A domain controller is a server in a Microsoft Active Directory or NT4 domain that is responsible for central authentication.

learn more… | top users | synonyms (1)

2
votes
2answers
31 views

Which Ports need to be accesable on a Domain Controller for Clients to logon?

We are currently segmenting our network. We will move the servers in another subnet than the clients. Of cause the clients still need access to the domain controller to authenticate against it. I ...
5
votes
3answers
15k views

How to temporarily stop time syncing with domain controller?

I wish to do some testing on my local machine which requires me to put the date forward a year. So I can test some stuff in SQL Server (i've found it not possible to override the sql server time). ...
0
votes
0answers
4 views

Windows 10 Connect to Disconnected user session without password as Domain Admin

I have a Windows 10 PC (Virtual Machine) on a domain and a domain user logged in to it (albeit disconnected). This user has started some applications that have caused a massive consumption of network ...
0
votes
1answer
56 views

Seizing a domain from dead primary domain controller

My old Primary Domain Controller died after a series of power problems. I tried to follow this set of instructions http://kpytko.pl/active-directory-domain-services/seizing-fsmo-roles/ to get another ...
4
votes
3answers
3k views

Windows server 2012R2 as additional domain controller along with Server 2008R2 fails

On running ADPrep passes all prerequisite, but fails in the last stage with the below error: ADPrep execution failed --> System.ComponentModel.Win32Exception (0x80004005): A device attached to ...
0
votes
1answer
25 views

Connect Access Domain Controller Over VPN

We have a remote base which we would like to connect to our main office. We bought a VPN capable router thinking this would dial the vpn and our remote PC would connect seamlessly. Unfortunately ...
1
vote
1answer
19 views

Exchenge 2010 server is not finding GC server in the domain

Exchenge 2010 server is not finding GC server in the domain even the domain controler . All Domain controllers are Windows Server 2012 Std. In the atest.local forest I have 3 DC and all 3 are GC: PS ...
0
votes
1answer
46 views

DC3 doesn't replicate with newly added DC1

[DC 1 - LOTUS] [DC 2 - IRIS] [DC 3 - FLORA] The picture above shows my domain network connection. My original DC1 was PYRUS, due to some reasons, it is dead and be replaced by LOTUS. I Seize all ...
1
vote
1answer
57 views

WMI “Access Denied” to Read Only Domain Controller

From a management machine using wbemtest, we are able to successfully connect to a remote Read-Only Domain Controller that is running Windows Server 2012 R2 Datacenter with a user who is a member of ...
1
vote
1answer
89 views

Issues adding new DC to network after main DC broke down

What I try to do should be something simple but I made in ended up bad. We have a virtual network and virtual machine set up on Azure East Asia region datacenter originally. Then, we decided to move ...
8
votes
3answers
7k views

Server 2012 R2 Active Directory Domain SRV dns records suddenly disappeared

I have a test domain that I recently configured. All of a sudden, no users can log in except those with cached credentials. The domain includes two domain controllers that are both global catalogs ...
3
votes
1answer
2k views

Linux Client Active Directory Authentication stops working when failover

I have an issue with Linux clients trying to AD authentication by targeting a DNS name (corp.example.com). I have 2 Domain Controller servers DC1(10.0.0.3/24), DC2(10.1.0.3/24) both domain controllers ...
0
votes
0answers
20 views

A domain controller in Azure ends up public on the Internet with no firewall - is it compromised? [duplicate]

I'm helping a customer stand up an Azure environment and they decided to stand up a server (DC) on their own without asking for help. The only access method is supposed to be IPsec, but they forgot ...
0
votes
3answers
34 views

Reconnect to Domain Controller after temporary disconnect in Server 2012

I have 5 RDP Servers running Windows Server 2012. Our Domain Controller was temporarily taken off of the network for 5 minutes due to a bad switch. Even after it has been brought back online, when ...
0
votes
2answers
27 views

Targeted GPO deployments from Samba (4) DC

I've seem to be stuck. I come from a mostly POSIX background, & thrown into the deep-end on this one, so learning as I go along - so not sure if there's no solution, or if it's my own Dunning-...
0
votes
1answer
32 views

DC Replication over VPN Server 2012R2

I Have two sites right next to one another connected using Draytek routers an IPSEC secure vpn tunnel. One site had all the servers the other none. I installed a new DC on the main site them moved ...
1
vote
1answer
70 views

