Cisco Cisco Email Security Appliance C160 Betriebsanweisung

When you configure domain profiles and signing keys in a clustered environment, 
note that the Domain Key Profile settings and Signing Key settings are linked. 
Therefore, if you copy, move or delete a signing key, the same action is taken on 
the related profile. 

A signing key is the private key stored on the IronPort appliance. When creating 
a signing key, you specify a key size. Larger key sizes are more secure; however, 
larger keys also can impact performance. IronPort supports keys from 512 bits up 
to 2048 bits. The 768 - 1024 bit key sizes are considered secure and used by most 
senders today. Keys based on larger key sizes can impact performance and are not 
supported above 2048 bits. For more information about creating signing keys, see 

.

If you are entering an existing key, simply paste it into the form. Another way to 
use existing signing keys is to import the key as a text file. For more information 
about adding existing signing keys, see 

Once a key is entered, it is available for use in domain profiles, and will appear in 
the Signing Key list in the domain profile: