Cisco Cisco Email Security Appliance C160 Mode D'Emploi

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Cisco AsyncOS 8.5 for Email User Guide
 
Chapter 21      Encrypting Communication with Other MTAs
  Enabling TLS on a Listener’s HAT
The mail flow policy for the listener is updated with the TLS setting you chose. 
CLI Example: Changing the TLS Setting for Listener’s HAT
Procedure 
Step 1
Use the 
listenerconfig -> edit 
command to choose a listener you want to configure. 
Step 2
Use the
 hostaccess -> default
 command to edit the listener’s default HAT settings. 
Step 3
Change the TLS setting by entering one of the following choices when you are prompted with the 
following questions: 
Note that this example asks you to use the 
certconfig
 command to ensure that there is a valid certificate 
that can be used with the listener. If you have not created any certificates, the listener uses the 
demonstration certificate that is pre-installed on the appliance. You may enable TLS with the 
demonstration certificate for testing purposes, but it is not secure and is not recommended for general 
use. Use the 
listenerconfig -> edit -> certificate
 command to assign a certificate to the listener.
Once you have configured TLS, the setting will be reflected in the summary of the listener in the CLI: 
Do you want to allow encrypted TLS connections?
1. No
2. Preferred
3. Required
[1]> 3
You have chosen to enable TLS. Please use the 'certconfig' command to 
ensure that there is a valid certificate configured.
Name: Inboundmail
Type: Public
Interface: PublicNet (192.168.2.1/24) TCP Port 25
Protocol: SMTP
Default Domain:
Max Concurrency: 1000 (TCP Queue: 50)
Domain map: disabled
TLS: Required