Motorola VT2442 用户手册
VT2442 Voice Gateway User Guide
29
Custom Port Forwarding
You can create up to 20 custom port forwarding entries to support specific services or applications, such as
concurrent NAT/NAPT operation.
concurrent NAT/NAPT operation.
Custom Port Forwarding fields
Field
Description
Enable
The check box is selected by default and automatically applies when you click Apply.
Application
The name of the application for which ports are opened.
Protocol
Can be TCP, UDP and TCP, or UDP.
Source IP Address
Sets the source IP address from which incoming traffic is allowed.
Source Netmask
Sets a subnet mask used in conjunction with the Source IP Address to set a range of IP
addresses. Enter 0.0.0.0 for all.
addresses. Enter 0.0.0.0 for all.
Destination IP Address The LAN’s destination IP address for incoming traffic.
Destination Netmask
Subnet mask used in conjunction with the Destination IP Address to set a range of IP
addresses. The default is 255.255.255.255.
addresses. The default is 255.255.255.255.
Destination Port Start
The starting port number that is opened for this application.
Destination Port End
The ending port number that is opened for this application.
Destination Port Map
Destination port mapped on the LAN (destination) side to which packets are forwarded.
There are two types of port mapping:
There are two types of port mapping:
• One-to-one (one port mapped to one) (WAN = 500 to 600; LAN = 500 to 600)
• Multiple-to-one (several ports mapped to one) (WAN = 500 to 600; LAN = 700)
Wildcard (*) entries are allowed for the IP Address, Netmask, and Port range fields.