Router With Nat, No Firewall - Polycom ViaVideo Technical Reference

Chapter 3

Router With NAT, No Firewall

ViaVideo Technical Reference
1. Select the Direct Connection to Network option on the
Firewall/Lan Connection screen (System
Info>Setup>Lan&Internet>Firewall/LAN Connection).
2. Enter your PC's external IP address in the External IP Address
field.
You can enter the address manually, or let ViaVideo enter it
automatically by selecting the Auto Discover IP Address
option. When you select Auto Discover IP Address, ViaVideo
automatically discovers your external IP address and enters it in
the External IP Address field.
Because of the limited bandwidth available with DSL and cable
networks, it is recommended that you select a lower line speed, such
as 128, for most calls. Select line speeds in the Dialing Speeds
screen (System Info>Setup>H.323>Dialing Speeds).
If you are using a router with Network Address Translator (NAT)
software, you need to configure ViaVideo to use the external IP
address provided by your NAT. For more information on NATs, see
"What's a NAT?" on page 19.
To configure ViaVideo to use your router's NAT:
1. Go to the Firewall/Lan Connection screen (System
Info>Setup>Lan&Internet>Firewall/LAN Connection).
2. Select the Using a NAT option.
Note When you select the Using a NAT option, you will not be
able to make video calls from the PC running ViaVideo to
other PCs in your local area network. To make calls to other
PCs in your local area network, de-select the Using a NAT
option. You can re-select this option at any time to re-enable
exterior video calling.
3. Enter your NAT's external IP address in the External IP
Address field.
10
Network Connection
www.polycom.com