DHCP on Router relay Leases to Windows Server 2008 R2 DNS


I have a Sonicwall TZ 100 configured as a DHCP server and a Windows Server 2008 R2 configured to be a DNS server.  I would like to keep the DHCP server on the router instead of configuring it on the Windows Server.

Currently, the leases on the TZ 100 router are not being relayed to the Windows Server 2008 R2 DNS server and therefore the DNS server is not able to resolve computers on the LAN.  How do I configure the DHCP on the router and DNS on the Windows Server to work together?

Thank you for your help!
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provided your windows clients are aware that the win2k8R2 server is the dns server, they should be registering themselves via dns.

ensure that you dont have your DHCP server handing out your router's ip address as the DNS server, and then it has its own dns server set to your windows 2k8R2 server.

you can test this by checking to see where the DNS server is on one of your client computers. start > cmd > nslookup on one of your workstations provide you with the default server name.

if it is the windows2k8R2 server try running "ipconfig /registerdns" from the commandline. it will register your DNS records into the DNS server, and print out errors into your event log.
Krzysztof PytkoSenior Active Directory EngineerCommented:
Make sure that you have configured DNS servers list option on your router's DHCP configuration (this should be option no 006). Put there IP address of your W2K8R2 DNS server. After that you need to configure Forwarders on your 2008R2 DNS server to be able to access the Internet resources. On Forwarders list put IP address of DNS servers of your ISP or any publicly available like Google ( and/or then everything should work fine

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