What’s a Firewall? | Polycom ViaVideo manual

Appendix

Network Connection

ViaVideo presents the Multiple IP Addresses screen.,

Chose the IP address of your VPN connection and restart the application.

Once the ViaVideo application re-starts, ViaVideo uses the IP address you specified. This address is displayed in the System Information screen, at the bottom of the application window, and in your address book user information.

What’s a Firewall?

A firewall acts as a security barrier between one network and another. Usually the barrier is erected between an interior network, such as a Small Office Home Office (SOHO) network, and an exterior network, such as the internet.

Firewall services are provided as part of the configuration software with most SOHO - quality routers, such as Linksys® and Cisco®. You can also run a firewall independent of your router by using one of the popular software-only firewall packages, such as Black Ice, Norton® Firewall, and McAfee® Firewall.

With either type of firewall, the task of setting up a video communications connection with the outside world encounters the same problem: firewalls provide security for your network by putting

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Polycom ViaVideo manual What’s a Firewall?

Contents

ViaVideo User’s Guide Page Warranty Other RestrictionsTrademark Information Patent Information Important Safeguards Regulatory Notices FCC NoticeUnderwriters’ Laboratories’ Statement RADVision Statement Contents Network Connection System Information and DiagnosticsAudio Connection Troubleshooting Contents ViaVideo User’s Guide Viii System Requirements and Installation Hardware Requirements Software Requirements Installing SoftwareInstalling Hardware Starting ViaVideo Turn on the Camera Initial Setup ViaVideo built-in microphone Headset with microphone Camera Calibration Using Manual DialingPlacing a Call Info icon Call status light IP address Chapter Using the Address Book or Speed Dialing New entry Edit entry Delete entry On-Screen Remote Control Ending a Call Answering Calls Closing ViaVideo Chapter Using ViaVideo Calling Features Using the Remote Control Hang Up Audio Mute VolumeSnapshot Information Screen Access Window ControlsPicture in Picture PIP Minimize Window Re-Size the ViaVideo Display Sending Snapshots Leaving a Callback Message Using the Address Book Address Book and Speed Dial Do This Local and Global Address Book Entries Local Entries Global ILS Server Entries Display Global Address Go to the Directory Services screenRegister This System When Powered On Lock Using Speed DialDelete All Controlling Audio and Video Controlling AudioVia the On-Screen Remote Dial Via the Audio Screen Muting Video Mute Auto Answer Calls in the Audio screen System Chapter Collaboration and Application Sharing Multiple IP Addresses Chapter System Information and Diagnostics Using the System Information Screens System Information and Diagnostics Diagnostics Network Statistics Video Jitter Advanced StatisticsAudio Jitter Call Status Reset System Camera Calibration Generate Tone Setup Auto Start ViaVideo When Auto Start ViaVideo is selected General323 Auto Answer Show Half-Size Display When Show Half-Size Display is Show AnimationsUser Name Mail Directory Services Display Global Addresses Register this system when starting ViaVideoLAN and Internet Wins Resolution Default GatewayHost Name IP Address Audio Volume Control Master VolumeWave Volume Line ViaVideo Software SoftwarePC Software Dialing Speeds SetupGatekeeper 323 Display IP Dialing Extension Multiple IP Addresses Gatekeeper Dialing Speeds Quality of Service and Firewalls Use Fixed Ports Auto discover NAT IP address NAT outside WAN addressIP Precedence Dynamic Bandwidth Chapter Audio Connection PC with Speakers PC with Headphones Headphones Only Headset with Attached Microphone Pick Your Connection Type Simple Connection Just a Modem, Thanks Router With Firewall Router With Firewall, Using a DMZRouter With NAT, No Firewall Configure Your Connection Through a Virtual Private Network Select the System is Behind a NAT option Configure your ViaVideo for NATWhen you select Auto discover NAT IP Address, ViaVideo Open and Assign Ports in the Firewall System Information screen Router With Firewall, Using a DMZ Assign your ViaVideo to the DMZ Through a Virtual Private Network Appendix What’s a Firewall? Is it Safe? Opening PortsPort Number Assignation What’s a DMZ? What’s a Network Address Translator? Appendix General Troubleshooting Problem Explanation Solution Audio Troubleshooting InfoDiagnosticsGenerate Volume Controls Wave, and Master Video Troubleshooting Windows Control Panel InfoSetupH.323QOS Bandwidth option Error Messages Installation ErrorsErrors Error Message Explanation Solution Gatekeeper setting SetupH.323 Appendix C