Kerberos is a computer network authentication protocol, which allows nodes communicating over a non-secure network to prove their identity to one another in a secure manner. Its designers aimed primarily at a client–server model, and it provides mutual authentication — both the user and the server ...

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Kerberos kadmin command in Windows [on hold]

I would like to work with Kerberos in Windows. I have installed MIT Kerberos and found it to work fine. However kadmin , 'kadmin.local' does not work, rather it is not found. I searched for the ...
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1answer
42 views

Ldap+kerberos authentication through AD

Is it possible to configure ldap+kerberos authentication on a linux machine without joining it to windows domain? I have to create a pool of VMs using RHEVM with a pretty short lifetime and I do not ...
0
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1answer
5 views

Slave Kerberos behind NAT - kprop fails: Incorrect net address while decoding database size from client

I want to synchronize MIT Kerberos database from master to slave, which is in a different geographical location. kprop synchronization fails because of a NAT. Is there any solution to have kprop ...
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33 views

Kerberos, Active Directory, and Linux/Unix Servers

I have done some research on the topic, but I can't quite find a straight answer to my question. Please tell me if my understanding is correct. Kerberos can be used as the bridge between a ...
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1answer
37 views

Ubuntu 14.04 Active Directory auth fails after static ip config

I'm having 6 Ubuntu 14.04 servers that are joined to active directory (2003 domain functional level 2008r2 schema) All of the servers work's fine when network interface is configured to use DHCP. But ...
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10 views

give serverprincipalname read write permissions to security group members

What are the settings for the group to make the following change? I need to create a group that can be used to grant: serviceprincipalname SELF Read serviceprincipalname SELF Write to its members. ...
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18 views

Authentication fails when using ARR to load balance Lync 2013 internal web services

I'm using Application Request Routing 3.0 on Windows Server 2012 R2 to load balance the internal web services on a Lync 2013 front-end pool; I'm not using it to reverse proxy the external web services ...
4
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1answer
36 views

At which point becomes a changed computer group membership active?

When adding a computer object to an AD group, at which point in time does the group membership become active? Is there some kind of kerberos refresh interval (similar to group policy refresh)? I ...
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15 views

Client not requesting Kerberos authentication

My client is not requesting Kerberos tickets, but does when using fiddler. I was then advised not to use fiddler and use Wireshark, using this I can see that the client is sending an NTLM ...
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19 views

Establish FAST encrypted channel between linux client and windows server

I am trying to setup windows server for FAST encrypted channel support to test OTP pre authentication in kerberos. I have already tested on linux machine by deploying KDC using krb5-1.12.1 source ...
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3answers
67 views

Alternatives to Kerberos for passwordless server access

I have a bunch of Linux servers and three Windows servers 2008 R2. I would need a solution which would enable passwordless SSH login from each of those servers to all others. I could do this by ...
0
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2answers
24 views

kadmin cannot list principals “requires list privileges”

I can authenticate fine via kadmin however cannot list principals? [root@server ~]# kadmin -p admin Authenticating as principal admin with password. Password for admin@org.domain.com: kadmin: ...
2
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1answer
86 views

Why is sshd engaging PAM still?

Background/Behavior is: if you ssh to box via and GSSAPI/Kerberos succeeds and you have a local user in /etc/passwd, you login fine per below PAM config. All Good there. But if you don't have a ...
0
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1answer
34 views

Setting up Secure Hadoop Cluster - Kerberos security

I setup a HDP 2.2 cluster successfully (1 NM, 3 DNs and 1 client). User accounts to access HDP cluster are created in client and checked these users can submit jobs, by SSH to client node and run ...
0
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1answer
53 views

[root@pcm-ipa-01 tmp]# klist klist: No credentials cache found (ticket cache FILE:/tmp/krb5cc_0)freeipa kadmin admin principal not found

I have installed freeipa on centos and after restarting the service seems to have lost authentication for "kadmin" [root@pcm-ipa-01 ~]# kadmin init Authenticating as principal root/admin@MY.DOMAIN T ...
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0answers
19 views

JBoss SPNEGO Authentication Renewing Server Kerberos Tickets

We have successfully configured SPNEGO with our webapp on JBoss EAP 6.2, Windows Server 2008, and IE10 using JBoss Negotiation. What is best operational practice for renewing the ticket issued to ...
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0answers
9 views

Why does the server ID need to be sent in AS-REQ?

