Cisco Cisco Email Security Appliance C160 Mode D'Emploi

Most users take advantage of the two Data Ethernet ports on the Email Security appliance by connecting 
to two networks from the appliance:

The private network accepts and delivers messages to your internal systems.

The public network accepts and delivers messages to the Internet.

Other users may want to use only one Data port serving both functions. Although the Management 
Ethernet port can support any function, it is preconfigured for access to the graphical user interface and 
the command line interface.

You can segregate incoming and outgoing email traffic over separate listeners and on separate IP 
addresses. You can use Internet Protocol version 4 (IPv4) and version 6 (IPv6) addresses. However, the 
System Setup Wizard on the appliance supports initial configuration of the following configurations:

2 separate listeners on 2 logical IPv4 and 2 IPv6 addresses configured on separate physical 
interfaces

segregates incoming and outgoing traffic

you can assign an IPv4 and an IPv6 address to each listener

1 listener on 1 logical IPv4 address configured on one physical interface

combines both incoming and outgoing traffic

you can assign both an IPv4 and an IPv6 address to the listener

The Email Security appliance can support both IPv4 and IPv6 addresses on single listener. The listener 
will accept mail on both the addresses. All settings on a listener apply to both IPv4 and IPv6 addresses.

You will need the following network information about each Ethernet port that you choose to use:

IP address (IPv4 or IPv6 or both)

Netmask for IPv4 address in CIDR format

Prefix for IPv6 address in CIDR format

In addition, you will need the following information about your overall network:

IP address of the default router (gateway) on your network

IP address and hostname of your DNS servers (not required if you want to use Internet root servers)

Hostname or IP address of your NTP servers (not required if you want to use Cisco’s time servers)

See 

 for more information.

If you are running a firewall on your network between the Internet and the Email Security appliance, it 
may be necessary to open specific ports for the appliance to work properly. See 

 for more information.