IP Filter can be used to provide firewall services or network address translation (NAT). Rules for your firewall and NAT are not provided by default. You must create custom configuration files and set the pathnames to these files as values of IP Filter service properties. After the service is enabled, these files are loaded automatically when the system is rebooted. For sample configuration files, see IP Filter Configuration File Examples. For more information, see the svc.ipfd(1M) man page.