Yesterday I configured an Active Directory Server using Arch Linux and Samba 4 following this guide.

I even added a client to the domain and was able to log in successfuly on my client. After a restart it no longer works, I can't use Microsoft RSAT anymore and I tracked down this problem to the kinit administrator@INTERNAL.CORE.COM instruction which returns:

Cannot contact any KDC for realm 'INTERNAL.CORP.COM' while getting initial credentials

Trying to solve my problem I tried googling around and found this:

kinit(v5): Cannot contact any KDC for requested realm while getting initial credentials

The application cannot find the kerberos server. Check firewall, DNS and /etc/hosts.

But, as pointed by the Arch Linux Tutorial posted adobe I tried some commands to test connection:

# host -t SRV _ldap._tcp.internal.corp.com.
# host -t SRV _kerberos._udp.internal.corp.com.
# host -t A core.internal.corp.com.  #core is my server hostname

Which returned:

_ldap._tcp.internal.corp.com has SRV record 0 100 389 core.internal.corp.com.
_kerberos._udp.internal.corp.com has SRV record 0 100 88 core.internal.corp.com.
core.internal.corp.com has address

As you can see on my second command it seems that I actually can reach the kerberos service.

Here are some of my config files:

/etc/krb5.conf (copied from /var/lib/samba/private/krb5.conf as pointed on the tutorial )

    default_realm = INTERNAL.CORP.COM
    dns_lookup_realm = false
    dns_lookup_kdc = true


# Generated by resolvconf
search internal.corp

My server hostname is CORE. My NetBIOS Domain is CORP. My DNS Domain is internal.corp.com

I'm out of ideas, any help would be appreciated.


Searching a little bit more I found a solution to my problem. As posted here, all I needed to do was changing my samba configuration:

/etc/samba/smb.conf Where I added this line into the [global] section.

server services = rpc, nbt, wrepl, ldap, cldap, kdc, drepl, winbind, ntp_signd, kcc, dnsupdate, dns, s3fs

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