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ZyXEL Communications P2000W manual NAT Traversal Configuration, Stun, Outbound Proxy

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P-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 87) 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	89
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ZyXEL Communications P2000W manual NAT Traversal Configuration, Stun, Outbound Proxy

Contents

2000WV2 Page Disclaimer CopyrightTrademarks 2000WV2 User’s GuideSales@voipon.co.uk Tel +44 01245 Fax +44 01245 Certifications2000WV2 User’s Guide Safety Warnings Safety WarningsZyXEL Limited Warranty Customer Support Customer SupportUnited Kingdom Page Table of Contents Chapter Network Settings 10.1 Appendix a Appendix C Page List of Figures Prestige as a PPPoE Client List of FiguresList of Tables List of Tables About Your Prestige PrefaceRelated Documentation Syntax ConventionsPreface Graphics Icons KeyQoS Quality of Service FeaturesGetting To Know Your Prestige Dynamic Jitter BufferPlace 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 Hardware2000WV2 User’s Guide Prestige Hardware Descriptions Page LCD Main Screen Using the LCD Screen MenusNavigating the LCD Screen Menus Using the LCD Screen MenusText Input 2000WV2 User’s Guide LCD Main ScreenPress the OK key when you are done Page Wireless LAN Setup Menus Tel +44 01245 808195 Fax +44 01245 Wireless LAN Setup MenusSite Survey Select Site SurveySelect Wireless in the first menu screen use the up or down Network ModeWireless LAN Setup Menus SsidChannel Select Network ModeWEP Encryption RateSelect Key Select Authentication TypeProfiles Create Page Select IP Address Network SettingsFixed IP Select Subnet Mask Network SettingsDhcp Select PPPoE Name PPPoESelect PPPoE Pwd Clear the PPPoE password and enter your’sSelect Registrar Select Registrar IP SIP SettingsRegistrar Server Select Outbound Proxy SIP SettingsOutbound Proxy Server Select Proxy Server Proxy ServerSelect User Account Select Phone Number User AccountUsername Page Calling Methods PhonebookAdding a Phonebook Entry Select Phonebook in the first menuPhonebook Editing Phonebook EntriesErasing Phonebook Entries Select Speed Dial Speed Dial Phonebook EntriesMissed Calls Call HistoryCall History Received CallsErasing Calls Dialed CallsSelect Erase Calls Miscellaneous Settings Tel +44 01245 808195 Fax +44 01245 Miscellaneous SettingsSetting the Ring Melody Adjusting the Ring Volume Setting the Vibration ModeSelect Ringer Volume Miscellaneous SettingsSetting the Date Setting the TimeSelect Edit Time Select Edit DateSetting the Key Lock Setting the BannerSelect Settings in the first menu screen Press the Left key to save your settingSelect Don’t Disturb Setting the Don’t DisturbPage Displaying Information Information MenusInformation Menus Select Firmware VerUsing Speed Dial to Dial a Telephone Number Using the Phonebook to Dial a Telephone NumberPrestige Usage Dialing a Telephone NumberAnswering a Call Changing the VolumeRejecting a Call Prestige UsageIntroduction to the Web Configurator Using the Web Configurator ScreensLogin AccountsUsing the Web Configurator Screens Navigating the Prestige Web ConfiguratorWeb Configurator Administrator Screens Summary Web Configurator User Screens SummaryPage Device Information User Web Configurator ScreensIP Address Assignment Private IP Address RangesMAC Address User Web Configurator ScreensIP Address and Subnet Mask DNS Server Network Configuration StaticApply Network Configuration DhcpCancel Dhcp PPPoE Network Configuration Network Configuration PPPoE12.9.1 SIP VoIP IntroductionSIP Identities PPPoESIP Client Server SIP Call ProgressionSIP Call Progression InviteSIP Proxy Server 12.9.1.4 RTP SIP ConfigurationSIP Proxy 12.11 NATNAT Types NAT ExampleNAT Types Full Cone NATFull Cone NAT Example Restricted Cone NATSymmetric NAT Port Restricted Cone NATFake WAN Address on SIP and RTP NAT and SIPSIP ALG Outbound Proxy NAT Traversal ConfigurationStun ALG NAT Traversal ConfigurationPhonebook Phonebook ConfigurationCalling Methods StunClear DeleteEdit WEP Encryption Wireless IntroductionWireless Settings WEP SsidSubmit 12.19 S/W UpdateSystem Zip files before you can upload them W UpdateAdministrator Web Configurator Screens Administrator Web Configurator Screens SIP Proxy ConfigurationSIP URI SIP Configuration13.3.1 G.711 2000WV2 User’s Guide SIP ConfigurationVoice Coding 13.3.2 G.729 Pstn Call Setup SignalingPhone Setting Same codec as the Prestige System Settings Quality of ServiceIntroduction to DiffServ 13.8 ToSProblems Starting Up the Prestige TroubleshootingProblems Using the Keypad Troubleshooting the Start-Up of Your PrestigeTroubleshooting Accessing the Prestige Problems Accessing the PrestigeRestoring the Factory Default Settings Error Message TroubleshootingError Message Troubleshooting DhcpPage MIC Specification TablesHardware Specifications Essid 2000WV2 User’s Guide Firmware FeaturesHTTP, TFTP, TCP, UDP, DNS, ARP, Icmp Classes of IP Addresses IP AddressingIP Classes Subnetting Subnet MasksAllowed IP Address Range By Class Natural MasksTwo Subnets Example Example Two SubnetsAlternative Subnet Mask Notation Subnet Example Four Subnets Class C Subnet Planning Example Eight SubnetsEight Subnets Class B Subnet Planning Subnetting With Class a and Class B NetworksPage Traditional Dial-up Scenario PPPoE in ActionBenefits of PPPoE Prestige as a PPPoE Client How PPPoE WorksAd-hoc Wireless LAN Configuration Wireless LAN TopologiesESS Infrastructure Wlan RoamingRoaming Example Requirements for Roaming2000WV2 User’s Guide Page Numerics IndexIP-PBX 711 24, 100 729 24, 101PCM 100 130 Index Sales@voipon.co.uk Tel +44 01245 Fax +44 01245 Wlan