[Samba] Fwd: Dynamic DNS Updates not working. samba_dnsupdate : (sambalist: message 3 of 20) RuntimeError: (sambalist: to exclusive) kinit for [DC at Realm] failed (Cannot contact any KDC for requested realm)
Timo Altun
olol13.samba at the-1337.org
Fri Mar 20 03:02:35 MDT 2015
Thank you Louis for that answer! Actually I did get kinit and
samba_dnsupdate working, though I am unsure how. I tried some changes to
krb5.conf in the [realms] and [domain_realm] sections, als well as
setting dns_lookup_realm = false to true, but reverted it all back to the
initial file:
[libdefaults]
default_realm = INTRANET.MAYWEG.NET
dns_lookup_realm = false
dns_lookup_kdc = true
After a reboot, both kinit and samba_dnsupdate worked on the host machine.
Shares can be accessed, RSAT tools are working. From the linux fileserver
nslookup and ping work for hostnames of domainmembers, dig command does not
get an answer. The windows machines can nslookup and ping everything but
the linux machine. Somehow it did not generate an entry in the DNS Server.
Is this normal behavior for linux domain members and I need to create the
DNS entry manually or is something still amiss?
Greetings and thanks for the help so far,
Timo
On 20 March 2015 at 08:42, L.P.H. van Belle <belle at bazuin.nl> wrote:
> Try change your resolv.conf from :
> >nameserver 127.0.0.1
> >domain intranet.mayweg.net
>
> to
> nameserver 192.168.11.250
> search intranet.mayweg.net
>
> >The only thing I was unsure about, was which hostname to enter
> >for Kerberos
> >Server and Kerberos admin server when asked during the
> >installation of the
> >packages..
>
> Try these defealt settings for kerberos..
> You didnt have to enter the hostname, Only the default kerberos Domain
> name is needed.
>
> a copy past for you.
>
> echo "krb5-config krb5-config/add_servers_realm string
> INTRANET.MAYWEG.NET" | debconf-set-selections
> echo "krb5-config krb5-config/read_conf boolean true" |
> debconf-set-selections
> echo "krb5-config krb5-config/kerberos_servers string " |
> debconf-set-selections
> echo "krb5-config krb5-config/default_realm string
> INTRANET.MAYWEG.NET" | debconf-set-selections
> echo "krb5-config krb5-config/add_servers boolean false" |
> debconf-set-selections
> echo "krb5-config krb5-config/admin_server string " |
> debconf-set-selections
> echo "krb5-config krb5-config/dns_for_default boolean true" |
> debconf-set-selections
> dpkg-reconfigure plow krb5-config
>
> and if you want to point to a kerberos server.
> echo "krb5-config krb5-config/kerberos_servers string
> server06.intranet.mayweg.net" | debconf-set-selections
>
> but its not needed, man krb5.conf tells you enough.
>
> after the changes, type:
> host -t SRV _kerberos._udp.intranet.mayweg.net
> if you get not found, then we need to analize more.
>
>
>
> If you want to start with a "Clean server"
> just have a look here.
>
> https://secure.bazuin.nl/scripts/
>
> I added 2 simple scripts. a debian wheezy backported and debian jessie
> script.
> The Jessie script is basicly the wheezy backported version, but without
> the backports repo.
> Its a set with minimal changes to the system, and use the defaults there
> where possible.
>
> If you look in the script,
> these settings MUST be set.
> Settings you must change are :
>
> NTPD_SERVER1_EXTERNAL
> NTPD_RESTRICT_INTERFACE ( if you dont have a eth0 )
> BIND9_NETWORKS
> SAMBA_DC1_IP
> SAMBA_NT_DOMAIN
> SAMBA_SITE_NAME
>
> optional:
> SAMBA_PASS_POLICY_CHANGE
> SAMBA_TEMPLATE_HOMEDIR
> SAMBA_TEMPLATE_SHELL
>
>
> and as last :
> CONFIGURED
>
> All other options are optional.
> If you have a different dns domain name and kerberos domain.
> you must change that.. etc..
>
> Greetz,
>
> Louis
>
>
>
> >-----Oorspronkelijk bericht-----
> >Van: olol13.samba at the-1337.org
> >[mailto:samba-bounces at lists.samba.org] Namens Timo Altun
> >Verzonden: vrijdag 20 maart 2015 0:04
> >Aan: Peter Serbe; samba at lists.samba.org; Rowland Penny -
> >repenny241155 at gmail.com
> >Onderwerp: Re: [Samba] Fwd: Dynamic DNS Updates not working.
