ZyXEL Communications VMG8825-B Series, Руководство пользователя, Страница: 175 / 360

Chapter 11 Network Address Translation (NAT)
VMG8825-B Series User’s Guide
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The following table describes the labels in this screen.
11.5 The DMZ Screen
In addition to the servers for specified services, NAT supports a default server IP address. A default server
receives packets from ports that are not specified in the
NAT Port Forwarding Setup screen.
Figure 91 Network Setting > NAT > DMZ
The following table describes the fields in this screen.
Table 62 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 VMG 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 VMG 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 .
OK Click OK to save your changes.
Cancel Click Cancel to exit this screen without saving.
Table 63 Network Setting > NAT > DMZ
LABEL DESCRIPTION
Default Server
Address Enter the IP address of the default server which receives packets from ports that are not
specified in the
NAT Port Forwarding screen.
Note: If you do not assign a Default Server Address , the VMG discards all packets
received for ports that are not specified in the NAT Port Forwarding screen.