• Captive Portal Using PHP and iptables Firewall on Linux (http://aryo.info/labs/captive-portal-using-php-and-iptables.html)
• Using iptables and PHP to create a captive portal (http://www.andybev.com/index.php/Using_iptables_and_PHP_to_create_a_captive_portal)

root@gate:~# cat nat.sh

iptables -t nat --flush

iptables -t nat -A POSTROUTING -o eth1 -s 192.168.X.0/24 -j MASQUERADE

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j DNAT --to-destination 192.168.X.1

iptables -t nat -I PREROUTING -i eth0 -s 192.168.X.10 -j ACCEPT

conntrack -F

<code> root@gate:~# cat /var/www/index.php