Vigor2912 Series User’s Guide
156
Protocol
Specify the transport layer protocol. It could be TCP, UDP, or
ALL for selection.
WAN Interface
Choose the WAN interface for such address mapping profile.
WAN IP
This is the source IP of a packet captured on the WAN side and
sent by a NAT host specified in the Private IP field.
The drop down menu contains WAN interface IPs and WAN
IP alias IPs.
Private IP
This is the source IP of a NAT host which wishes to send
packets to the WAN side and have source address as
configured in the WAN IP field.
Subnet Mask
Select a value of subnet mask for private IP address.
After finishing all the settings here, please click OK to save the configuration.
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Port Triggering is a variation of open ports function.
The key difference between "open port" and "port triggering" is:
z Once the OK button is clicked and the configuration has taken effect, "open port"
keeps the ports opened forever.
z Once the OK button is clicked and the configuration has taken effect, "port triggering"
will only attempt to open the ports once the triggering conditions are met.
z The duration that these ports are opened depends on the type of protocol used. The
"default" durations are shown below and these duration values can be modified via
telnet commands.
TCP: 86400 sec.
UDP: 180 sec.
IGMP: 10 sec.
TCP WWW: 60 sec.
TCP SYN: 60 sec.
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