If a device is running in DHCP mode, but has its DNS settings changed manually, which differ from the DNS settings of the router (which is acting as the DHCP server), will the routers DNS settings override the devices DNS settings, when the device makes an outgoing connection to the WAN ?
Background info :
We have an ISP that will not allow the connection from the modem unless you use their DNS servers, the ISP also dose not let you use your own modem or rotuer, although there is a work around for this using a Draytek 2862 router modem that we have implemented. At this same site we have a media server device that needs to be using Google DNS to work correctly.
The Draytek router which is also acting as the DHCP server is using the ISP DNS settings, the media server device which has DHCP enabled has a setting for DNS, so we have set the media server devices DNS to Google DNS, although the router is using the ISP's DNS.