what dns server did client used ?

[Mark Damrose]

"Jimmy Hsu" <jimmyhsu at du.net.tw> wrote in message
news:b27p44$fggh$1 at isrv4.isc.org...
> If a DHCP-enabled client set his preferred dns server as 1.1.1.1,
> and then get an IP from DHCP server (the server send back DNS
> server 2.2.2.2 to this client),then what dns server did this client
> use ?

1.1.1.1
If a client has access to change his own configuration, he will always be
able to override the DHCP settings.

> How to let the client always use 2.2.2.2 even if he choose a preferred
> dns server ?

Prevent clients from having access to change their own configurations.
Use a firewall to prevent them from using any DNS server except the ones you
want them to.