Why do Windows Trusted Domain DNS queries not work on Windows 7? - Server Fault
After you implement AD DS and DNS you will need to join all machines in to the domain, including error: The trust relationship between this. Active Directory Trust Cannot Continue error (click for original The trust relationship cannot be created because the following error occurred. A forest trust relationship between the two organizations Active Stub Zone – How to configure a DNS Stub Zone in Windows Server . group of a trusting domain it errors saying it couldn't find a domain that can authenticate.
This second organization is located in Germany, and outfitted their hardware with German versions of Windows Server.
This already added a nice layer of complexity for most people, but luckily I know my German. Now, the time had come to build a trust relationship between the two Active Directory environments living in their own Active Directory forests. They wanted to give access to their resources to the German people.
This calls for an outgoing forest trust one-way. Cannot continue The trust relationship cannot be created because the following error occurred: Either the domain does not exist, or network or other problems are preventing connection. My troubleshooting Troubleshooting name resolution I quickly glanced at the DNS configuration and noticed stub zones were created at both ends to allow for name resolution. Troubleshooting the network I started with troubleshooting the network connectivity between the two forests, and thus, the two datacenters.
I downloaded PortQry v2 and checked all the ports between each and every Domain Controller.
Although UDP responses were generally a bit slower, every kind of necessary traffic flow seemed to be available. The network is not preventing the trust connection. In iterative transfers, a secondary DNS server only pulls changes since the last zone transfer.
The secondary servers keep track of zone changes using the SOA serial number.
This can cause zone transfer issues with Windows DNS because not all updates reside in the main zone file. So when configuring a firewall, expect packets in the zone transfer to come from any port above Configure the zone to allow transfers only to servers whose name appears in the Name Server list, as shown in Figure 3.
By placing a secondary server on the Name Server list, you also enable the primary master to send notifications of changes to the secondary server.
Disable zone transfers completely at secondary servers unless you want another secondary to pull the zone from it. Before you make the switch to using AD-integrated zones, remove secondary zones from any DCs. If you forget to do this, you put the DC in the awkward position of getting a replica via standard zone transfers and a copy in AD. The most current version of BIND and dig is 9.
Get the Win32 binaries from www. Using dig, you can initiate full or incremental zone transfers and see the results. For example, to test an incremental transfer, first query for the SOA record at the primary master to see the current serial number.
For example, if the SOA serial number is 88, the dig syntax to do an iterative transfer of the last zone change would be similar to the code shown in Listing 1. The dig syntax to transfer the last name change iteratively. To assure accurate entries, the Netlogon service updates DNS hourly using the content of a file called Netlogon. This hierarchy is important because domain members query for SRV records at specific locations. If these lookups fail, the machine gives up and uses local logon credentials.
Modern Exchange relies on DCs to store information about the Exchange organization, and uses the Global Catalog extensively to support messaging routing and to help down-level Outlook clients expand the membership distribution lists. By the same token, newer Outlook clients can be configured to use local Global Catalog servers to obtain address lists, so they rely on DNS as well. If one of the interfaces connects to a private network, such as a dedicated backup network, then clients will fail when they get that IP address, forcing them to go back to DNS to get another SRV record and slowing down the logon process.
This can also happen if you have a management card in the server that presents its network or modem interface as a standard network connection which DHCPClient insists on registering. Click image to view larger version. It gets the name of this DNS server by way of delegation. In delegation, the parent zone contains NS records that specify the names of DNS servers in the child domains along with A glue records that contain their IP addresses.
The wizard walks you through selecting the child domain name and identifying name servers in the child domain. If someone takes down a child DNS server for maintenance, or decommissions it entirely, without notifying the DNS administrator in the parent domain, the delegation records in the parent zone become invalid.
This is called lame delegation. You can also get lame delegations by blocking zone transfers to a secondary server if the secondary server has an NS record in the parent zone. This sometimes happens during an overzealous security sweep. Lame delegations can also cause connection failures when desktops in one domain try to connect to servers in other domains, although this might not be obvious right away if you use WINS. If you deploy Windows DNS servers, you can avoid lame delegations by using stub zones.
The parent DNS server periodically refreshes the stub zone contents, drastically reducing the chance of having a lame delegation. You can download DNSLint from download. DNSLint is a command-line utility that does two sets of tests: Figure 5 shows an example. This essentially makes your internal DNS server a slave of its forwarders; so specify two or more forwarders and try to use servers in different subnets, if possible.
DNS Server properties showing the option to avoid using recursion when forwarding. If you allow your primary public DNS server to accept recursive queries and cache the results, you open yourself up for cache pollution.
It finds the name server for deviousdomain. In return, it gets the host record but it also gets a flock of name server NS records for domains such as Microsoft. You should also enable cache pollution filtering in the DNS server Advanced properties. Do this for any server that accepts recursive queries, internally or externally.
Some of the restrictions apply only to the gTLD server operators, but the suggestions and requirements for maintaining a secure, safe DNS platform are worth your consideration.
10 DNS Errors That Will Kill Your Network -- relax-sakura.info
Also, take a trip to www. Any machine can assert itself as an existing host and overwrite the A record with a new IP address.
This essentially allows a machine to hijack the DNS records of another machine.
If you want to use dynamic updates for a zone, integrate the zone into AD and permit secure updates only. This requires a client to use Kerberos to validate its identity, then initiate a secure transaction to obtain a signing key that it can use to digitally sign the update request. Other DNS servers support secure dynamic updates, but not using this method. These servers use a form of DNS security that requires a shared secret key. If you do this as a habit, the test becomes a reflex. Take a couple of precautions to keep from getting fooled by caching.
You can get interesting problems if you remove a member server from service but forget to remove the corresponding A and PTR entries from DNS. This can be difficult to troubleshoot if you reference multiple servers with the same host name. Windows DNS uses round robin load sharing; so if you take a server down for maintenance and forget to remove the A record from DNS, not every client gets an invalid A record. Windows DNS also uses round robin for cached entries, so flush the cache if you take a DNS server down for maintenance.