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====== NAT on pfSense ======
This assumes that you have a basic knowledge of subnetting and NAT.


===== 1:many NAT =====
This is where you have one public IP and multiple LAN ips.

The WAN interface can be DHCP or static
{{ :pfsense_dhcp.png?nolink&300 |}}
Set a static IP on the LAN
{{ ::pfsense_lan.png?nolink&500 |}}


Set Automatic outbound nat
{{ ::pfsense_1:many_nat.png?nolink&300 |}}

Done

----



===== 1:1 NAT =====
You do not have to specify static WAN ip but you really should!
{{ ::pfsense_static.png?nolink&500 |}}
In this example the pfsense is on the blue team network (10.20.0.0/16) with the static IP 10.20.123.1/16

Set static IP on the LAN
{{ ::pfsense_lan.png?nolink&500 |}}

Go to the NAT settings. Firewall > NAT > Add
{{ ::pfsense_nat_blank.png?nolink&300 |}}

Create a new rule mapping the first external address (in this case 10.20.123.1) to the first internal address (192.168.1.1) and use the subnet mask for the internal network (24)
{{ ::pfsense_1:1_nat_rule.png?nolink&500 |}}


Finally you need to make the pfsense respond to ARP for those IPs.
Firewall > Virtual IPs > Add.
{{ ::pfsense_proxy_arp.png?nolink&400 |}}

Done

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