Oracle Solaris IP Filter can be used to provide firewall services or network address translation (NAT). Oracle Solaris IP Filter can be implemented using loadable configuration files. Oracle Solaris IP Filter includes a directory called /etc/ipf. You can create and store configuration files called ipf.conf, ipnat.conf and ippool.conf in the /etc/ipf directory. These files are loaded automatically during the boot process when they reside in the /etc/ipf directory. You can also store the configuration files in another location and load the files manually. For example configuration files, see Creating and Editing Oracle Solaris IP Filter Configuration Files.