Cisco 7604 Configuration Guide - Page 315
Policy NAT with Different Destination Addresses
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Chapter 16 Configuring NAT NAT Overview Note All types of NAT support policy NAT except for NAT exemption. NAT exemption uses an access list to identify the real addresses, but differs from policy NAT in that the ports are not considered. See the "Bypassing NAT" section on page 16-33 for other differences. You can accomplish the same result as NAT exemption using static identity NAT, which does support policy NAT. Figure 16-9 shows a host on the 10.1.2.0/24 network accessing two different servers. When the host accesses the server at 209.165.201.11, the real address is translated to 209.165.202.129. When the host accesses the server at 209.165.200.225, the real address is translated to 209.165.202.130 so that the host appears to be on the same network as the servers, which can help with routing. Figure 16-9 Policy NAT with Different Destination Addresses Server 1 Server 2 209.165.201.11 209.165.200.225 209.165.201.0/27 DMZ 209.165.200.224/27 Translation 10.1.2.27 209.165.202.129 Translation 10.1.2.27 209.165.202.130 Inside 10.1.2.0/24 Packet Dest. Address: 209.165.201.11 10.1.2.27 Packet Dest. Address: 209.165.200.225 132941 See the following commands for this example: hostname(config)# access-list NET1 permit ip 10.1.2.0 255.255.255.0 209.165.201.0 255.255.255.224 hostname(config)# access-list NET2 permit ip 10.1.2.0 255.255.255.0 209.165.200.224 255.255.255.224 hostname(config)# nat (inside) 1 access-list NET1 hostname(config)# global (outside) 1 209.165.202.129 hostname(config)# nat (inside) 2 access-list NET2 hostname(config)# global (outside) 2 209.165.202.130 OL-20748-01 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM 16-11
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