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 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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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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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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238 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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293 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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41 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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34 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 ...
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17 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 ...
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85 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 ...
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407 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 ...
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1k 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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55 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 ...
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200 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 ...
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179 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 ...
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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 ...
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1answer
3k 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 ...
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2k 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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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 ...
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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 ...
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387 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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92 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 ...
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133 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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570 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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202 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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127 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 ...
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108 views

Can I use user-based kerberos authenication with NFSv4?

Is it possible to set NFSv4 + Kerberos to do user-based authentication? As far as I understand you are required to create a principal for a client machine(i.e. it is still Host-based?) on Kerberos ...
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pwauth kerberos authentication specifying default and secondary servers

I am currently using Kerberos authentication for Basic Authentication on Apache using pwauth and mod_auth_external. I would like to add multiple servers to authenticate from, however they would have ...
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1answer
7k views

Apache kerberos authentication to Active Directory not happening. (Is KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN related?)

My goal is to have Apache authenticate authenticate against AD, without prompting for a username and password, using Kerberos. It currently always shows "401 Unauthorized", and appears to be not ...
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331 views

GSSAPITrustDns option missing from OpenSSH-6.7

I need to use the GSSAPITrustDns option to connect to a round robin service using Kerberos authentication. This works correctly using OpenSSH 5.3 and 6.6.1p1 on a selection of machines. I have an Arch ...
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1answer
682 views

libnss-ldap getent passwd - AD replies correctly but output shows local /etc/passwd

I am trying to configure libnss-ldap to provide AD authentication to my Linux Debian servers. This is working fine if user exists locally, I want to make it work for Domain users. Here is my ...
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76 views

Apache auth_kerb_module on Windows

I need to install the Kerberos module in Apache on Windows. I have copied the file auth_kerb_mod.so to apache/modules/ and I have modified the conf/httpd.conf with LoadModule auth_kerb_module ...
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How do I re-enable Kerberos authentication after upgrading to Mac OS X 10.10 Yosemite?

In previous versions of Mac OS X, one could enable Kerberos authentication when a user logs in by following a support document. Specifically, this document explains that the file ...
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729 views

Joining a NetApp to a domain on a Read Only Domain Controller

I have an isolated network, into which I've built a vfiler. The point of this network is that it's a non routed 'test' network. However, there's a need for LDAP/Kerberos and CIFS access to the ...
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589 views

Postfix + Saslauthd + Kerberos 5 + CentOS 7 not working

I've almost got saslauthd checking against Kerberos but seeing some last issues on CentOS 7. When postfix talks to saslauthd, it sends a lowercased domain and it's not corrected. I tried to fix things ...
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1answer
650 views

Kerberos-PAM authentication failure: pam or pre-authentication

kinit -p 'username' works -- no problem with the setup of the Kerberos realm. I can't get the login from the GUI to work, however. Client auth.log: pam_krb5(gdm3:auth): user <username> ...
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373 views

Lightweight webserver with SSPI authentification [closed]

I'm looking for a fast, lightweight web server (for example nginx or lighttpd) which supports authentication to a Microsoft Kerberos authentication server (SSPI). This webserver must run under Windows ...
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20 views

Enabling constrained delegation on DC computer account

Is it necessary to have constrained delegation enabled on Microsoft AD domain controller computer account? If yes then why and what are consequences of disabling it? I'm mainly interested in current ...
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176 views

Samba4 Workgroup showing in My computer Properties

I suppose my question is stupid but want to clear it. Installed Samba4, joined machine but in My Computer properties the WORKGROUP is shown in lowercase letters. Whats is the reason to don't show in ...
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Kerberos Configuration Manager for SQL Server error “unable to access user principal information from the system”

When I launch the Kerberos Configuration Manager for SQL Server and try to connect to the local machine it's on, I am getting the error "Kerberos Configuration Manager for SQL Server error "unable to ...
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1answer
117 views

389 Directory Server - Multiple Domains

I have multiple business that i would like to authenticate to a single server for SSO. I am using 389 directory server and have already split each domain into it's own respective OU. I would like to ...
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1answer
472 views

Kerberos token size error

I am having issues with a .net 2.0 web app hosted on a windows 2003 server authenticating with a java app (on linux I think). The java server is expecting Kerberos authentication and currently fails ...
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72 views

kerberos apache 401 error for domain admins using office addin

I use SSO for access to a Linux based system from our windows 7 PC's. This works for IE using the logon credentials to access the system. However, when the developed office plugin is used by any ...
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403 views

Cannot enable GSS-TSIG updates from Active Directory in BIND 9.10

I’m with a problem trying to enable GSS-TSIG with BIND 9.10. Before I start describing what I’ve done, I would like to say that I’ve already done this in in another domain without any problems. So I ...
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1k views

MacOS X 10.9 Mavericks Kerberos login w/ FreeIPA

Has anyone successfully set up authentication and authorization between MacOS X and FreeIPA? An old revision of the FreeIPA documentation explains how to get it working in 10.4 and nothing in their ...
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120 views

Avoid client keytab with Kerberized NFSv4

I would like to setup a Kerberized NFSv4 server such that clients do not need a keytab to mount a volume (but such that users get their privileges according to their Kerberos ticket as usual). Is it ...
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612 views

Apache - Replace Apache::AuthenNTLM with Kerberos (mod_auth_kerb)

Within an intranet system on Solaris we currently use perls Apache2::AuthenNTLM module to authenticate with a Win 2k3 doman server, so we can access the user ID of the person browsing the site. ...
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63 views

Kerberos in production on virtual machines

At the moment I am investigating the possibility to use Kerberos as the primary authentication protocol for our cloud structure. We'll probably follow through with this idea and for the sake of HA the ...
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1answer
162 views

FreeIPA krb5.conf has example.com entries

I have installed and reinstalled FreeIPA ipa-server-3.0.0-37.el6.x86_64 on a fully updated OEL 6.5 server a couple (3) times now and even if I destroy the existing /etc/krb5.conf file and reinstall ...
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2answers
4k views

Can't add my Red Hat 7 machine to our company's Active Directory

I'm trying to join my RHEL 7 VM machine to our company's AD. I can validate my login credentials just fine with kinit (No return if I enter the correct password, error if I enter the wrong one), ...
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1answer
2k views

problems creating a keytab file on win server

I am trying to create a keytab file. i see a warning WARNING: pType and account type do not match. This might cause problems. The command i use is ktpass -princ ...