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Chapter 8 Create Firewall
Basic Firewall Configuration Wizard
8-4
Cisco Router and Security Device Manager 2.5 User’s Guide
OL-4015-12
Basic Firewall Configuration Wizard
Cisco SDM will protect the LAN with a default firewall when you select this
option. For Cisco SDM to do this, you must specify the inside and outside
interfaces in the next window. Click Next to begin configuration.
Basic Firewall Interface Configuration
Identify the interfaces on the router so that the firewall will be applied to the
correct interface.
Outside (untrusted) Interface
Select the router interface that is connected to the Internet or to your
organization’s WAN.
Note Do not select the interface through which you accessed Cisco SDM as the outside
(untrusted) interface. Doing so will cause you to lose your connection to Cisco
SDM. Because it will be protected by a firewall, you will not be able to launch
Cisco SDM from the outside (untrusted) interface after the Firewall Wizard
completes.
Allow secure Cisco SDM access from outside interfaces checkbox
Check this box if you want users outside the firewall to be able to access the router
using Cisco SDM. The wizard will display a screen that allows you to specify a
host IP address or a network address. The firewall will be modified to allow access
to the address you specify. If youspecify a network address, all hosts on that
network willbe allowed through the firewall.
Inside (trusted) Interfaces
Check the physical and logical interfaces connecting to the LAN. You can select
multiple interfaces.