ZyXEL Communications P-870H Series User Manual page 125

Only Jane can connect to the Real Audio server until the connection is closed or
5
times out. The ZyXEL Device times out in three minutes with UDP (User Datagram
Protocol) or two hours with TCP/IP (Transfer Control Protocol/Internet Protocol).
Click NAT > Trigger Port to open the following screen. Use this screen to view
and configure your ZyXEL Device's trigger port settings.
Figure 68 Trigger Port
The following table describes the labels in this screen.
Table 39 NAT Trigger Port
LABEL
Service Name
WAN Interface
Trigger Port
Start
End
Protocol
Open Port
Start
End
Protocol
Add
No.
Active
P-870H/HW Series User's Guide
DESCRIPTION
Select a pre-defined service from the drop-down list box. The pre-
defined service port number(s) and protocol will display in the Trigger
port, Open port and Protocol fields.
Otherwise, select User Define to open the Rule Setup screen where
you can manually enter the port number(s) and select the IP protocol.
Select the WAN interface through which the service is forwarded.
The trigger port is a port (or a range of ports) that causes (or triggers)
the ZyXEL Device to record the IP address of the LAN computer that sent
the traffic to a server on the WAN.
This is the first port number that identifies a service.
This is the last port number that identifies a service.
This is the IP protocol.
The open port is a port (or a range of ports) that a server on the WAN
uses when it sends out a particular service. The ZyXEL Device forwards
the traffic with this port (or range of ports) to the client computer on the
LAN that requested the service.
This is the first port number that identifies a service.
This is the last port number that identifies a service.
This is the IP protocol.
Click this button to add a rule to the table below.
This is the rule index number (read-only).
This field indicates whether the rule is active or not.
Clear the check box to disable the rule. Select the check box to enable it.
Chapter 8 Network Address Translation (NAT)
125