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In this video, Anthony Sequeira covers how to control traffic filtering configurations with ACLs on the Cisco ASA. In a default firewall configuration, low-security interfaces cannot go in and access high-security interfaces. This is fine until you need to allow temporary access from outside your organization, and that’s where traffic filtering comes into play.

One of the primary purposes of traffic filtering is to selectively allow people from outside your organization through your firewall on an ad hoc basis. If you need an outside vendor to work remotely, a default firewall configuration will create a tremendous permissions headache. With traffic filtering, however, you can set up access control lists and drastically simplify the entire process. In this video, Anthony will walk you through each step of configuring an active security appliance on a GNS3, then go inside of it to set up an access control list. This will get you up and running, and you can then adjust the settings to meet the needs of your specific situation.

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