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hidden. In this example, remember that Host 172.31.5.2 thinks the IP packets are coming
from 10.0.14.203.
- NAT on Viper: Port 2000 is redirected to 192.168.205.125:23
hen Host 172.31.5.2 wants to send packets to Host 192.168.205.2 the packets are sent to
0.0.14.203. NAT port translation allows Host 172.31.5.2:1435 (port 1435) to send TCP
5.5:23 (port 23) by sending the packets to 10.0.14.203:2000 (port
000). Figure 7.20 shows how the packets would be modified as they moved through the
etwork.
Figure 7.20 - Packet flow, Port redirection
001-5008-000(Rev8) Page 75
Figure 7.19
Eth: 172.31.5.1
RF: 10.0.14.203
Port 2000
RF: 10.0.14.186
Eth: 192.168.205.1
Host 2
Eth: 172.31.5.2
Port 1435
Viper (2)
(NAT disabled)
Private Network
Host 1
Public Network
RF Network
Viper (1)
(NAT enabled,
Ethernet Interface is private, Port re directed)
Eth: 192.168.205.2
Port 23
W
1
packets to 192.168.20
2
n
Packet (1)
Source Address
172.31.5.2:1435
Destination Address
192.168.205.2:23
Packet (1)
Source Address
172.31.5.2:1435
Destination Address
10.0.14.203:2000
Packet (1)
Source Address
172.31.5.2:1435
Destination Address
10.0.14.203:2000
V
Host 1
2.168.205.2
Host 2
172.31.5.2
iper 1
NAT enabled, Eth is private
Port 2000 translate to Port 23
V
iper 2
NAT disabled
Private Network
RF Network
19