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In this video, Keith Barker covers NAT on ASA v8.3 and higher. Keith manually demonstrates configuring auto (or object) NAT, manual NAT and the three sections in the NAT table: manual NAT in first position, auto NAT in second, and then manual NAT that's been pushed to third.

Let's say you want to automatically apply NAT to outbound traffic using a pool of available IP addresses — but sometimes you need a specific device to have a certain IP address when going to an exact destination. With ASA in v8.3 and higher, you can apply automatic or custom NAT configurations and have them get applied in the order you want. Watch Keith configure Auto (also called "Object") NAT on a network device. Then he overrides that rule with a Manual NAT rule. Last, he moves that Manual NAT rule behind the Auto NAT rule. And there you have the three sections in the NAT table: manual rules, automatic rules, and manual rules configured to be applied last.

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