In the kerberos protocol, in the AS-REQ, you send your username and the server you want to use. The AS doesn't seem to use the server ID in the AS-REP, and in the TGS-REQ, the client sends the ...
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0answers
18 views

Kerberos and SQL server connection string

I am working on a project to migrate a legacy ASP program (NOT .NET!!) from W2k3 to W2K12 R2 (also from SQL server 2K -> 2K12). The ASP program file has a config for SQL server connection string which ...
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1answer
23 views

Password Delegation with Windows 2008 Server Trusts?

I have a trust setup between two Windows 2008 Active Directory forests. My domains are "local.ad" and "remote.ad". All of my corporate users belong to the remote.ad forest. I have to add the ...
1
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0answers
29 views

Kerberos Errors

Need help with the below error. I haven't been able to find much that has helped. Event Source: Security-Kerberos Event ID: 4 Qualifiers: 16384 Version: 0 Level: 2 Task: 0 Opcode: 0 Keywords: ...
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0answers
25 views

Reporting Services 2008 and kerberos delegation/impersonation

I've spent quite some time configuring the use of Kerberos and Windows 2008 SQL Reporting Services - I've registered all the SPNs, configured the various authentication options in the XML files and ...
0
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2answers
78 views

Windows Integrated Authentication with IIS Farm and subapplications

Assume the following site layout www.contoso.com - runs as CONTOSO\sitePool www.contoso.com/subSite1 - runs as CONTOSO\subPool1 www.contoso.com/subSite2 - runs as CONTOSO\subPool2 The pages should ...
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2answers
120 views

Possible to authenticate Samba via Kerberos but without domain-join?

With a Kerberos config file... [realms] DOMAIN.COM = { kdc = dc1.domain.com admin_server = dc1.domain.com } ...it is possible for Linux to talk to Active Directory for password ...
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2answers
71 views

Apache/mod_auth_gss authentication failure

Sorry if this is the wrong stackexchange site for this. Based upon the documentation (for reference I also used this blog post) I have this in httpd.conf: # Increase max size of HTTP request headers ...
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104 views

IIS 8.5 / Windows Authentication - 401 response on certain clients

We are running a Tomcat application behind a IIS 8.5 Windows Authentication Proxy, the redirect is via the tomcat AJP connector. We now have the problem that on certain clients, the authentication ...
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0answers
16 views

Kerberized root user on RHEL 5/6

I'm currently involved with getting NFSv4 and Kerberos. We've decided to bite the bullet and try and make the transition. Our environment is: Windows AD LDAP auth on Linux against said AD. ...
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0answers
67 views

kinit won't connect to samba4 domain controller, cannot resolve hostname

i have set up a domain controller on my virtual machine. At first i will post all important configs, so you know what works already. Hostname: affenhirn2 Domain Name: example.affenhirn2.local (i am ...
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0answers
12 views

Setting environment variables based on passing Require directive

I finally succeed on configuring Apache as a SPNEGO reverse proxy for my app, and I'm using the AUTHORIZE_SAMACCOUNTNAME, AUTHORIZE_CN and AUTHORIZE_MAIL to figure out some information about the ...
0
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0answers
39 views

Why does Hyper V differs in authentication methods for live-migration and replication

Hyper-V provides different authentication methods for replication and live migration (2012 R2 based). Live Migration is using CredSSP and Kerberos and replication Kerberos or PKI-based authentication. ...
1
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0answers
10 views

Kerberized NFSv4 share (deleted) after token expiry

I set up a NFSv4 server with Kerberos authentication and it runs well. However, some users stay logged in for long times such that they have to renew their tickets after some days. If during the time ...
1
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0answers
33 views

How can one determine what Kerberos key encryption algorithms are supported on a Cisco IOS device?

When attempting to load an SRVTAB over TFTP, I receive an "Unsupported keytype" error: abc(config)#kerberos srvtab remote 1.2.3.4 abc.srvtab Loading abc.srvtab from 1.2.3.4 (via Vlan123): ! [OK - 121 ...
5
votes
1answer
92 views

How can one enable DES-encrypted keys on an Apple KDC?

