Cisco Cisco Email Security Appliance C160 Mode D'Emploi

In Step 3, you define the default router (gateway) and configure the DNS settings, 
and then set up the appliance to receive and or relay email by configuring the Data 
1, Data 2, and Management interfaces.

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

Next, configure the DNS (Domain Name Service) settings. Cisco IronPort 
AsyncOS contains a high-performance internal DNS resolver/cache that can 
query the Internet’s root servers directly, or the system can use DNS servers you 
specify. If you choose to use your own servers, you will need to supply the IP 
address and hostname of each DNS server. You can enter up to four DNS servers 
via the System Setup Wizard. Please note that DNS servers you enter will have an 
initial priority of 0. For more information, see 

.

The appliance requires access to a working DNS server in order to perform DNS 
lookups for incoming connections. If you cannot specify a working DNS server 
that is reachable by the appliance while you are setting up the appliance, a 
workaround is to either select “Use Internet Root DNS Servers” or to specify, 
temporarily, the IP address of the Management interface so that you can complete 
the System Setup Wizard.

Your Cisco IronPort appliance has network interfaces that are associated with the 
physical ports on the machine. For example, on C60/600/650/660/670, 
C30/300/350/360/370, and X1000/1050/1060/1070 appliances, three physical 
Ethernet interfaces are available. On C10/100/150/160 appliances, two physical 
Ethernet interfaces are available.

To use an interface, mark the “Enable” checkbox and then specify an IP address, 
network mask, and fully qualified hostname. The IP address you enter should be 
the address intended for your inbound mail as reflected in your DNS records. 
Typically this address would have an MX record associated with it in DNS.