Operation Manual

Chapter 11 Network Address Translation (NAT)
VMG/XMG Series User’s Guide
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Figure 137 Port Triggering: Add/Edit
The following table describes the labels in this screen.
11.4 The DMZ Screen
A client in the Demilitarized Zone (DMZ) is no longer behind the Zyxel Device and therefore can run any
Internet applications such as video conferencing and Internet gaming without restrictions. This,
however, may pose a security threat to the Zyxel Device.
Table 80 Port Triggering: Configuration Add/Edit
LABEL DESCRIPTION
Active Select Enable or Disable to activate or deactivate the rule.
Service Name Enter a name to identify this rule using keyboard characters (A-Z, a-z, 1-2 and so on).
WAN Interface Select a WAN interface for which you want to configure port triggering rules.
Trigger Start Port 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.
Type a port number or the starting port number in a range of port numbers.
Trigger End Port Type a port number or the ending port number in a range of port numbers.
Trigger Protocol Select the transport layer protocol from TCP, UDP, or TCP/UDP.
Open Start Port 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.
Type a port number or the starting port number in a range of port numbers.
Open End Port Type a port number or the ending port number in a range of port numbers.
Open Protocol Select the transport layer protocol from TCP, UDP, or TCP/UDP.
Cancel Click Cancel to exit this screen without saving.
OK Click OK to save your changes.