I was called into a client site to help fix a particular nagging problem on their network – some network users lose Internet access randomly without any seeming reason. Let me begin our discussion on pfSense with my personal experience about this product. At the simplest form of it, a perimeter security device provides protection for trusted devices (internal devices) against untrusted devices (external devices such as those on the Internet). PfSense and the Cisco ASA can basically be classed as perimeter security devices. We will take each product individually, looking at their pros and cons, and also discuss what scenario(s) they can be used and recommended. In this article, we will be comparing two security products – pfSense and the Cisco Adaptive Security Appliance (ASA), to help you in choosing the right firewall for your network.
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