When Cisco made changes to the Cisco ASA software in 8.3, it completely shook the ASA engineering community. Major changes overhauled the operating system in how the Cisco ASA handles Network Address Translation. Even today, these changes still surprise people when upgrading from 8.2 to 8.3 or later and many people have a hard time understanding these changes. However, these changes are actually a good thing as it gives you more granular control over the NAT function(s) that your Cisco ASA performs. I have compiled a list of differences...