Up until now we have discussed a source snapped using the outgoing interface and IP pools.
Now we can add more granularity to our net by using central net to use central net.
Make sure that your 48 is in a policy based NGO w mode policy based.
Now when you enable policy based you will see that in your policy and object you have a new menu which
is central net where you can create a list of central net policies where you can determine not only
the incoming entrants face and the outgoing interface but also the source address the destination address.
You have full control of your IP addresses.
You can determine if you want you want to use outgoing interface address.
But here you can also determine the port number or dynamic IP pools as we did before but still decide
which ports will be translated.
You can create a different central net rules they will be read in a top down with methodology until
48 hits a matching room for the incoming address.