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Cyclades-PR4000
Chapter 13 - NAT
There are two types of NAT available in CyROS -- Normal NAT and Expanded NAT. This chapter describes
Expanded NAT. A description of Normal NAT appears in Chapter 4 of the CyROS Reference Guide.
What is the difference between Expanded and Normal Mode NAT? The Normal Mode is a previous
implementation of NAT used in the Power Router line. It has been maintained for backward
compatibility. Expanded NAT provides static translation not only from one IP address to another, but
from one IP address/port pair to another IP address/port pair.
As a preview, after configuring the router as shown in the example, CONFIG =>SECURITY =>NAT =>L will
display:
NAT Enabled
NAT mode Expanded
Port map translation Enabled
UDP Timeout (min) 5
DNS Timeout (min) 1
TCP Timeout (min) 1440
TCP flags Timeout (min) 1
NAT Global Addresses
# address range
1 200.240.230.225 to 200.240.230.238
NAT Local Addresses
# address range
1 192.168.0.0 255.255.255.0 translated