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DNS Doctoring

In many network deployments, the DNS servers and DNS clients are set up for address translation but they are located on different subnets through the security appliance,. This is illustrated in Figure 4-41. The web server (www.securemeinc.com) and the web clients are located toward the inside network, whereas the DNS server is on the outside network. The real IP address of the web server is 192.168.10.10 and the translated public address is 209.265.200.227.

Figure 4-41. DNS and NAT Without DNS Doctoring



  

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