Cisco Cisco Email Security Appliance C160 Mode D'Emploi

The following physical dimensions apply to the Cisco IronPort C150 and C160 
Email Security appliances:

Height: 4.2 cm (1.68 inches)

Width: 48.26 cm (19.0 inches) with rails installed (without rails, 17.5 inches)

Depth: 57.6 cm (22.7 inches)

Weight: maximum 11.8 kg (26 lbs)

The typical configuration scenario for the Cisco IronPort appliance is as follows: 

Interfaces - Only one of the three available Ethernet interfaces on the Cisco 
IronPort appliance is required for most network environments. However, you 
can configure two Ethernet interfaces and segregate your internal network 
from your external Internet network connection.

Public Listener (incoming email) - The public listener receives connections 
from many external hosts and directs messages to a limited number of internal 
groupware servers.

Accepts connections from external mail hosts based on settings in the 
HAT. By default, the HAT is configured to ACCEPT connections from all 
external mail hosts.

Accepts incoming mail only if it is addressed for the local domains 
specified in the RAT. All other domains are rejected.

Relays mail to the appropriate internal groupware server, as defined by 
SMTP Routes.

Private Listener (outgoing email) - The private listener receives 
connections from a limited number of internal groupware servers and directs 
messages to many external mail hosts.