Forwarding LAN DNS requests to a LAN DNS Server?

[tkalfaoglu]

I'm trying to configure our LAN so that regardless of which DNS server is configured on the client, it is redirected to the DNS server on the LAN, say, at 192.168.1.191.. Of course, the DNS server itself needs to be able to reach out to the WAN itself for DNS queries.

How can I configure this?

Thanks! -t

[MHM Cisco World]

the DNS server in Host point to external or Internal DNS server?

[tkalfaoglu]

The clients may have remote DNS's configured, I wanted to transparently redirect them to the local LAN.
I already configured the DHCP server to advertise the LAN DNS server only, but in case the clients are "clever" and they have their own hard-coded DNS entries.. 

It's nothing sinister btw, I'm trying to block youtube ads 

[MHM Cisco World]

host receive IP from DHCP, force DHCP to push your DNS server IP to Host.

[tkalfaoglu]

Many thanks.. I did that, but I suspect some devices would try to directly reach out anyway.. I wanted to silently redirect them to the LAN's DNS..

[MHM Cisco World]

Try this' apply acl drop any udp/53 traffic to 8.8.8.8 or 8.8.4.4 

This make host ask DNS from this external server then if no answer it will failback to use your internal DNS server.

[Flavio Miranda]

Hi @tkalfaoglu 

 It would be DNS relay. Which device do you have today to be the dns relay server?