They are RFC 1918 addresses that have been used in a lab environment. Note: The IP addressing schemes that are used in this document are not legally routable on the Internet. The configuration that is described in this section uses this network setup: Note: Use the Command Lookup Tool ( registered customers only) to obtain more information on the commands that are used in this section. This section describes how to configure the ASA in order to reach the mail server in the DMZ network, the inside network, or the outside network. Refer to the Cisco Technical Tips Conventions for more information on document conventions. If your network is live, make sure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. Cisco 2800C Series Router with Cisco IOS ® Software Release 15.1(4)M6. Cisco ASA that runs software Version 9.1 or later.The information in this document is based on these software and hardware versions: There are no specific requirements for this document. This document describes how to configure a Cisco Adaptive Security Appliance (ASA) for access to a Simple Mail Transfer Protocol (SMTP) server that is located in the Demilitarized Zone (DMZ), the inside network, or the outside network.
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