• SonicOS and SonicOSX 7 VoIP
• VoIP
  • VoIP Security
    • Security Appliance Requirements for VoIP
  • VoIP Protocols
    • H.323
    • SIP
  • SonicWall’s VoIP Capabilities
    • VoIP Security
    • VoIP Network
    • VoIP Network Interoperability
    • Supported Interfaces
    • Supported VoIP Protocols
      • H.323
      • SIP
      • SonicWall VoIP Vendor Interoperability
      • CODECs
      • VoIP Protocols on which SonicOS/X Does Not Perform Deep Packet Inspection
    • BWM and QoS
      • Quality of Service
    • How SonicOS/X Handles VoIP Calls
      • Incoming Calls
      • Local Calls
• Settings
  • Configuring VoIP Settings
    • General Settings
    • SIP Settings
      • Enabling SIP
    • H.323 Settings
      • Configuring Bandwidth on the WAN Interface
      • Configuring VoIP Access Rules
  • Configuring VoIP Logging
• Call Status
• SonicWall Support
  • About This Document

SIP Settings

By default, SIP clients use their private IP address in the SIP (Session Initiation Protocol) Session Definition Protocol (SDP) messages that are sent to the SIP proxy. If your SIP proxy is located on the public (WAN) side of the firewall and the SIP clients are located on the private (LAN) side of the firewall, the SDP messages are not translated and the SIP proxy cannot reach the SIP clients.