Inconsistent winbind info on Samba 4 AD domain controller

I've setup a Samba 4 AD domain controller on Debian Jessie (samba 4.2.10). Everything's working fine, except that winbind gives wrong user/group information. I have a sample user "testuser" and a ...
4
votes
2answers
8k views

Active directory member servers cannot locate domain controller

Several hours ago, a handful of our member servers became unable to authenticate against the two domain controllers they should be using. The member servers and DC are located in the same datacenter, ...
2
votes
1answer
2k views

Read Only Domain Controller not replicating after writable domain controller outage

I have a RO domain controller that replicates with a writable DC which is at another site. The other week the writable DC was out for about 2 days because of maintenance at that site. After this ...
0
votes
1answer
9k views

Why gpupdate fails?

So I have a Windows Active Directory Domain with two domain controllers, DC1 and DC2, both running Windows Server 2008 R2. DC1 is the primary DC holding all FSMO roles. It was functioning all right as ...
1
vote
2answers
170 views

smbclient: Connection to localhost failed (Error NT_STATUS_CONNECTION_REFUSED)

until yesterday I had a functioning Active Directory Primary Domain Controller running on a raspberry pi. Now it seems I cannot get the 'samba' service to listen at all. This is since performing an ...
4
votes
1answer
1k views

Windows Server 2003 DC migration to 2 x 2012 R2 DCs - DCDiag error = Advertising: SERVER IS NOT RESPONDING or IS NOT CONSIDERED SUITABLE

We are upgrading our single 2003 domain controller (DC1) to two 2012 R2 controllers (DC2 in Sevenoaks and DC3 in Manchester (different site in Sites and Services for Manchester)). DCpromo (the wizard ...
16
votes
1answer
22k views

What needs to be done after a Domain Controller crash?

Assuming that at least two domain controllers were present in the domain to start with, what steps need to be taken to make Active Directory healthy after a domain controller crash?
2
votes
1answer
21 views

Adding an IPv4-only Domain Controller to an existing pool of Domain Controllers with both IPv6 and IPv4

We have an existing pool of Windows 2008 R2 Domain Controllers on-premises. These Domain Controllers have IPv6 and IPv4 configured. Now we need to add another Domain Controller that will seat on an ...
0
votes
1answer
1k views

DNS name server IP keeps reverting back to unknown for forward lookup zone

I'll start by saying I have not worked much with DNS and DC's. I'm a programmer who is trying to build out an environment with a domain to simulate a production scenario. My issue is the forward ...
3
votes
2answers
10k views

Permissions for Scheduled Tasks on a Domain Controller

I'm trying to run a Scheduled Task on a 2008 R2 Domain Controller and all was well until I set it into the production environment. I'm running the task as a Domain User that's defined in the "Log on ...
2
votes
1answer
65 views

Guidelines and Best Practice: Prep to Temporarily Shutting Down an Active Directory Domain Controller

1 AD domain. 3 total Domain controllers, all on 2008 R2 The primary DC (with FSMO roles) is being moved to a new office and it will be offline for a maximum of 3 days. This DC also serves DNS but ...
0
votes
1answer
2k views

Active Directory Domain Service started then stopped after dcpromo

I use Windows Server 2008 to install Active Directory follow this guide After a restart, I can only login to local account,not domain account due to the error No logon server are available! I check ...
-1
votes
1answer
44 views

How should I manage my cloud-hosted virtual networks/machines?

I am currently hosting multiple production projects in Microsoft Azure. Each project is configured with a separate virtual network with two Windows VMs to act as web servers, and one server to act as ...
3
votes
1answer
1k views

Set up trust between Azure AD and local AD

We are moving some VM's and Cloud Services into Azure, but we need those services to still connect back to the AD of our partner. I'm a developer, not a sysadmin, so I'm not sure how to do this, or if ...
0
votes
0answers
63 views

The schema master did not complete a replication cycle after the last reboot

I'm attempting to add a Windows Server 2012 Domain Controller to an Existing Windows Server 2003 network, and then following that, will migrate it to be the domain master. I'm following this tutorial ...
0
votes
0answers
83 views

Suddenly i can not join Windows clients to Samba PDC anymore

Some years ago i configured a Primary Domain Controller through Samba and LDAP (slapd) on an Ubuntu machine (13.10) at 192.168.69.203 which should be accessible by the NetBIOS name SRV1. I must note i ...
2
votes
1answer
121 views

Secondary domain controller not functioning when primary domain controller is not reachable

We are small business intelligence company and we have a head office and a branch office. I have active directory running on windows 2012 R2 in the head office and another active directory running on ...
0
votes
0answers
33 views

How to get remote users to authenticate?

