User`s guide

Chapter 5 Create Firewall
Basic Firewall Configuration Wizard
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Cisco Router and Security Device Manager Version 2.2 User’s Guide
OL-4015-08
Basic Firewall Configuration Wizard
SDM will protect the LAN with a default firewall when you select this option. For
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 SDM as the outside
(untrusted) interface. Doing so will cause you to lose your connection to SDM.
Because it will be protected by a firewall, you will not be able to launch SDM
from the outside (untrusted) interface after the Firewall Wizard completes.
Inside (trusted) Interfaces
Check the physical and logical interfaces connecting to the LAN. You can select
multiple interfaces.
Firewall Remote Management Access
Creating a firewall can block access to the router that remote administrators may
need. You can specify the router interfaces to use for remote management access
and the hosts from which administrators can log on to SDM to manage the router.
Select the outside interface
Select the interfaces through which users are to launch SDM.