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Figure 2-12
Inferface of system advanced configuraiton
Table 2-15
Parameters of system advanced configuration
Title
Explanation
NAT
NAT traversal
Gateways support several mechanisms for NAT traversal. Usually, static
NAT is used when fixed public IP address is available. It’s necessary to
perform port mapping or DMZ function on router when choosing
dynamic or static NAT.
Refresh period
The refresh time must be filled in here when choosing dynamic NAT or
STUN traversal. Besides, refresh time interval shall be determined by
giving consideration into the NAT refresh time of the LAN router which
the gateway is located. Gateway’s NAT holding function and STUN
function will carry out periodically operation accoding to this parameter.
With second as its unit, default value of 60 seconds.
SDP Address
This parameter determines the IP address used in transmitted SDP.
z
NAT IP Address: Apply NAT address into the transmitted SDP;
z
Local IP Address: Apply the gateway’s IP address into the transmitted
SDP.
Note: The parameter should come into effect only on condition that
gateway successfully obtained NAT address.
NAT IP address
This parameter must be filled when using static NAT traversal, in which
IAD works under LAN and the WAN address is fixed. The WAN
address should be filled in this field, which will be used in SDP. This
parameter can be set in IP address format or hostname format (note: DNS
service should be activated when hostname format is used). There is no
default value for this field.