VT2400/VT2500 Series Voice Gateway User Guide
45
Overview Installation Troubleshooting
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FAQ
Specifications Glossary License
Configuration:
Basic Advanced TCP/IP Wireless
Public IP
Enter the public IP address for the Port Forwarding service Note: An Internet user must
know this External (public) WAN Interface IP address in order to access any Port
Forwarding entry you define on the private LAN.
Sets the public LAN IP address for the port forwarding page. An internet user must know
the public IP address to access any port forwarding entry you defined on the private LAN.
Use External interface
IP address
Select this option if you are using an external
(does this mean dynamically assigned
addressing?)
interface IP address.
Use this IP address
Select this option if you are using a static IP address, then type the address in the field
provided.
Enable PAT
(Port Address
Translation)
Select this box to enable the port forwarding entries to be accessed through network
address translation (NAT).
Notes:
The most common form of address translation between public and private IP addresses is
NAT. This represents a mapping of one public IP address to many private IP addresses.
Using NAT, you can support up to 253 clients on your private LAN.
If NAT is disabled, then the voice terminal DHCP server is also disabled. In this case, none
of the client devices on your private internal LAN will be assigned an IP address from the
voice terminal DHCP server. Instead, your clients are treated as passthrough devices, and
if they are configured to use DHCP, they will attempt to obtain a public IP address from
your ISP.
Local Port
Add (button)
Click
Add
to save this virtual server to the PORT FORWARDING list. The configured
port(s) appear on the
Gateway > PORT FORWARDING — status
page.
Gateway > PORT FORWARDING — config page fields (continued)
Field
Description