| 9.3 |  | Configuring DNS Support |
| 9.3.2 |  | DNS doctoring proccess |

| DNS doctoring overview The alias command translates one IP address into another. One of the main uses of this command is DNS doctoring, which is translating the IP address embedded in a DNS response. The example in Figure reveals how DNS doctoring is helpful and shows how to use the alias command for this purpose. The internal Web server in the example in Figure , which is the Web server for cisco.com, has an IP address of 10.0.0.10. For hosts on the 10.0.0.0 network to access the Web server by its domain name, they must resolve the name by using the DNS server on the outside interface of the PIX Security Appliance. This problem can be solved by using the alias command.

| Media Activity Demonstration Activity: Enabling DNS Doctoring Process In this activity, students will learn about configuring DNS doctoring on the PIX Security Appliance with the

alias command.