[Samba] Fixing dns_tkey_gssnegotiate: TKEY is unacceptable but stuck on check_spn_alias_collision
L. van Belle
belle at samba.org
Tue Aug 9 07:01:47 UTC 2022
Good Morning,
Remove these flat file zone configs, these are in de AD-DC DNS setup also.
> zone "." IN {
> zone "localhost" IN {
> zone "0.0.127.in-addr.arpa" IN {
Enable-ing forwarders are not obligated, if not setup the root servers in de
AD-DC DNS will be used.
But back to your problem..
stop samba winbind on this DC.
use samba tool to remove the DC
use samba tool remove dead server to clean more *( on DC1).
Use any DNS manager/command to remove any A or PTR record of DC2 in the DNS
on DC1
Remove left overs in the "Sites in AD" *( on DC1).
Cleanup all folders of samba.
check it again, now only when you 100% sure its gone.
rejoin. *(with IP DC1 first in resolv.conf)
reboot *( with IP DC1 first in resolv.conf)
check everything...
now, fix resolv, *( IP DC2 first in resolv.conf, then DC1 ip.)
Reboot *( or.. use..
samba_upgradedns --dns-backend=BIND9_DLZ && samba_upgradedns
--dns-backend=SAMBA_INTERNAL && samba_upgradedns --dns-backend=BIND9_DLZ
That's what I would do, but its key everything is gone of the old server in
the DNS on DC1.
Seen this before and in general it took me more time to fix it then a
re-join.
Hope that it helps,
greetz,
Louis
> -----Oorspronkelijk bericht-----
> Van: samba <samba-bounces at lists.samba.org> Namens Rowland Penny via
> samba
> Verzonden: maandag 8 augustus 2022 18:03
> Aan: samba at lists.samba.org
> CC: Rowland Penny <rpenny at samba.org>
> Onderwerp: Re: [Samba] Fixing dns_tkey_gssnegotiate: TKEY is unacceptable
> but stuck on check_spn_alias_collision
>
> On Mon, 2022-08-08 at 08:40 -0700, Matthew Schumacher via samba wrote:
> > On 8/8/22 5:00 AM, L. van Belle via samba wrote:
> > > Can you run this script..
> > > https://raw.githubusercontent.com/thctlo/samba4/master/samba-
> collect
> > > -debug-info.sh
> > > and post the content.
> > > Thanks,
> > >
> > > Greetz,
> > >
> > > Louis
> > >
> > >
> > Hi Louis,
> >
> > I can't post the output of that script due to it showing a lot of
> > internal information, but I can say :
>
> Did you miss this:
>
> Please check this and if required, sanitise it.
>
> >
> > --------------------------------------------------------------------
> > Hostname, dns, realm, etc is all fine.
> >
> > There are only two interfaces lo0, eth0 and are configured correctly.
> >
> > /etc/hosts has loopback and the IP address followed by short name and
> > FQDN for this host
> >
> > */etc/resolve.conf is 127.0.0.1 and then the other DNS servers* *(*I
> > think this is the problem*)*
>
> You should be using the DC's ipaddress as the nameserver.
>
> >
> > Kerberos SRV _kerberos._tcp.ad.domain.net record(s) verified ok
> >
> > 'kinit Administrator' checked successfully.
> >
> > Samba is running as an AD DC
> >
> > /etc/krb5.conf is a COPY of /var/lib/samba/private/krb5.conf and looks
> > fine
> >
> > /etc/nsswitch.conf shows "files ldap" since I use nss-pam-ldap on this
> > host to resolve UID and GUI in AD
> >
> > /etc/samba/smb.conf shows
> >
> > [global]
> > netbios name = dc-2
> > realm = AD.DOMAIN.NET
> > server role = active directory domain controller
> > server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc, drepl,
> > winbindd, ntp_signd, kcc, dnsupdate
> > workgroup = AD
> > idmap_ldb:userfc2307 = yes
> > tls enabled = yes
> > tls keyfile = /etc/ssl/certs/dc-2.pem
> > tls certfile = /etc/ssl/certs/dc-2.pem
> > tls cafile = /etc/ssl/certs/dc-2.pem
> > ntlm auth = mschapv2-and-ntlmv2-only
> >
> > [sysvol]
> > path = /var/lib/samba/sysvol
> > read only = No
> >
> > [netlogon]
> > path = /var/lib/samba/sysvol/ad.domain.net/scripts
> > read only = No
> >
> > This DC is not being used as a fileserver
> >
> > Detected bind DLZ enabled..
> >
> > Time verified ok, within the allowed 300sec margin.
> > Time offset is currently : -1 seconds
> >
> > Packages are missing because I don't have dpkg. Distro is slackware,
> > I compiled samba myself.
>
> You could use winbind instead of ldap, but you would probably need to
> create the required links.
>
> > --------------------------------------------------------------------
> >
> > Given the above, let me include my /etc/named.conf
> >
> > --------------------------------------------------------------------
> > options {
> > directory "/var/named";
> > /*
> > * If there is a firewall between you and nameservers you want
> > * to talk to, you might need to uncomment the query-source
> > * directive below. Previous versions of BIND always asked
> > * questions using port 53, but BIND 8.1 uses an unprivileged
> > * port by default.
> > */
> > // query-source address * port 53;
> >
> > tkey-gssapi-keytab "/var/lib/samba/bind-dns/dns.keytab";
> > minimal-responses yes;
> >
> > // forwarders {
> > // x.x.x.x;
> > // };
>
> You need to set the 'forwarders'
>
> >
> > };
> >
> > //
> > // a caching only nameserver config
> > //
> > zone "." IN {
> > type hint;
> > file "caching-example/named.root"; };
> >
> > zone "localhost" IN {
> > type master;
> > file "caching-example/localhost.zone";
> > allow-update { none; };
> > };
> >
> > zone "0.0.127.in-addr.arpa" IN {
> > type master;
> > file "caching-example/named.local";
> > allow-update { none; };
> > };
> >
> > include "/var/lib/samba/bind-dns/named.conf";
> > --------------------------------------------------------------------
> >
> >
> > Looking at the DNS servers in /etc/resolve.conf it occurred to me that
> > using the loopback address wouldn't work, so I removed that, and it
> > updated the dns against another domain controller without issue.
> >
> > So, my question. Is there any reason the local bind server with the
> > DLZ plugin can't take kerberos authenticated updates? Any thoughts on
> > how to debug this?
>
> Are you sure it isn't working now that you have fixed /etc/resolv.conf ?
>
> >
> > Also, samba_dnsupdate --use-samba-tool works just fine, so, can I
> > configure samba to use that internally when calling samba-dnsupdate
> > with?
> >
> > dns update command = /usr/sbin/samba_dnsupdate --use-samba-tool
> >
> > Any disadvantages of doing it that way?
>
> None what so ever.
>
> Rowland
>
>
>
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