Questions tagged [spn]
a service principal name (SPN) that is used to identify an instance of a service in a particular domain
56
questions
2
votes
1answer
28 views
Linux pod authenticate to MS-SQL windows server using keytab
Cannot get Kerberos auth working from linux to MS-SQL server on windows.
Added new user in AD.
New-ADUser -Name "user" -GivenName "user" -SamAccountName "user" -...
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0answers
105 views
2 SQL Server instances on a single machine: one can register an SPN, the other cannot
I have a Server 2019 machine that is running 2 instances of MS SQL Server. One is running as the default instance on port 1433 under the user NT Service\MSSQLSERVER. It successfully registers an SPN ...
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2answers
197 views
RDP to an Alias
I have a server that has since been decommissioned and I have some services that have been moved over to another server however these servers still point to the old server so I have set up a Cname for ...
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0answers
140 views
Extra SPN for Keytab breaks Kerberos authentication
I'm trying use Ansible against a set of Windows servers (through WinRM), and I've encountered some issues with some of them, namely the ones that have applications that support Kerberos authentication,...
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0answers
69 views
New SPN required when renaming server?
I am in the process of decommissioning a Win 2008 server, that runs an app that uses Kerberos authentication, and has an SPN created for our service account. The replacement server will be renamed to ...
3
votes
2answers
196 views
setspn does not affect Active Directory Users
I run the setspn command for specific user on Domain Controller.
C:\>setspn -s example/username.companyname.com username
Checking domain DC=companyname,DC=com
Registering ServiceprincipalNames ...
0
votes
1answer
266 views
Kerberos SPN for one FQDN on multiple servers
This is a bit of a weird one. I'm building a new web server hosted on a LAMP stack to replace an old IIS server. Its intended DNS name is currently occupied by the old server. I have SSL certificates ...
0
votes
1answer
841 views
Why would setspn -q return “no such spn found” when setspn -l finds the spn?
I'm attempting to troubleshoot why windows authentication is failing for a website hosted in IIS at a customer site. When executing setspn -l serviceUser to list the spns associated with a service ...
0
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0answers
409 views
Duplicate SPN for File Server Alias
I have two Samba4 AD domain members that serve a couple of replicated shares to users at two sites (same domain, different subnets). Bandwidth and latency don't allow for a clustered solution, so ...
0
votes
1answer
1k views
Duplicate SPN's - ADFS
Trying to setup ADFS with AD Connect. I get an error message when trying to add the ADFS service account. The error states that there is already an existing service account in the directory with the ...
0
votes
1answer
1k views
Web Application Proxy SPN Delegation
Hopefully this will be a quick one but I keep drawing a blank on how to do this even after some frantic searching online.
I have recently been tasked with adding resiliency to our WAP (Web ...
1
vote
1answer
1k views
SPN generation for multiple service account on a Web server
I am trying to achieve Azure SSO in my organisation. I have a web server hosting multiple websites and web application under those sites. Users access them in below fashion
https:// < SiteName >...
0
votes
1answer
437 views
Add Service Principal Name to Keytab file on Windows
What command can I run on windows to add a SPN to a keytab file on Windows? It seems all the documentation I can find is for linux.
4
votes
2answers
34k views
Get SPN error when trying to join a machine to a domain
I am trying to join a Windows Server 2016 VM called BORON to a domain which has a Windows 2012 R2 domain controller. The DC name is SNOWDROP.DUCK.LOC When I try to join I get this error:
The ...
0
votes
1answer
2k views
How to set an SPN for SQL Server on a Workgroup
I'm trying to remote connect to my Sql server 2016 instance on my home server running on a workgroup. I need to set an SPN to do this. All the guides out there seem to be related to setting the SPN ...
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0answers
52 views
Configure HTTP SPN for a domain user account on Windows Server 2012R2
I have a Windows 2012R2 Server and I would like to use Kerberos authentication with my IIS web applications. How do I set the SPN and map the users for HTTP and HTTPS services for a given use account ...
2
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0answers
139 views
Kerberos Double Hop - SQL2014 HA - MSA's
OK, so i'm at my wits end.
We have a system which works perfectly in our UAT environment (not HA) but will not work in live.
so the config is:
dns A record to iis box
binding in iis on :80 to ...
