Over the past couple of days we have been having issues with OneDrive/Sharepoint syncing/freezing. If we try to browse to our Sharepoint site we get a DNS error. Today have narrowed this down to a DNS issue on the router. We are using the TalkTalk provided DNS servers:
79.79.79.77
79.79.79.78
So I changed this to 8.8.8.8 for the primary on the router and we can now access the site again.
The router is: HG635
Don't think these DNS servers are the Spam filtering servers so I presume this should be fine.
Don't really want to use Google DNS, would prefer to use TalkTalk.