ZyXEL Communications 2000W manual NAT Traversal Configuration, Stun, Outbound Proxy

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Prestige 2000W_V2 User’s Guide

12.12.3 STUN

STUN (Simple Traversal of User Datagram Protocol (UDP) through Network Address Translators) allows the Prestige to find the presence and types of NAT routers and/or firewalls between it and the public Internet. STUN also allows the Prestige to find the public IP address that NAT assigned, so the Prestige can embed it in the SIP data stream. STUN does not work with symmetric NAT routers (see Section 12.11.2.4 on page 85) or firewalls. See RFC 3489 for details on STUN.

The following figure shows how STUN works.

1The Prestige (A) sends SIP packets to the STUN server.

2The STUN server finds the public IP address and port number that the NAT router used on the Prestige’s SIP packets and sends them to the Prestige.

3The Prestige uses the public IP address and port number in the SIP packets that it sends to the SIP server.

Figure 26 STUN

12.12.4 Outbound Proxy

Your VoIP service provider may host a SIP outbound proxy server to handle all of the Prestige’s VoIP traffic. This allows the Prestige to work with any type of NAT router and eliminates the need for STUN or a SIP ALG. Turn off a SIP ALG on a NAT router in front of the Prestige to keep it from retranslating the IP address (since this is already handled by the outbound proxy server).

12.13 NAT Traversal Configuration

Click NAT TRVSL to open the following screen where you can configure your Prestige to operate through a NAT router that is not SIP-friendly.

The following screen displays the IP address and port number of an outbound proxy server the Prestige uses to connect to the outbound proxy server.

