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PLANET Technology Corp. GRT-101/401/402 User’s Manual
possible when the number of hosts having concurrent requests to the external
network is equal to or less than the number of external IP addresses on GRT
series. To setup GRT series working for the above situation where WAN 1 is
used to connect to the corresponding ISP, use the below commands:
admin# setup lan 1 attrib Virtual
admin# setup ip_share nat global interface 3 1
admin# setup ip_share nat global range 3 69.210.1.2 6
admin# setup ip_share nat virtual range 3 192.168.0.2 24
To show the configuration, use the list command:
admin# setup ip_share nat global list
admin# setup ip_share nat virtual list
Note: The IP translation only works between global and virtual IP pools with the same range number. Totally there are
5 NAT global and 5 NAT virtual IP pools for this purpose.
To save your changes, enter:
admin# write
In the above example, it might happen that packets from some hosts will be
dropped when the number of hosts having concurrent requests to the external
network is greater than the number of external IP addresses. If it is necessary
to guarantee that some hosts (e.g., 192.168.0.31~192.168.0.33) can access
Internet at any time, you can use the fixed IP address mapping pool with extra
external IP addresses 69.210.1.8~69.210.1.10, also given from ISP via WAN
1:
admin# setup lan 1 attrib Virtual
admin# setup ip_share nat fixed interface 1 1
admin# setup ip_share nat fixed modify 1 192.168.0.31 69.210.1.8
admin# setup ip_share nat fixed interface 2 1
admin# setup ip_share nat fixed modify 2 192.168.0.32 69.210.1.9
admin# setup ip_share nat fixed interface 3 1
admin# setup ip_share nat fixed modify 3 192.168.0.33 69.210.1.10
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