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.
Stateful Tracking Options (STO)
TABLES
Here we define Tables used for spamd and ftp proxy functionality
OPTIONS
TRAFFIC NORMALISATION
QUEUEING
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
#====================================================== # 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