click AcceptCreate Custom VoIP ServicesUnder Network > Services click Add...Fill the popup as follows:Name: VoIP RTPProtocol: UDPPort Range: 3000 - 65000Sub Type: NoneClick AddClick on Service Groups > Add Group...Name: VOIP ServicesAdd the following services to the right boxSIPVoIP RTPClick AddCreate LAN > WAN Rule for ServicesNavigate to Firewall > Access RulesClick on MatrixClick on the arrow under LAN > WANClick on Add...Source Port: AnyService: VOIP ServicesSource: AnyDestination: Any Users Included: AllUsers Excluded: NoneSchedule: Always OnComment: QoS for VoIP PhonesEnable Logging: TrueAllow Fragmented Packets: True Click on the Advanced tabUDP Connection Inactivity Timeout (seconds): 90Create Address Group for Voice ServicesClick Firewall > Address Objects > AddFill out the following: Name: Name of the Assignment Zone Assignment: WANType: HostIP Address: IP of the ServerNOTE: Find IP Addresses and Ports hereAdd each IP Address for Voice Services as an Address ObjectCreate an Address Groupand add the address objects that were createdName: Voice ServicesExcluding Voice Services IPs under Security Services (if applicable)Click Security Services Check each Service and see if it is enabledIf so, you need to enable the Exclusion List on each service and set it to Voice ServicesExample: Content FilterOnce you exclude it, click Accept