I have a server running Windows Server 2012R2. It is a domain controller. I have a router running DD-WRT version DD-WRT v24SP2-EU-US (08/19/10) std (SVN revision 14998). The router is configured with the following:
Domain Name: domain.office
Local IP Address: 192.168.1.1
LocalDNS: 192.168.1.101 (this had been 0.0.0.0)
DHCP Type: server
Static DNS 1: 192.168.1.1
Static DNS 2: 18.104.22.168
Static DNS 3: 22.214.171.124
Use DNSMasq for DHCP: Yes
Use DNSMasq for DNS:
Yes DHCP Authoritative: Yes
On the Services Tab:
Used Domain: Lan & WLAN
Lan Doman: domain.office
Additional DHCPd options:
server=/domain/192.168.1.101 (I've tinkered and am still tinkering with these)
What I'm fighting with is that I'm trying to get the clients to recognize the DC. I can ping the DC from the clients. I can ping clients from the DC, and I can do these things with just the name of the server or the client, as I would hope to do. But I cannot get the clients to find the DC as a DC. The DC is running active directory, and if I try to log on to one of the clients using a username that has not previously logged on, I get the message that it cannot locate a logon server. When I try to force a gpupdate, it fails, unable to contact a server. A server that can easily be pinged.
I have posted over on DD-WRT's forums and have received no answers. The puzzling thing is that right after I made the changes to the additional DHCPd Options and DNSMasq Options, as reflected above, I was able to update group policies on one computer. Not once, but three times, it worked. Then after I restarted the PC, it gives me the same old unable to contact a server message. I tried on another PC, doing ipconfig /release, ipconfig /renew, ipconfig /flushdns, and that PC has not once been able to reach the DC.
Here is my post over on DD-WRT, if it helps. I am continuing to tinker with it, to see if I can get it going, but the problem is that I know I am about to replace one of the PCs, and I won't be able to reach the Logon Server until I get this fixed. http://www.dd-wrt.com/phpBB2/viewtopic.php?t=269490
Oh, and the reason I was able to logon before but can't now is that I changed from using the DC as both DHCP and DNS server, to using the router, because my ISP had sent an email that I was running an openresolver DNS server. I am in no way an expert at this – quite the opposite. I know little about setting up a DNS server, and I'm actually quite amazed that I got it working, before, even though it did tick off my ISP. So any help is very much appreciated. I'm just not finding anything online about resolving this. The few things I have found so far, I have tried and haven't worked.
Thanks in advance for any help you can give. It is appreciated.