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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18 views

SELinux rules in CentOS 7 with Samba and SSSD on Kerberos Ticket generation

I've built a simple File Server with Samba and Netatalk running on CentOS 7.2. Everything is working as expected except for SELinux that's denying Samba to authenticate due to a policy of denying ...
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12 views

Kerberos: kprop error

I've been working on this bit for a while and it's got me stumped. I wasd trying to propagate the slave_datatrans file from a master KDC to a slave with sudo kprop -s /etc/krb5kdc/kadm5.keytab -f /...
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8 views

Need some clarification on Kerberos Constrained Delegation and SPN's

I can't seem to get a grip on what Kerberos Constrained Delegation and SPN's are... I've been reading up on IIS and these topics play a huge part when it comes to IIS. I've read about creating SPN's ...
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11 views

Apache authentication against FreeIPA's Kerberos

I'm currently trying to set up Apache as an authentication portal. It's supposed to act as a reverse proxy with krb authentication. My apache server is named portal.test.com (debian container) My IPA ...
2
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2answers
29 views

Does Active Directory send a user's access token across the network?

Question: does AD send a user's access token across the network? Research: The following two passages contradict themselves--given that TGTs are transmitted across the network by design. From the ...
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12 views

Why is my sshd looking for a wrong kvno in keytab?

My FreeBSD box is using Heimdal Kerberos-implementation. It is registered with the corporate AD, its msDS-KeyVersionNumber-attribute is set to 2, and its keytab has the following entries: FILE:/etc/...
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9 views

kerberos - active directory domain trust - SSO only working for linux machines

I have an Active Directory Server (2008r2) and a MIT Kerberos Server. Between the realms "AD.EXAMPLE.COM" and "INTERN.EXAMPLE.COM" is a two-way transitive trust, set up on the windows-side with the ...
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1answer
18 views

FreeIPA AD Trust based Integration using SunLDAP to store Policies

If we want to use the FreeIPA Active Directory Trust Integration Option, can we use an existing implementation of SunLDAP to store the Policies (e.g. sudo, hbac etc.) Essentially we don't to create ...
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2answers
33 views

Can Foreman register a new host with Active Directory?

We use Foreman and Puppet to manage our Unix systems here, but the Kerberos infrastructure is implemented over Active Directory (because Exchange). Registering the newly bootsrapped hosts with AD is ...
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0answers
19 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 ...
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14 views

Kerberized NFS mount suddenly failing, permission denied errors

I'm trying to track down a bug with an NFS mount that seems to have appeared rather suddenly. Most of the time, if I try to ls /mnt, I get output that looks like this: ls: cannot access /mnt/dir1: ...
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2answers
28 views

Can a Unix host obtain Kerberos keytabs for another host from Active Directory?

We use Puppet to configure our servers, but creating Kerberos keytabs for them is currently a manual process. We would like the Kerberos keytabs of the Unix machines to be automatically generated, ...
0
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1answer
20 views

IIS 8.5, Kerberos and DFS Backend files

We have a new IIS app (8.5 on server 2012 R2).Some of the links on the site forward to files stored on a DFS (AD Integrated) share. The setup is : IIS 8.5 --> Two DFSN servers --> File server (all ...
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1answer
25 views

Calling an URL from a Windows Server 2012 + IE 11 fails with KRB_AP_ERR_MODIFIED error

My problem : Calling an URL from a Windows Server 2012 with IE 11 fails on a IIS Application (with Windows Authentication and Kerberos activated) : After 3 captures of the correct password, I get a ...
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0answers
35 views

Linux, Kerberos Auth, and LogonWorkstations AD Attribute

When using Kerb Auth on Linux, with a Server 2008 AD Domain for authentication, and nsswitch set to files then ldap: If an ldap user tries to ssh to a server, and they are a member of a group which ...
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0answers
18 views

kinit unable to connect

I'm trying to connect to a Kerberos running on ApacheDS. Here is the initial LDIF I've loaded on LDAP: dn: ou=Users,dc=example,dc=com ou: Users description: Example.Com Users objectClass: ...
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1answer
169 views