Chapter 12 User Web Configurator Screens

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Contents Prestige 2000WV2 Page Prestige 2000WV2 User’s Guide CopyrightDisclaimer TrademarksCertifications Federal Communications Commission FCC Interference StatementSafety Warnings Safety WarningsZyXEL Limited Warranty ZyXEL Limited WarrantyCustomer Support Customer SupportUnited Kingdom Table of Contents Chapter Network Settings Chapter Information Menus Appendix a Product Specifications 107 Appendix B Appendix C Prestige 2000WV2 User’s Guide Table of Contents List of Figures List of FiguresPeer-to-Peer Communication in an Ad-hoc Network 119 List of Tables List of TablesEight Subnets Syntax Conventions PrefaceAbout Your Prestige Related DocumentationGraphics Icons Key User Guide FeedbackGetting To Know Your Prestige FeaturesPlace a Call via SIP Proxy Server SIP Call Server ApplicationsDirect IP to IP Calling Ad-Hoc Wireless IntercomPrestige Hardware Descriptions Getting to Know the Prestige HardwarePrestige 2000WV2 User’s Guide Prestige 2000WV2 User’s Guide Getting To Know Your Prestige Using the LCD Screen Menus Using the LCD Screen MenusLCD Main Screen Navigating the LCD Screen Menus Text InputPrestige 2000WV2 User’s Guide LCD Main Screen Press the OK key when you are done Prestige 2000WV2 User’s Guide Using the LCD Screen Menus Select Site Survey Wireless LAN Setup MenusWireless LAN Setup Menus Site SurveyArrow to highlight it and then press the Left key Network ModeSelect Wireless in the first menu screen use the up or down SsidChannel Select Network ModeWEP Encryption RateSelect Key Select Authentication TypeProfiles WEP for encryption, not for authenticationCreate Prestige 2000WV2 User’s Guide Wireless LAN Setup Menus Select IP Address Network SettingsNetwork Settings Fixed IPSelect Subnet Mask DhcpPPPoE Select PPPoE Pwd Select PPPoE NameSelect Registrar Select Registrar IP SIP SettingsSIP Settings Registrar ServerOutbound Proxy Server Select Expiry TimeSelect Outbound Proxy Select Proxy Server Proxy ServerSelect User Account Select Phone Number User AccountSelect User Pwd Prestige 2000WV2 User’s Guide SIP Settings Phonebook PhonebookCalling Methods Adding a Phonebook EntrySelect Add Entry Editing Phonebook EntriesErasing Phonebook Entries Select Speed Dial Speed Dial Phonebook EntriesCall History Missed CallsCall History Received Calls Erasing Calls Dialed CallsSelect Erase Calls Miscellaneous Settings Setting the Ring MelodyMiscellaneous Settings Setting the Vibration Mode Adjusting the Ring VolumeSelect Ringer Volume Select Edit Date Setting the TimeSetting the Date Select Edit TimePress the Left key to save your setting Setting the BannerSetting the Key Lock Select Settings in the first menu screenSelect Don’t Disturb Setting the Don’t DisturbPrestige 2000WV2 User’s Guide Miscellaneous Settings Information Menus Information MenusDisplaying Information Select MAC Address11Select Firmware Ver Dialing a Telephone Number Using the Phonebook to Dial a Telephone NumberUsing Speed Dial to Dial a Telephone Number Prestige UsageChanging the Volume Answering a CallRejecting a Call Using the Web Configurator Screens Using the Web Configurator ScreensIntroduction to the Web Configurator LoginLogin Screen Navigating the Prestige Web ConfiguratorPhone Book Web Configurator User Screens SummarySIP NAT TrvslWeb Configurator Administrator Screens Summary PhoneTOS/DS IP Address Assignment User Web Configurator ScreensUser Web Configurator Screens Device InformationMAC Address IP Address and Subnet MaskDNS Server Network Configuration StaticNetwork Configuration Dhcp CancelApply Dhcp PPPoE Network Configuration Network Configuration PPPoEPPPoE VoIP Introduction12.9.1 SIP SIP IdentitiesInvite SIP Call ProgressionSIP Client Server SIP Call ProgressionSIP Proxy Server 12.9.1.4 RTP SIP ConfigurationSIP Proxy 12.11 NATNAT Types NAT ExampleFull Cone Restricted Cone Port Restricted Symmetric Full Cone NATFull Cone NAT Example Restricted Cone NATSymmetric NAT Port Restricted Cone NATNAT and SIP SIP ALGFake WAN Address on SIP and RTP NAT Traversal Configuration StunOutbound Proxy ALG NAT Traversal ConfigurationStun Phone Book ConfigurationPhone Book Calling MethodsDelete PhonebookPrestige 2000WV2 User’s Guide Phonebook Wireless IntroductionWireless Settings WEP EncryptionWEP Ssid12.19 S/W Update SystemSubmit Zip files before you can upload them W UpdateAdministrator Web Configurator Screens Administrator Web Configurator ScreensType the SIP proxy server settings SIP Proxy ConfigurationSIP URI SIP ConfigurationPrestige 2000WV2 User’s Guide IP Configuration Voice Coding13.3.1 G.711 Pstn Call Setup Signaling Phone Setting13.3.2 G.729 100 Administrator Web Configurator Screens Administrator Web Configurator Screens 101 Quality of Service102 Administrator Web Configurator Screens 13.8 ToSIntroduction to DiffServ Troubleshooting Problems Starting Up the PrestigeProblems Using the Keypad Problems Accessing the Prestige Troubleshooting Accessing the Prestige104 Troubleshooting Troubleshooting 105 Error Message TroubleshootingRestoring the Factory Default Settings Error Message TroubleshootingPrestige 2000WV2 User’s Guide 106 Troubleshooting MIC Specification TablesHardware Specifications Appendix a Product Specifications 107Essid Prestige 2000WV2 User’s Guide Firmware Features108 Appendix a Product Specifications HTTP, TFTP, TCP, UDP, DNS, ARP, IcmpAppendix B IP Subnetting 109 IP AddressingIP Classes Classes of IP AddressesNatural Masks Subnet MasksSubnetting Allowed IP Address Range By ClassAppendix B IP Subnetting 111 Example Two SubnetsAlternative Subnet Mask Notation Two Subnets Example112 Appendix B IP Subnetting SubnetAppendix B IP Subnetting 113 Example Four Subnets114 Appendix B IP Subnetting Example Eight SubnetsEight Subnets Class C Subnet PlanningSubnetting With Class a and Class B Networks Class B Subnet PlanningAppendix B IP Subnetting 115 Prestige 2000WV2 User’s Guide 116 Appendix B IP Subnetting Appendix C PPPoE 117 PPPoE in ActionBenefits of PPPoE Traditional Dial-up ScenarioPrestige as a PPPoE Client How PPPoE WorksWireless LAN Topologies Ad-hoc Wireless LAN ConfigurationAppendix D Wireless LANs 119 120 Appendix D Wireless LANs Basic Service SetInfrastructure Wlan Appendix D Wireless LANs 121Prestige 2000WV2 User’s Guide 122 Appendix D Wireless LANs Dtmf IndexNumerics Index 123711 22, 98 729 22, 99 124 IndexIndex 125 SIP ALG 126 IndexWlan Index 127

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