pfSense

function interfaces_lan_configure() {

	global $config, $g;

	$lancfg = $config['interfaces']['lan'];

	/* if user has removed ip address, clear it*/

	if($lancfg['ipaddr'] == "")

		mwexec("/sbin/ifconfig {$lancfg['if']} delete");

	/* wireless configuration? */

	if (is_array($lancfg['wireless']))

		interfaces_wireless_configure($lancfg['if'], $lancfg['wireless']);

	/* MAC spoofing? */

	if ($lancfg['spoofmac']) {

		mwexec("/sbin/ifconfig " . escapeshellarg($lancfg['if']) .

			" link " . escapeshellarg($lancfg['spoofmac']));

	} else {

		$mac = get_interface_mac_address($lancfg['if']);

		if($mac == "ff:ff:ff:ff:ff:ff") {

			/*   this is not a valid mac address.  generate a

			 *   temporary mac address so the machine can get online.

			 */

			echo "Generating new MAC address.";

			$random_mac = generate_random_mac_address();

			mwexec("/sbin/ifconfig " . escapeshellarg($lancfg['if']) .

				" link " . escapeshellarg($random_mac));

			$lancfg['spoofmac'] = $random_mac;

			write_config();

			file_notice("MAC Address altered", "The INVALID MAC address (ff:ff:ff:ff:ff:ff) on interface {$lancfg['if']} has been automatically replaced with {$random_mac}", "Interfaces");

		}

	}

	/* media */

	if ($lancfg['media'] || $lancfg['mediaopt']) {

		$cmd = "/sbin/ifconfig " . escapeshellarg($lancfg['if']);

		if ($lancfg['media'])

			$cmd .= " media " . escapeshellarg($lancfg['media']);

		if ($lancfg['mediaopt'])

			$cmd .= " mediaopt " . escapeshellarg($lancfg['mediaopt']);

		mwexec($cmd);

	}

	mwexec("/sbin/ifconfig " . escapeshellarg($lancfg['if']) . " " .

		escapeshellarg($lancfg['ipaddr'] . "/" . $lancfg['subnet']));

	if (!$g['booting']) {

		/* make new hosts file */

		system_hosts_generate();

		/* reconfigure static routes (kernel may have deleted them) */

		system_routing_configure();

		/* set the reload filter dity flag */

		touch("{$g['tmp_path']}/filter_dirty");

		/* reload IPsec tunnels */

		vpn_ipsec_configure();

		/* reload dhcpd (gateway may have changed) */

		services_dhcpd_configure();

		/* reload dnsmasq */

		services_dnsmasq_configure();

		/* reload captive portal */

		captiveportal_configure();

	}

	return 0;

}

		if ($if == "lan")

			interfaces_lan_configure();

		else

			interfaces_wan_configure($if);

		/* restart ez-ipupdate */