I am confused about use of Central NAT. Please can you explain with a real life example.
There are two ways of configuring source/destination NAT: firewall policy NAT and central NAT, but both produce the same results.
An example would be a small branch office, where you have fewer firewall policies. In this case, you can use firewall policy NAT:
In the case of a managed service provider, central NAT can be used to do SNAT and DNAT for a virtual domain containing a large number of firewall policies. You only have to configure central SNAT and DNAT rules once, and they can be applied to multiple firewall policies.
Thanks for clarifying the doubt.
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