![]() These days, to hear that you can create multiple virtual firewalls out of a single Cisco appliance is probably not that much of a surprise to most readers. This article covers the basics of security contexts on the Cisco ASA. While not every feature of the Cisco ASA is supported in multiple context mode, most are, and certainly enough power is present now to make this appealing for many, many implementations. Each can have its own interfaces, its own administrators, and most importantly, its own security policies. Each security context is able to function as an independent device. We need to realize the potential power here. In this article, when we use the term security context, it is safe to think virtual firewall. You create multiple security contexts in order to create your multiple virtual firewalls. Multiple virtual firewalls are possible on the Cisco Adaptive Security Appliance (ASA) thanks to a technology called security contexts.
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