Doringblik
Well-Known Member
Hi everyone.
I am trying to troubleshoot our Server 2016 DNS. We have one server which is the AD-DC and DNS server. Not DHCP server as that is managed by our Unifi Security Gateway.
I am an un-qualified self taught IT generalist. I installed and configured the Server 2016 with active directory and the rest that goes with it, DNS etc, based on my general knowledge. It is functional and has been running fairly well for about a year now except for slow networking and delays in printing etc that I can only think has to do with poor DNS configuration. The test and it's results that I will be posting below seems to verify this. Yet I do not know how to fix these issues found in the test result. This is where your help, which as always is much appreciated, comes in. So, thank you in advance.
I ran the following test:
The results were as follows:
One more thing I think I should note is that I set the domain name the same as our external website and email domain name. That originally caused our email to not function but I fixed it with an A-record for the external domain and it's IP address. Not sure if this could be causing any other local issues.
That's where I am at now. Thank you once again in advance for your help.
I am trying to troubleshoot our Server 2016 DNS. We have one server which is the AD-DC and DNS server. Not DHCP server as that is managed by our Unifi Security Gateway.
I am an un-qualified self taught IT generalist. I installed and configured the Server 2016 with active directory and the rest that goes with it, DNS etc, based on my general knowledge. It is functional and has been running fairly well for about a year now except for slow networking and delays in printing etc that I can only think has to do with poor DNS configuration. The test and it's results that I will be posting below seems to verify this. Yet I do not know how to fix these issues found in the test result. This is where your help, which as always is much appreciated, comes in. So, thank you in advance.
I ran the following test:
Code:
dcdiag /test:dns /v /s:<DCName> /DnsBasic /f:dcdiagreport.txtThe results were as follows:
Code:
Directory Server Diagnosis
Performing initial setup:
* Connecting to directory service on server myserver.
* Identified AD Forest.
Collecting AD specific global data
* Collecting site info.
Calling ldap_search_init_page(hld,CN=Sites,CN=Configuration,DC=mydc,DC=co,DC=za,LDAP_SCOPE_SUBTREE,(objectCategory=ntDSSiteSettings),.......
The previous call succeeded
Iterating through the sites
Looking at base site object: CN=NTDS Site Settings,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=mydc,DC=co,DC=za
Getting ISTG and options for the site
* Identifying all servers.
Calling ldap_search_init_page(hld,CN=Sites,CN=Configuration,DC=mydc,DC=co,DC=za,LDAP_SCOPE_SUBTREE,(objectClass=ntDSDsa),.......
The previous call succeeded....
The previous call succeeded
Iterating through the list of servers
Getting information for the server CN=NTDS Settings,CN=myservername,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=mydc,DC=co,DC=za
objectGuid obtained
InvocationID obtained
dnsHostname obtained
site info obtained
All the info for the server collected
* Identifying all NC cross-refs.
* Found 1 DC(s). Testing 1 of them.
Done gathering initial info.
Doing initial required tests
Testing server: Default-First-Site-Name\myservername
Starting test: Connectivity
* Active Directory LDAP Services Check
The host d9bccbcf-9db8-40fc-a560-37f053f83a12._msdcs.mydomain.co.za could not be resolved to an IP address.
Check the DNS server, DHCP, server name, etc.
Neither the the server name (myservername.mydomain.co.za) nor the Guid DNS name
(d9bccbcf-9db8-40fc-a560-37f053f83a12._msdcs.mydomain.co.za) could be resolved by DNS. Check that the server
is up and is registered correctly with the DNS server.
Got error while checking LDAP and RPC connectivity. Please check your firewall settings.
......................... myservername failed test Connectivity
Doing primary tests
Testing server: Default-First-Site-Name\myservername
Test omitted by user request: Advertising
Test omitted by user request: CheckSecurityError
Test omitted by user request: CutoffServers
Test omitted by user request: FrsEvent
Test omitted by user request: DFSREvent
Test omitted by user request: SysVolCheck
Test omitted by user request: KccEvent
Test omitted by user request: KnowsOfRoleHolders
Test omitted by user request: MachineAccount
Test omitted by user request: NCSecDesc
Test omitted by user request: NetLogons
Test omitted by user request: ObjectsReplicated
Test omitted by user request: OutboundSecureChannels
Test omitted by user request: Replications
Test omitted by user request: RidManager
Test omitted by user request: Services
Test omitted by user request: SystemLog
Test omitted by user request: Topology
Test omitted by user request: VerifyEnterpriseReferences
Test omitted by user request: VerifyReferences
Test omitted by user request: VerifyReplicas
Starting test: DNS
DNS Tests are running and not hung. Please wait a few minutes...
See DNS test in enterprise tests section for results
......................... myservername failed test DNS
Running partition tests on : ForestDnsZones
Test omitted by user request: CheckSDRefDom
Test omitted by user request: CrossRefValidation
Running partition tests on : DomainDnsZones
Test omitted by user request: CheckSDRefDom
Test omitted by user request: CrossRefValidation
Running partition tests on : Schema
Test omitted by user request: CheckSDRefDom
Test omitted by user request: CrossRefValidation
Running partition tests on : Configuration
Test omitted by user request: CheckSDRefDom
Test omitted by user request: CrossRefValidation
Running partition tests on : mydc
Test omitted by user request: CheckSDRefDom
Test omitted by user request: CrossRefValidation
Running enterprise tests on : mydomain.co.za
Starting test: DNS
Test results for domain controllers:
DC: myservername.mydomain.co.za
Domain: mydomain.co.za
TEST: Authentication (Auth)
Authentication test: Successfully completed
TEST: Basic (Basc)
Error: No LDAP connectivity
Error: No WMI connectivity
[Error details: 0x800706ba (Type: HRESULT - Facility: Win32, Description: The RPC server is unavailable.) - Connection to WMI server failed]
No host records (A or AAAA) were found for this DC
Summary of DNS test results:
Auth Basc Forw Del Dyn RReg Ext
_________________________________________________________________
Domain: mydomain.co.za
myservername PASS FAIL n/a n/a n/a n/a n/a
......................... mydomain.co.za failed test DNS
Test omitted by user request: LocatorCheck
Test omitted by user request: IntersiteOne more thing I think I should note is that I set the domain name the same as our external website and email domain name. That originally caused our email to not function but I fixed it with an A-record for the external domain and it's IP address. Not sure if this could be causing any other local issues.
That's where I am at now. Thank you once again in advance for your help.