SSH works with expired Kerberos Password

I have setup SSH - single sign on using kerberos V5. When a user password has expired , it returns 'Warning: password has expired.' and allows the user to login! I even made changes in the /etc/pam.d/...
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1answer
66 views

kadmin can't find master key

I can't use the kadmin.local interface I just get the error Authenticating as principal root/admin@deadpool.cavill.org.uk with password. kadmin.local: Can not fetch master key (error: No such file or ...
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0answers
55 views

Windows 10 Client with Centos 7 Kerberos

All, I've created an OpenLDAP + Kerberos 5 authentication setup on my small test lab. All machines are communicating and working as expected with OpenLDAP + Kerberos. Now I need to test an ...
1
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0answers
48 views

gssproxy: apache httpd as nfs-client? centos7

When Apache httpd attempts to access a user directory automounted with sec=krb5p, and presumably other sec=krb options, gssproxy issues a failure message and the web server replies with 403 Forbidden. ...
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1answer
211 views

wbinfo -u does not show AD users (is empty)

We have a problem on a Ubuntu Server 14.04 (fileserver) connected to AD on a Windows Server 2008 R2 using Samba (version 4.3.8)/WinBind and Kerberos. The problem is that users do not have writing ...
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1answer
36 views

Forward service records from main DNS to IPA server

I have a production DNS server (dns1.local) in Data Center environment, I build recently IPA server (ipa.example.com) that runs DNS as well in the same environment and it forwards requests to dns1....
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1answer
38 views

Kerberos and LDAP login

I want to manually login to a ldap-server. For authentication Kerberos is used. I am registered there with username and pw. kinit username@servername It works fine and a valid TGT is created which ...
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2answers
45 views

Initialise Kerberos ticket on ssh login using PAM

Right, so I am struggling a bit with PAM in Centos7. I have no idea how to configure it manually and make the changes permanent so that I get a kerberos ticket after a successful ssh login. The ...
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2answers
155 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....
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130 views

Questions about ktpass/kerberos with Active Directory

I got a few questions about Kerberos with Active Directory, specifically about the ktpass tool. The example AD I'm using (everything is on 2012R2 level): Active Directory Domain Name: ad.example....
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34 views

Kerberos-based SSH login requires local user account

I've recently set up a linux system (Debian-Jesse) which has joined an MS-Based Kerberos domain and been set up to allow Kerberos-based authentication for remote access. The only issue is, ...
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1answer
100 views

Samba file server as domain member: error when joining domain

I would like to set up samba 4 to share a local directory, so that domain users are allowed to mount the directory. I don't want domain users to be able to log in the linux machine, they should only ...
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0answers
12 views

What changes with Kerberos Authentication in IPv6 when using NAT? [duplicate]

How should Kerberos Authentication be setup with IPv6? Of you're using NAT for IPv6 where there is a single public IPv6 address and it translates to the machines inside in the ULA range?
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1answer
27 views

What changes with Kerberos authentication in IPv6 when everyone has a public IPv6 Address?

How should Kerberos authentication be set up with IPv6? What implications are there when client devices each use a public, globally routeable IPv6 IP address? What changes when setup this way ...
0
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2answers
71 views

Build a production IPA server without integrate DNS and NTP with client

We are going to deploy a centralized authentication Linux server (RHEL6) for our RedHat/CentOS servers in Data Center environment. I made some search I believe Free IPA is the best choice since it's ...
3
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2answers
115 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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1answer
28 views

What kind of SPN is required to delegate client credentials to a SMB Share?

