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I just inherited a network with 2 Linux servers running Debian as a host OS, with VMWare hosting a number of VMs on both, including the domain controllers and some web sites.

Here is the issue, each server has a VM domain controller, AD and DNS are replicated across both controllers. DHCP on the first controller issues IP addresses for the entire LAN, 192. DHCP on the second controller issues IP addresses, 10.10 to a VLAN.

DNS forwarding on the controller correctly forwards internal requests to a web server hosted on a VM on the second Linux server.

Linux1 Hosts Controller2 Linxu2 Hosts Controller1 and VM web site.

Controller2 has correct DNS Controller1 has replicated DNS

VLAN 10.10 needs to resolve to a VM web site.

DNS lists both domain controllers 1 and 2.

The Forward Lookup Zones are identical except that the Name Servers are switched pointing to the opposite controller.domain

The Host A record points to the same VM

I had tried a Reverse Lookup Zone entry but may have entered it incorrectly. I also tried public DNS on the client but that returns RESOURCE_NOT_FOUND

At one point these changes allowed me to ping the public interface and tracert to same, but it would still not resolve to the web site.

Could someone help with what I think is a fairly simple oversight that I have missed?

controller1 - server1 controller1

controller2 - server2 controller2

  • Please post the results of ipconfig /all for both of your domain controllers. Does DNS forwarding work on one VLAN but not the other? Or is there some other reason that you mention the VLANs? – sippybear Mar 8 '18 at 18:15
  • The VLAN I have been told was intended to divert traffic from the 192 LAN. Ipconfigs coming. – htm11h Mar 8 '18 at 18:17
  • simple question, but does the dns service is bind to the two address ? – yagmoth555 Mar 8 '18 at 18:29
  • Do you have any DNS forwarders listed on the DNS Manager properties pane? Usually it should have the IP address of your firewall or some other forwarder. – sippybear Mar 8 '18 at 18:50
  • I am guessing that you are not talking about Conditional Forwarders, in the server properties pane in the Forwarders tab, their are two IPs one is 8.8.8.8 google, the other is a VOIP vendor. They are the same on both controllers – htm11h Mar 8 '18 at 18:59

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