7
votes
2answers
7k views
creating an SPN from a linux build server
I'm setting up a process which would automatically create the SPNs for newly exposed service URLs. I am aware of how to create an SPN with Windows using the setspn -A command with the right priviliges....
3
votes
2answers
161 views
Are SPNs specific to Windows and Active Directory?
Are Service Principle Names specific to Active Directory on Windows? Or do they exist in Linux OpenLDAP / Kerberos KDC servers too?
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0answers
2k views
Issues identifying SPNs
Background
We are performing a server move. In the process, new servers and service accounts have been created. I'm getting two issues which I think are related to SPN's:
I've created some SQL ...
6
votes
1answer
13k views
Active Directory replication target principal name incorrect
I have a small 2 DC domain using Win 2008 R2 machines. Recently, one had to be restored using backup exec system recovery.
Now the two are failing replication. I have ran DCDIAG on both (see below) ...
3
votes
1answer
967 views
Kerberos Error APP_MODIFIED when using a CNAME DNS record
I have a production server, which I'll call CONTOSO\MachineA, running SQL Server. I have a development server, which I'll call CONTOSO\MachineB, running IIS. Both servers are running Windows Server ...
1
vote
1answer
126 views
Is it possible for two legs of a service to have the same SPN? Or at least clients refer to a single identity?
For a WCF service "SuperService", installed on two separate servers "Server1" and "Server2" - is it possible to have a single SPN identity string to which the WCF client "SuperClient" can refer?
Such ...
2
votes
1answer
3k views
List all kerberized SPN's in Linux
Is there a way to list/show all SPN's in an kerberized AD using a Linux Client?
In Windows one can use setspn -T <domain> -Q */* to get them. Is there something similar? Haven't found anything ...
0
votes
1answer
408 views
Creating AD SPNs with realmd/sssd on Cent7
Is it possible to use the system tools provided by realmd/sssd on a CentOS7 system to create and write out service principals for Apache and other servers? Or are we still reliant on other tools, ...
5
votes
2answers
7k views
Why does a SPN on a different host cause a server to lose its trust? How should I fix it?
I have a brand new server image that loses its trust as soon as it's joined to the domain. I suspect it's because of the duplicate SPN I discovered using the LDAP version of this Powershell script
...
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0answers
426 views
Setting up SPN for SSRS in a CRM load balance environment
I'm getting this exception randomly in a CRM load balance LIVE environment when running Reports from CRM.
System.ServiceModel.Security.SecurityNegotiationException: A call to SSPI failed, see inner ...
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0answers
362 views
Set SPN for all users in domain
I have a Windows 2008 R2 domain controller with more than 60 user accounts. Each time one of these users tries to connect to the DC authentication "falls back" to NTLM. Kerberos authentication fails ...
3
votes
2answers
6k views
Why should I not run setspn.exe on the domain controller?
I found several references (see below) on blogs that the setspn.exe utility should be run from either a client or server machine in the domain, but not from the domain controller itself.
http://www....
13
votes
1answer
31k views
Why is MS SQL Server Using NTLM Authentication?
Windows Server 2008 R2.
SQL Server 2008 R2 installed.
MSSQL Service runs as Local System.
Server FQDN is SQL01.domain.com.
SQL01 is joined to an Active Directory domain named domain.com.
The ...
1
vote
2answers
4k views
Windows Authentication KRB5KRB_AP_ERR_MODIFIED
Let me preface by saying, I've been on this issue for about a week and a half now and I can't figure it out. I think I'm close, but every time I've thought that so far, I was wrong. I've looked at ...
0
votes
1answer
1k views
IIS Credential Delegation for AppPool in Integrated Pipeline mode
I know there have been mkore than a dozen articles on this topic, but for some reason I have not been able to find a solution.
Server WEB1 has IIS7.5 with a site using Windows Authentication (kernel ...
3
votes
1answer
13k views
SPN settings in a ADFS 3.0 lab setup
I am a developer trying to understand authentication with ADFS (2012 R2), so I am trying to setup an ADFS lab.
I have found 2 guides:
doc1 - http://technet.microsoft.com/en-us/library/dn280939.aspx
...
8
votes
1answer
5k views
Active Directory 2012 LDAP Integration Service Principal Name Entry is Disappearing?
Creating Python Service to Query AD Attributes
I'm integrating our AD with web services running Python on linux using Python-LDAP over SASL(DIGEST-MD5) to query AD 2012 user attributes (division, ...
