How To Setup Cisco Router Firewall Settings?

Cisco Router Firewall Settings

A firewall is actually a set of rules that can be used to protect and secure the resources of your Local Area Network (LAN). This set of rules does the task of filtering the packets that arrive at your router. In case a packet meets the criteria that are mentioned in the rule, it is allowed to pass through. If not, that packet is dropped. This is the main concept of creating a firewall and it applies to Cisco router firewalls as well.On this page, we shall see how to configure a Cisco router firewall settings.

There are two ways to configure the firewall settings for your Cisco router.

  • Using the Basic Firewall Configuration Wizard
  • Using the Advanced Firewall Configuration Wizard
Configure Cisco Router Firewall

Configuring The Firewall Settings For A Cisco Router:

Basic Firewall:

This is the default firewall rule that is recommended by the Cisco manufacturers. You can opt for the Basic Firewall if you want your Cisco SDM to create a firewall using just the default rules.Here, the question, “What is Cisco SDM?” arises. SDM stands for Security Device Manager. The Cisco Router and Security Device Manager is, in fact, a web-based device management tool designed for Cisco routers.To configure the basic firewall settings on your Cisco router, follow these simple steps:

  • First, open the default web browser on your computer.
  • Next, you have to sign into Cisco SDM or the web access page of your Cisco router.
  • Now, you need to click the Firewall tab and select the Basic Firewall option.
  • You need to choose the Launch the Selected Task option.
  • You can now check the default firewall rules that are displayed on your screen.
  • Cisco SDM will now request you to identify the interfaces on your router. It will then make use of the default access and inspection rules to create the basic firewall.
  • Finally, click on the Save button.
  • You have now completed the settings for your Cisco router’s basic firewall.

Learn how to configure cisco router firewall settings using advanced firewall.

Advanced Firewall:

The Advanced Firewall allows you to create your own inspection rules (whereas the basic firewall uses the default rules).You can opt for the Advanced Firewall if you want the Cisco SDM to lead you through the instructions of configuring a firewall. Here, you also have the facility to create a DMZ network. Here, DMZ stands for Demilitarized Zone. It is a perimeter network that can safeguard an organization’s LAN from untrusted traffic.To configure the advanced firewall settings on your Cisco router, follow these simple steps:

  • First, open the default web browser on your computer.
  • Next, you have to sign into Cisco SDM or the web access page of your Cisco router.
  • Now, you need to click the Firewall tab.
  • Select the Advanced Firewall option.
  • Next, you have to choose the Launch the Selected Task option.
  • On the page that displays next, you can create your rules and then enter them in the respective fields provided.
  • Finally, click on the Save button in order to save all your settings.
  • You have now completed the settings for your Cisco router’s advanced firewall.

Once you are through with configuring the cisco router firewall settings, read the next section to know more about the settings you can change within your firewall.

  • On your computer, you have to navigate to the Firewall section of your Cisco router.
  • Now, you have to click the Additional Tasks menu.
  • You will find that the Additional Tasks menu section is expanded.
  • Select the Logging option.
  • Next, click on Edit.
  • On the Syslog screen, you need to check the Logging to Buffer option.
  • You can now see the default value of your Cisco router’s memory.
  • You will also find the default values for other similar settings.
  • If you wish to make any modifications to these settings, do it now.
  • Finally, click on the OK button.
  • You have now seen how to change certain settings on your Cisco router’s firewall.

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