![]() Side talk: don’t tell the customer but I once downgraded a customer’s firewall from ASA version 8.3 to 8.2 just so I didn’t have to worry about the NAT syntax change. These are not formal definitions but if you are familiar with the Cisco ASA, then you know things changed drastically between ASA version 8.2 and 8.3, one of them being NAT. The same way we have before Christ (BC) and anno Domini (AD) when talking about calendar dates, we have two main “eras” when talking about the Cisco ASA: pre-8.3 and 8.3+. The current Cisco ASA models (now with FirePOWER services) include:Īlthough NAT can be defined more as a functional feature (translating a private IP address space to a smaller public IP address space), it can also be seen as a security feature (hiding real IP addresses). In the simplest form, the Adaptive Security Appliance ( ASA) is Cisco’s implementation of a firewall and one of the fundamental functions of a firewall is to sit between internal and external nodes and provide security. I will assume the readers of this article know what NAT and the Cisco ASA are, so I will just give an overview. Tag – Cisco ASA version 8.In this article, we will be looking at Network Address Translation ( NAT) on the Cisco ASA. ![]() Post Reboot ASA -: Now you will get the full function on virtual ASAįinally, your Cisco ASA version 8.4 fully loaded and ready to work with GNS3.Enjoy you GNS3 LAB at Home
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