26-17
Cisco ASA 5500 Series Configuration Guide using ASDM
OL-20339-01
Chapter 26 Information About NAT
How NAT is Implemented
Figure 26-14 Twice NAT with Different Destination Addresses
Figure 26-15 shows the use of source and destination ports. The host on the 10.1.2.0/24 network accesses
a single host for both web services and Telnet services. When the host accesses the server for web
services, the real address is translated to 209.165.202.129. When the host accesses the same server for
Telnet services, the real address is translated to 209.165.202.130.
Figure 26-15 Twice NAT with Different Destination Ports
Server 1
209.165.201.11
Server 2
209.165.200.225
DMZ
Inside
10.1.2.27
10.1.2.0/24
130039
209.165.201.0/27 209.165.200.224/27
Translation
209.165.202.12910.1.2.27
Translation
209.165.202.13010.1.2.27
Packet
Dest. Address:
209.165.201.11
Packet
Dest. Address:
209.165.200.225
Web and Telnet server:
209.165.201.11
Internet
Inside
Translation
209.165.202.12910.1.2.27:80
10.1.2.27
10.1.2.0/24
Translation
209.165.202.13010.1.2.27:23
Web Packet
Dest. Address:
209.165.201.11:80
Telnet Packet
Dest. Address:
209.165.201.11:23
130040
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