ZyXEL Communications SBG5500-A, User Manual

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Chapter 8 Network Address Translation (NAT)
SBG5500 Series User’s Guide
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The following table describes the labels in this screen.
8.4 The Address Mapping Screen
Use this screen to change your SBG’s address mapping settings. Ordering your rules is important,
because the SBG applies the rules in the order that you specify. When a rule matches the current
packet, the SBG takes the corresponding action and the remaining rules are ignored.
Click Configuration > NAT > Address Mapping to display the following screen.
Figure 100 Configuration > NAT > Address Mapping
Table 45 Port Triggering: Configuration Add/Edit
LABEL DESCRIPTION
Enable Select the check box to activate this rule.
Service Name Enter a name to identify this rule. It should begin with a letter and cannot exceed 20 characters
[0-9][A-Z] [a-z][_-].
WAN Interface Select a WAN interface for which you want to configure port triggering rules.
Trigger
Protocol Select the transport layer protocol from TCP , UDP , or TCP/UDP .
Starting Port The trigger port is a port (or a range of ports) that causes (or triggers) the SBG 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 (1-65535).
Ending Port Type a port number or the ending port number in a range of port numbers (1-65535).
Open
Protocol Select the transport layer protocol from TCP , UDP , or TCP/UDP .
Starting 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 SBG 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 (1-65535).
Ending Port Type a port number or the ending port number in a range of port numbers (1-65535).
OK Click OK to save your changes.
Cancel Click Cancel to exit this screen without saving.