I'm trying to delegate KERBEROS authentication from an SQL Server to a file server over OLEDB. Is there a particular Service Principle Name that is used to delegate credentials from an SQL Server ...
6
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1answer
313 views

Joining AD domain with Windows 10 using smart card

My Windows "domain-centric" company has abruptly decided to make the switch from Windows 7 to Windows 10, and it has become my job to make their prepared image join our domain with our smart card/...
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0answers
30 views

Unspecified GSS failure. after setting up krb5/ldap authentication

new here, so I recently setup ldap/krb5 authentication on an centos7.2 vm. Krb5/ldap is working correclty as I can login using ldap user account. However, when I check the logs in the client machine /...
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0answers
30 views

Mounting NFS v4 on Linux with Username

I'm trying to mount a NFS v4 share on a Redhat Linux machine where the share is restricted to a particular user account. I have a kerberos ticket for the server and SSSD with LDAP used to populate ...
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0answers
32 views

Kerberos authentication failure with strange account name [closed]

Recently, I observed a lot of authentication failures(about 600 failures per day) coming from one of my company servers with account name "@@CyBAAAAUBQYAMHArBwUAMGAoBQZAQGA1B...."(about 150 characters ...
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0answers
46 views

Client to IIS to SQL Server Kerberos authentication

I would like to have a setup where my IIS web server sits on a different virtual server from where my SQL Server is installed, and Windows Authentication should be used for all connections. I am ...
0
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1answer
69 views

Apache not finding the kerberos principal in keytab file

Virtual host has been configured with these options; AuthType Kerberos AuthName "Kerberos Login" KrbMethodNegotiate On KrbMethodK5Passwd Off KrbAuthRealms EXAMPLE.COM KrbAuthoritative On ...
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55 views

SSO, Kerberos, multiple domains, multiple Linux servers

I have successfully implemented SSO for one production application running on Centos 6 + apache 2.2. connecting to Windows 2008 AD server. Users are coming from 2 different domains: a.com and b.net, ...
0
votes
1answer
21 views

NFSv4 with Kerberos - idmap stops working after ~35 minutes

All machines are running CentOS 6.5. We have about 85 client machines doing a Kerberized NFSv4 mount (sec=krb5p) to a server. This weekend, the server was changed (serverA changed to serverB). ...
2
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0answers
133 views

Forward Kerberos Authentication on Ansible

I have an ansible control machine (host-A) that need to talk with host-C, an Windows machine that doesn't have local users (It's an Active Directory). host-A doesn't have network access to host-C, ...
3
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0answers
41 views

Kerberos keytab file not working

I have two AD domains and I'm trying to use NFS with Kerberos to both of them. Part of the procedure requires creating keytab files for the host and nfs principals for the client and server ...
0
votes
0answers
19 views

Why do i need freeradius's keytab?

I'm trying to set up 802.1x for the wifi. I'm working with freeradius an windows server 2012. I need SSO ... help :) Currently I'm not able to set up freeradius krb. 'radtest' doesn't make it trough. ...
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58 views

Does FTP service (IIS 7.5) on Windows 2008 R2 support kerberos authentication?

I have configured http service on IIS 7.5 for kerberos authentication. And it works fine. I have checked from linux box # klist Ticket cache: FILE:/tmp/krb5cc_0 Default principal: alex@EXAMPLE.NET ...
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1answer
25 views

Having a Kerberos issue, and can't trace the traffic in NetMon

I'm trying to get Kerberos to work for a new Sharepoint server I'm installing. It works fine for the server name, but not the FQDN. I've done setspn for both, and I've added the domain to trusted ...
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112 views

kinit pre-authentication fails

I have a centos 6.4 that someone setup a while back. The admin is not sure how he installed it, but it works very well with Kerberos. I used authconfig to set the domain and the Kerberos settings. I ...
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3answers
371 views

CentOS7 Kerberos Auth: Improper format of Kerberos configuration file;

I'm working on setting up a Squid 4.0 explicit proxy for group based AD authentication against a Active Directory domain (Server 2012 R2) with SSL bumping on a minimal CentOS 7 (64b) install. The ...
2
votes
1answer
126 views

Integrating squid with active directory

I am trying to integrate squid as a web proxy for my users in active directory. I have followed the tutorial in the squid site in here. When i run the command : msktutil -c -b "CN=Administrator" -s ...
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88 views

Cross Domain NTLM / Kerberos Auth with Chrome on Mac OS X / Linux

I'm trying to configure Chrome on my MacBook Pro to use kerberos to authenticate to web sites so I don't get prompted to enter my username and password constantly. I've added the AuthServerWhitelist ...