Hear is a temporary fix for comcast gateways only (arris, technicolor, Cisco ) this will fix you're connection problem but will limit you to one device. Log in the gate way 10.0.0.1 this is all comcast gateway ip log in. admin-admin password-password you should be on the main page gateway>at a glance on the top hit bridge mode this will make the gateway a stand-alone mode witch means only one device can hook up to it on port 1 it will change the IP address and you should be able to get back on to destiny. Now this is a work around till bungie find a fix for this.