The Cisco ASA firewall can be challenging to work with, and using the CLI can be difficult. However, basic configuration can still be done using the ASDM GUI. Since I don’t have a lot of time and energy to research the Cisco ASA firewall in-depth, I’m documenting the setup steps to avoid having to start from scratch again after a long time.
In this example, we will configure NAT (Port Forwarding) for three NVR (CCTV recorders) on the Cisco ASA 5512-X firewall to allow access from the outside network. Details are shown in the following diagram.
Screenshots with minimal annotations.
- Network Objects (Creating network objects)
- Service Objects (Creating service objects)
Creating NAT rules using
Public_37 (Network Object) is the previously created Public IP address 184.108.40.206.
Access rules are necessary to allow access from the outside network to the internal devices.
This example covers the basic configuration of the ASA firewall, with a focus on understanding the basic relationship between
Access Rules. This will make it easier to configure firewalls from different vendors in the future.