We are running a KDC on OS X 10.10 Yosemite, to which we have added a service principal for remotely accessing a (legacy) host: $ kadmin add -r host/a.b.c.d@REALM Since the host only supports ...
3
votes
1answer
101 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
27 views

Kerberos Authenticator Encryption Type NULL

So, I've been working on a SSO enabled XMPP application on our network for a couple weeks. I have 95% of the bugs worked out, and everything is running smoothly. The problem is that I have a couple ...
2
votes
1answer
20 views

What is “Ticket Options” Referring to in Domain Controller Event Logs?

I'm trying to figure out what Ticket Options is referring too within this event log off my domain controller. It is in response to a kerberos authentication request. AgentDevice=WindowsLog ...
2
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0answers
43 views

CUPS remote print queues

In my network, there are multiple printers over many locations, all connected to a single CUPS server via whatever protocols they require. Client machines on the network need to print to the printers ...
5
votes
3answers
321 views

In a Windows PKI, what is a Workstation Authentication CA Template used for? What happens if it expires?

Many workstations have an expiring computer certificate that was issued using the Workstation Authentication CA template. The CA of this template expires in 2 days. I've deployed a new CA, with an ...
2
votes
1answer
197 views

IIS 7.5 web application failing with NT Authority\Anonymous Logon

I am finding various google results, but none seem to fix my problem. I am setting up a new WINDOWS 2008 R2 box at work that is to communicate with an existing SQL 2012 box via web tools running in ...
0
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1answer
399 views

ADFS & WAP with SP 2013 - Login redirect to blank page

I set up ADFS and WAP on server 2012 R2 in order to login into SharePoint 2013. I follow several how-to, and all seems fine except one thing : When I log into ADFS form, its ok, then I land on a blank ...
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0answers
27 views

Active Directory - Windows Kerberos integration

I integrated ActiveDirectory in Windows Server with Kerberos in Ubuntu machine I am able to generate tickets for the ActiveDirectory users in Ubuntu's Kerberos using 'kinit' command. Now would like to ...
2
votes
2answers
361 views

Putty Kerberos/GSSAPI authentication

I configured a few Linux servers to authenticate with Active Directory Kerberos using sssd on RHEL6. I also enabled GSSAPI authentication in hopes of passwordless logins. But I can't seem to get ...
0
votes
1answer
216 views

Kerberos Event 4 servername showing username

We have a .Net Windows Service that uses a Httplistener and authenticates requests using Kerberos. When users are connecting via their browser, an error in the users event log shows a Kerberos Event ...
1
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1answer
91 views

Kerberos SSH Man-in-the-Middle for Data Sniffing

Kerberos clearly keeps an attacker from getting a user's credentials in an SSH man-in-the-middle scenario (one where the attacker has gotten the user to trust their server's public key and redirects ...
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0answers
35 views

password ipa idm redhat change itself

I am new in Kerberos and I don't know why the password change itself I create another account but the problem persists after generating keytabe in IPA client the password of admin IPA idm redhat ...
0
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1answer
70 views

Does Active Directory alone is not enough to secure hadoop?

I am trying to secure Hadoop environment installed in windows. So basically I started to analyse how to secure a Unix-based hadoop cluster. Have gone through various links related to Kerberos and ...
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0answers
109 views

Cross-Realm trust verify failed with 'netdom' command

Question 1: Am having my ActiveDirectory in Windowsserver 2012 machine - its domain name is AD-DEMO.LOCAL Kerberos admin-server is in another Ubuntu machine - its realm KERBEROS.COM Added trust in ...
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0answers
87 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 ...
0
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0answers
35 views

iis 7.5 application in webfarm using kerberos authentication not working for external users

I have setup my application to run using kerberos authentication,,it works fine at our end but when the application user tries to access he gets a 500 internal error..failed request tracing shows the ...
2
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0answers
64 views

Samba Shares Without Using Winbind

I am curious if it is possible to use samba shares without using winbind. In our current environment we are using SSSD, Kerberos, and Samba to complete the required tasks such as joining the windows ...
0
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0answers
64 views

How to support Kerberos authentication on internal websites through Citrix Access Gateway

When I remote in through a citrix access gateway (using netscaler) I am unable to use kerberos tickets for authentication with apache. The browser only sends an NTLMSSP negotiate header and gives up. ...