Nat on pfsense

[n3m3sis]

Nat is very popular feature in firewalls, but its seems its regular feature in pfSense,
i want to create a nat, on WAN interface i have internet, and i have lan interface and its IP Address is 172.16.1.1/24, i want that , all machine in this range should have internet,

means internet address is X.Y.Z.W and lan address is 172.16.1.0/24,
how should i do this nat?
why should it be very hard to do in pfSense ?

[KOM]

how should i do this nat?

pfSense does this automatically.

why should it be very hard to do in pfSense ?

It shouldn't be, and it isn't.  Is there a specific problem that you are having?  You would get more help if you talked about the details of your problem instead of talking about vague & generic issues with NAT.

[johnpoz]

That is done automatically when you install pfsense, change pfsense lan IP to be the network you want and there you go that would be natted to your public IP.