Viper SC+™ IP Router for Licensed Spectrum PN 001-5008-000 Rev. C
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NAT PORT FORWARDING
The NAT Port Forwarding table allows the user to specify a particular public port or range of ports to be forwarded to
the private network hidden by the Network Address Translation table. The user can also select between TCP and UDP
protocols.
The following figure shows the NAT Eth IP subnet 192.168.205.0 will be hidden from the public network. Any TCP
packets sent to the Viper with port number 2000 will be redirected to the Private IP Address and Private Port number
entered in the NAT Forwarding Table.
Figure 91 – NAT Port Forwarding, Port 2000 is redirected to 192.168.205.125:23
The following figure shows the Private Network 192.168.205.0 being protected from the Public Network 172.31.5.0.
Viper (1) NAT Eth interface is enabled and Viper (2) NAT is disabled. The Host 172.31.5.2 cannot send packets directly
to the Private Network because it is hidden. In this example, Host 172.31.5.2 thinks that the IP packets are coming from
10.0.14.203.