2
votes
2answers
1k views
Adding new SPNs to existing service ids
We have a tomcat server using spring-security kerberos to authenticate users to the webpage against active directory.
There are around 25 domain controllers.
The site has two CNAME based DNS aliases....
5
votes
3answers
14k views
Kerberos - Adding a SPN to a Domain User
When adding a new SPN into the Kerberos domain, you have the option of mapping the SPN to a user. In general, I join the domain through Integrated Windows Authentication, and this creates a new ...
3
votes
1answer
162 views
What SPNs are needed for an intranet web service that reads remote registries
Imagine a website that shows the value of a remote registry key, live, such as the version of the anti-virus definitions on a remote PC. To be clear, there are 3 computers involved, the web server ...
3
votes
1answer
700 views
SPNs and Kerberos Delegation
I would like to check my understanding. This is a fully hypothetical scenario below as I am currently studying for a certification.
I have an IIS App Pool with a basic website, which accesses data ...
0
votes
1answer
2k views
Multihop Kerberos delegation on IIS7 / Windows 2008
So here I am again dealing with probably the number one support question on IIS, SPNs. I am not a novice when it comes to this, having lived the pains of getting SSRS front ends to delegate for SQL ...
8
votes
1answer
20k views
“setspn -s” vs. “setspn -a”
According to Setspn Overview it's discouraged to use Setspn -A to add an SPN record and it's suggested to use Setspn -S instead.
It's said that Setspn -S checks whether the SPN already exists before ...
6
votes
3answers
20k views
Will kerberos work with CNAMEs if I have the SPN created for the A record as well?
We are currently setting up a SQL 2012 environment and it will be used for storing data that will be accessed by SSRS in sharepoint integrated mode. We will be using Kerberos for authentication.
...
4
votes
1answer
890 views
Kerberos issues after new server of same name joined to domain
Environment: Windows Server 2012, 2 Domain Controllers, 1 domain.
A server called Sharepoint1 was joined to the domain (running
Sharepoint 2013 using NTLM).
The fresh install for Sharepoint1 (OS and ...
1
vote
1answer
5k views
Clear SPN changes from server cache
We have in house IIS apps built on ASP .Net 2.0 running on IIS 7.5- Server 2008 R2 x64. Back end is SQL 2005. It uses Kerberos (Windows integrated) authentication. Once in a while we need to change ...
0
votes
1answer
3k views
SPN's, Kerberos and IIS
I have a dns alias of MyWebServer, which points to the ip of a win 2008 r2 box running iis 7.5.
I have the correct HTTP spn's set up for a domain user which has permissions to delegate to a nominated ...
1
vote
2answers
8k views
IIS and Integrated Windows Authentication - login doesn't work for domain.com, works for IP address, localhost, 127.0.0.1
I've installed Windows Server 2003 R2 and IIS role (no Active Directory role).
I've setup a virtual directory named 'test' and under Security tab of the 'test' Virtual Directory I've disabled the ...
11
votes
2answers
32k views
Permissions to create an spn
According to some of the documentation I've read the service account for SQL server will create an SPN when the database engine starts up, allowing for kerberos authentication. I haven't been able to ...
3
votes
1answer
197 views
Why deploy Kerberos for Exchange 2010 SP1 RU3?
The first version of Exchange 2010 to support Kerberos is SP1 RU3. It does this through the RollAlternateServiceAccountCredential.ps1 commandlet.
Besides implementing "better" security, does this ...
5
votes
2answers
16k views
help using setspn and ktpass
I'm trying to set up the SPNs and create a keytab file for tomcat kerberos spnego Single sign on.
the server running tomcat7 is ubuntu-ad1.wad.eng.hytrst.com
the KDC is kerberos.wad.eng.hytrust.com
...
1
vote
1answer
6k views
RDP from 2008 R2 through a tunnel fails
I'm trying to RDP from a Win7 to a 2008 R2 machine through a tunnel (think SSH, but not exactly).
It fails and the following is in the 2008 R2 (destination) event log:
System Event Log, LsaSrv ...
2
votes
2answers
3k views
need help in setting up SPN for Kerberos Authentication
I am using IIS 7 for setting up a website under windows authentication. I am seeing authentication issue which i am almost sure that it is related to kerberos issue and i am wrongly setting up SPN. ...
