We are using the Mac Filtering section of the Sagemcom Fast 5364 Router. It changes about once a day from "allow" to "deny" and therefore no devices can access the WIFI. We have had the router for a few years, could this be a hardware fault?
Have you had TalkTalk’s Wi-Fi optimisation disabled on your Sagemcom FAST5364/5464 router? When this is enabled, as it is by default, it has the power to override any Wi-Fi configuration changes that you make. Only TalkTalk can do this for you, you cannot do it yourself. If not, just request they disable this for you in your reply.
