Dialup firewalling with FreeBSD
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# 3 Changing `/etc/rc.conf` to load the firewall

`/etc/rc.conf` needs to be slightly modified in order to tell the system about the firewall and to specify the location for our rules file. Add the following lines to `/etc/rc.conf`:

    firewall_enable="YES"
    firewall_script="/etc/firewall/fwrules"

For more information on the functions of these statements take a look at `/etc/defaults/rc.conf` and read rc.conf(5)

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Kernel Options |  | Enable PPP's network address translation