I have an interesting problem where we can see any websites we've previously visited, but can't see any new ones. But it's not a DNS issue, because we can ping the new destination.
This affects everybody on the network. It's a 20 user network, DNS server is local server 192,168.0.1 followed by Google Public DNS 18.104.22.168. If we go onto usualwebsite.com, it comes up and we can browse. If we go to NewWebSite.com, we get nothing. If you ping NewWebSite.com, you get the right IP address.
Network gateway is a Draytek Vigor 2925, talking to a Vigor 130 VDSL modem. It uses PPPoE to connect to the Internet. Does anybody have any idea what it could be that's causing this?