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Cisco SDM Express
OL-7141-04
Chapter1 Cisco SDM Express
Firewall Configuration

Primary DNS Field

Enter the IP address of the primary Domain Name Server (DNS) that the router
will use. Your network administrator or service provider will provide you with the
IP address.
The primary DNS server is the server that the router contacts first when
attempting to resolve an IP address.
Note If you enter a hostname to identify a Cisco Network Services server in the Enter
the CNS Server IP Address /Hostname field, you must enter the IP address of a
DNS server in the Primary DNS field.

Secondary DNS Field

Enter the IP address of the secondary domain name Server that the router will use,
if one is available. Your network administrator or service provider will provide
you with the IP address.
The secondary DNS server is the server that the router contacts if the primary
server is not available.
Firewall Configuration
The Firewall Configuration window gives you the option of letting
Cisco SDM Express configure a firewall on your WAN and LAN interfaces. You
can apply a firewall during initial setup, or you can use CiscoSDM Express to
apply it after giving the router its initial configuration.
If you let Cisco SDM Express configure the firewall, you can modify the firewall
configuration later using the CiscoSDM Firewall Policy configuration feature.
Note • This feature is available if the Cisco IOS release running on your router
supports the Firewall feature set.
•The Firewall Configuration window does not appear if you did not configure
a WAN interface.