We have some remote users who are rarely on the company LAN. They may be remote for six months or more during a year. Every so often we encounter the problem of errors like: "There are currently no ...
-2
votes
1answer
92 views

Active directory 2012 password policy

I have a windows server 2012 R2 active directory environment running in my office. I have a primary domain and a child domain. Both the domains have password complexity enabled. Active directory ...
0
votes
0answers
38 views

Design Recommendation to Future Proof Active Directory

We are currently setting up the first Active Directory for a business within a brand new private equity group. This private equity group owns 4 businesses and will be acquiring many more. I ...
0
votes
2answers
28 views

What could be the reasons to configure LAN clients to use the server IP as DNS server in a domain controller Windows network?

This is rather a basic networking question, but I have found this configuration on several domain controllers with Windows Server, and I think ServerFault should be the proper site to ask. What are ...
1
vote
1answer
49 views

Can I use ansible to startup jboss service in domain mode?

I used sh /usr/local/jboss/bin/domain.sh manually, and jboss works fine. When I use ansible to start jboss automatically, jboss log always shows "Container is down". File /root/startup_jboss.sh : #!...
22
votes
6answers
2k views

What causes a workstation to lose trust with the domain controller?

I've received the error several times on Windows 7 Workstations and Laptops where it loses trust with the domain controller, and I know how to fix it, but why does it do that?
0
votes
1answer
118 views

Server 2012 stopped accepting computers joining to our domain with error 53: the network path was not found

We have Windows Server 2012 R2 Standard as our DC. Several workstations were added to our domain successfully. But then (I cannot determine what exactly could be a show-stopper) it stopped accepting ...
3
votes
2answers
52 views

Hyper-V standards, replication before or after exchange

I'm currently building my own lab to improve, however I have a couple of general questions. I have 2 dell R710 servers, with 2012r2 and the hyper-v role installed. What I want to do is build up 4 ...
0
votes
0answers
94 views

All options greyed out when trying to configure Active Directory Domain Services Windows Server 2012 R2

I am configuring the first domain controller for a new domain. The install of Active Directory Domain Services seemed to go ok, but when I attempt to configure the domain controller it gets stuck on ...
0
votes
2answers
39 views

Remote Desktop Services role - Do I need it in order to use MSTSC (RDP/RDC) in my domain?

Greetings and thanks for reading (apologies for the length). I'm a new Sys Admin and I have a (potentially silly) question for the more seasoned veterans. I'm migrating our primary Domain Controller ...
0
votes
0answers
17 views

Issue with creating a new forest and promoting a domain controller

I am creating a forest and domain controller for the first time. The error I get is: Error determining whether the target server is already a domain controller: Starting a command on the remote ...
1
vote
0answers
208 views

How to disable Null Session Enumeration of the DC?

I am a sysadmin for a company, and we just had a Penetration Test done on our internal network, the team discovered that it is possible to perform query\enumerate our DC (Server 2012) for information ...
0
votes
1answer
22 views

New site is not listed when adding new domain controller

I inherited this network and I'm trying to figure out what I am missing. I created a new site in Chicago and I want to add a domain controller to it but the new site is not listed when I go to ...
1
vote
4answers
80 views

Will cached domain credentials stay working if machine never re-connects to domain?

I have researched this thoroughly, and cannot find the answer I am looking for. A company I recently left is going through a bankruptcy. They have already auctioned off most the IT equipment, ...
0
votes
0answers
14 views

Running Session Virtualization in Server 2012 off a single server box

My technical level is below average here. I have an HP (Proliant DL380 Gen9 Xeon e5-2620) machine running Server 2012 and Wyze thin clients off which I want to run 10 full Windows 8 Remote Desktop ...
-2
votes
1answer
101 views

Can't log in to the DC remotely as Admin

I need some assistance ASAP my old IT Manager who got fire mess up our DC. Now I can' login to DC remotely as Administrator. Non of the 5 Windows servers that I have. This is the error message " To ...
0
votes
1answer
59 views

Explain how FRS replication backup works

Please explain me why I have to add just some registry keys to repair sysvol-replication. I mean, it is like file-based and I want to backup it before I change anything. There are some NtFrs 13568. 2 ...