I have a blinkin n600 wireless router set up with the bare bones settings. No static ips, just dhcp and wpa/wpa2 setup.
The internet on both the mac book bro and probook is working 100% fine, the mac book on wireless and probook through ethernet.
But when it comes to the iMac (which is running osx) it shows it is connected to the wireless. But there is no internet. There is no static ip address or firewalls stopping connection to the router or the internet.
I had the iMac working with an open network before that just had a hidden ssid and a static ip thing going on where only certain mac addresses would work with it.
If you need any more info just ask away.