Netgear C6300 ambar upstream light.

Hi,

I have a Netgear C6300 which is not working properly. First of all a cant access to the GUI with the ip of the router which i configured a couple months ago and after rebooting the router all the lights are green but not the upstream one which is now ambar. I checked the manual but it does not say anything about an ambar or orange link. BTW my internet works fine but i need to solve this problem because i need to open some ports on the router.

Regards,

Daniel