Bind on CentOS behind pfSense - port 53 not redirecting

[mateusscheper]

Hey guys, I'm trying to setup a DNS server in a CentOS 7 machine, but pfSense is not redirecting external requests from WAN address:53 to 10.1.1.15:53.
I used tcpdump in my pfSense machine and saw DNS requests coming from my external test, but when tcpdumping in my 10.1.1.15 machine, nothing happens.
Any tips on what I'm doing wrong?

pf: It's a slave DNS.

NAT > Source Address any
Ports any
Dest. Address WAN address
Port 53
redirects to
10.1.1.15
Port 53.

I think this is something I'm doing wrong in pfSense because my slave DNS is copying the files from my master DNS.