Setup pf.conf file

So the general layout of the pf file is

Macro Definitions

In the macro definitions we declare the: interfaces, hosts, ports etc.
To be able to change port numbers or IP-addresses without the need to go through the complete configuration file.

TABLES

Here we define Tables used for spamd and ftp proxy functionality

TRANSLATION

In the translation section we define the redirect rules for incoming traffic. Like send http and https to the webserver and smtp traffic to the mailserver.

PACKET FILTERING

The packet filtering section are split several ways for efficiency reasons. First they split in WAN NIC and LAN NIC traffic. Each of these sections is then split into NIC IN and OUT out traffic. The IN and OUT sections are then split for TCP and UDP traffic.

#======================================================
#	ext-if
#========================================
#	ext-if IN
#===========================
#	ext-if IN TCP
#===========================
#	ext-if IN UDP
#===========================
#	ext-if IN IMCP
#========================================
#	ext-if OUT
#===========================
#	ext-if OUT TCP
#===========================
#	ext-if OUT UDP
#===========================
#	ext-if OUT IMCP
#======================================================
#	int-if
#========================================
#	int-if IN
#===========================
#	int-if IN TCP
#===========================
#	int-if IN UDP
#===========================
#	int-if IN ICMP
#========================================
#	int-if OUT
#===========================
#	int-if OUT TCP
#===========================
#	int-if OUT UDP
#===========================
#	int-if OUT ICMP