ZyXEL Communications Prestige P-870HW-51a v2 - Manual (Page 111)

Chapter 8 Network Address Translation (NAT)
P-870HW-51a v2 User’s Guide
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8.4 The DMZ Host 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 56 NAT - DMZ Host
External Start
Port Enter the original destination port for the packets.
To forward only one port, enter the port number again in the External
End Port field.
To forward a series of ports, enter the start port number here and the
end port number in the External End Port field.
External End
Port Enter the last port of the original destination port range.
To forward only one port, enter the port number in the External Start
Port field above and then enter it again in this field.
To forward a series of ports, enter the last port number in a series that
begins with the port number in the External Start Port field above.
Internal Start
Port Enter the port number here to which you want the ZyXEL Device to
translate the incoming port. For a range of ports, enter the first number
of the range to which you want the incoming ports translated.
Internal End
Port Enter the last port of the translated port range.
Server IP
Address Enter the inside IP address of the virtual server here.
Protocol Select the protocol supported by this virtual server. Choices are TCP,
UDP, or TCP/UDP.
Back Click Back to return to the previous screen.
Apply Click Apply to save your changes back to the ZyXEL Device.
Cancel Click Cancel to begin configuring this screen afresh.
Table 29 Port Forwarding Edit (continued)
LABEL DESCRIPTION