> >samba_dnsupdate : (sambalist: message 3 of 20) RuntimeError:
> >(sambalist: to exclusive) kinit for [DC at Realm] failed (Cannot
> >contact any KDC for requested realm)
> >
> >Ok, I setup a new machine with Debian Jessie and checked and installed
> >everything from OS requirements in the wiki (
> >https://wiki.samba.org/index.php/OS_Requirements ).
> >The only thing I was unsure about, was which hostname to enter
> >for Kerberos
> >Server and Kerberos admin server when asked during the
> >installation of the
> >packages...I used krb.intranet.mayweg.net.
> >Now, after the classicupgrade kinit isn't working anymore...I
> >get the same
> >error I get when trying samba_dnsupdate:
> >kinit: Cannot contact any KDC for realm 'INTRANET.MAYWEG.NET'
> >while getting
> >initial credentials.
> >
> >One step I did not do as stated in the wiki is configuring bind with
> >--with-gssapi=/usr/include/gssapi
> >--with-dlopen=yes.
> >Once again the dlopen driver seems to work in this version,
> >but I have no
> >idea about the first part. Should I build bind myself with the
> >first option?
> >@Rowland, did you have a working bind installation before you
> >upgraded/provisioned your domain?
> >
> >@Peter There is no file called namedb in /etc/bind, but the
> >whole folder is
> >writeable for user bind.
> >
> >My configs, now mostly adapted from Rowland's woking configuration are:
> >
> >/etc/network/interfaces:
> >auto lo
> >iface lo inet loopback
> >
> >auto eth0
> >iface eth0 inet static
> > address 192.168.11.250
> > network 192.168.11.0
> > netmask 255.255.255.0
> > broadcast 192.168.11.255
> >
> >/etc/hosts:
> >127.0.0.1 localhost
> >192.168.11.250 server06.intranet.mayweg.net server06 krb
> >
> ># The following lines are desirable for IPv6 capable hosts
> >::1 localhost ip6-localhost ip6-loopback
> >ff02::1 ip6-allnodes
> >ff02::2 ip6-allrouters
> >
> >/etc/resolv.conf:
> >nameserver 127.0.0.1
> >domain intranet.mayweg.net
> >
> >/etc/bind/named.conf:
> >include "/etc/bind/named.conf.options";
> >include "/etc/bind/named.conf.local";
> >include "/etc/bind/named.conf.default-zones";
> >include "/var/lib/samba/private/named.conf";
> >
> >/etc/bin/named.conf.options:
> >options {
> >directory "/var/cache/bind";
> >dnssec-validation no;
> >auth-nxdomain no; # conform to RFC1035
> >listen-on-v6 { any; };
> >tkey-gssapi-keytab "/var/lib/samba/private/dns.keytab";
> >};
> >
> >/var/lib/samba/private/named.conf:
> > database "dlopen
> >/usr/lib/x86_64-linux-gnu/samba/bind9/dlz_bind9_9.so";
> >
> >/etc/krb5.conf:
> >[libdefaults]
> >default_realm = INTRANET.MAYWEG.NET
> >dns_lookup_realm = false
> >dns_lookup_kdc = true
> >
> >/etc/samba/smb.conf:
> ># Global parameters
> >[global]
> >workgroup = MAYWEG.NET
> >realm = INTRANET.MAYWEG.NET
> >netbios name = SERVER06
> >interfaces = lo, eth0
> >bind interfaces only = Yes
> >server role = active directory domain controller
> >server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc,
> >drepl, winbind,
> >ntp_signd, kcc, dnsupdate
> >idmap_ldb:use rfc2307 = yes
> >
> >[netlogon]
> >path = /var/lib/samba/sysvol/intranet.mayweg.net/scripts
> >read only = No
> >
> >[sysvol]
> >path = /var/lib/samba/sysvol
> >read only = No
> >
> >
> >On 19 March 2015 at 15:31, Peter Serbe <peter at serbe.ch> wrote:
> >
> >>
> >>
> >> Timo Altun schrieb am 19.03.2015 10:30:
> >>
> >> > As I wrote in my first mail, Kerberos does work. I can successfully
> >> request
> >> > and list a ticket on the AC DC.
> >>
> >> OK, then next things, which come to my mind are:
> >> is the keytab, you set in named.conf.options readable
> >> for the user, under which bind is run.
> >>
> >> Then, is the /etc/bind/namedb writable for bind.
> >>
> >> And in the end, it might be a screwed up installation.
> >> I had troubles with dynamic updates a long time ago,
> >> when it turned out, that I screwed something up during
> >> the installation.
> >>
> >> HTH
> >> - Peter
> >>
> >>
> >--
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> >
> >
>
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