CANNOT ACCESS ROUTER ANYMORE?

Hi Vumatel, I cannot access my router anymore. Confirmed with 3 people in our area they cannot access there routers as well. In the beginning I could but now I can't? Another thing i have security cameras that use DYNDDNS/NO-IP services since I cannot access the router my security cameras cannot function remotely. I need access to the router to fix my security cameras this is indeed a big problem???