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mathias dufresne

2015-Dec-11 12:33 UTC

[Samba] Authentication to Secondary Domain Controller initially fails when PDC is offline

Thank you Rowland to noticed that.

Here it is:
------------------------------------------------------------------
#!/usr/bin/awk

BEGIN {
  ad_zone = "YOUR.DOMAIN.TLD"
  msdcs_zone = "_msdcs." ad_zone
  dns_server = "YOUR-DC"
}
{
  if ($0 ~ /UPDATE SECTION:/) {
    getline
    print NF, $0
    if ($4 == "A") {
      if($1 ~ /_msdcs/) {
        zone = msdcs_zone
      } else {
        zone = ad_zone
      }
      record = $1
      regexp = "." zone "."
      sub(regexp, "", record)
      cmd = "samba-tool dns add " dns_server " " msdcs_zone
" " record " A
" $5 " --kerberos=yes"
      #cmd = "samba-tool dns add " dns_server " " msdcs_zone
" " record " A
" $5 " " $2
      print cmd
      cmd | getline
      close(cmd)
    }
    if ($4 == "SRV") {
      if($1 ~ /_msdcs/) {
        zone = msdcs_zone
      } else {
        zone = ad_zone
      }
      record = $1
      regexp = "." zone "."
      sub(regexp, "", record)
      cmd = "samba-tool dns add " dns_server " " msdcs_zone
" " record "
SRV \'" $8 " " $7 " " $5 " " $6
"\' --kerberos=yes"
      #cmd = "samba-tool dns add " dns_server " " msdcs_zone
" " record "
SRV \'" $8 " " $7 " " $5 " " $6
"\' " $2
      print cmd
      cmd | getline
      close(cmd)
    }
  }
}
------------------------------------------------------------------

This script does not take in account missing NS records as samba_dnsupdate
does not try to create them.


2015-12-11 12:07 GMT+01:00 Rowland penny <rpenny at samba.org>:
> On 11/12/15 10:29, mathias dufresne wrote:
>
>> Hi Ole,
>>
>> Using internal DNS samba_dnsupdate does not work correctly, at least
not
>> every time.
>>
>> Someone modified this samba_dnsupdate tool commenting this line:
>> os.unlink(tmpfile)
>> which should line 413.
>>
>> Doing that he was able to get files generated by samba_dnsupdate to use
>> them as argument of nsupdate command (without -g switch and with
"allow
>> dns
>> updates = nonsecure" in smb.conf).
>>
>> I was not able to make that process work here but I did not tried hard.
As
>> this process was sent directly to me I share it.
>>
>> The process I use to generate all DNS records is to run samba_dnsupdate
>> --all-names --verbose and send output of that command to attached awk
>> script.
>> The awk script get information from samba_dnsupdate for each record and
>> launch samba-tool to create DNS record. This script is not clever: it
>> tries
>> to create all mentioned DNS record, generating warnings when record
>> already
>> exists.
>>
>> You will have to modify this awk script as the BEGIN section contains
fake
>> information related to AD domain:
>>
>> BEGIN {
>>    ad_zone = "YOUR.DOMAIN.TLD"
>>    msdcs_zone = "_msdcs." ad_zone
>>    dns_server = "YOUR-DC"
>> }
>>
>> You must change "YOUR.DOMAIN.TLD" and "YOUR-DC" to
match your domain
>> configuration.
>>
>> The awk script uses kerberos authentication when running samba-tool so
you
>> will need to generate a kerberos ticket for some AD admin before:
>> 1°) kinit administrator
>> 2°) samba_dnsupdate | awk -f dnsupdate.awk
>>
>> As it is not an issue to try create an entry which already exists you
can
>> run it that script on each DC to assure you all entries are correctly
>> created on all DC.
>>
>> Best regards,
>>
>> mathias dufresne
>>
>>
>>
> There is a flaw with your script!
>
>
>
>
>
> This mailing list strips off attachments, you are going to have to paste
> it into post. :-)
>
> Rowland
>
>
> --
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/options/samba
>

Ole Traupe

2015-Dec-11 13:59 UTC

head link

[Samba] Authentication to Secondary Domain Controller initially fails when PDC is offline

Hi folks,

a) thank you all for your help, I highly appreciate you time and effort, 
and I am sure I can resolve this issue very soon!
b) I have to delay this until early next week, as I have to attend to 
other matters for now.

All I can say, Louis, is that I won't set up a new DC to resolve this - 
at least not for now. This seems to be another problem of Samba4 not 
being able to deal with multiple DCs properly. And this has to be able 
to be resolved on an otherwise working domain without changing its 
architecture or other more drastic measures. This is my point of view at 
the moment. Your suggestion reminds me a bit of some typical forum 
replies to "Reinstall the OS" in case of any problems that can't
be
solved in an instant.

If necessary, I will just create the missing DNS entries of my 2nd DC by 
hand. Although I would prefer a working script supplied by a 
professional (which I am not). At least I would like to know which DNS 
entries for my 2nd DC are essential for logins to work. I wouldn't very 
much like to try this out. However, I am aware that your time is as 
limited as mine (of not even more so), and you are in no obligation in 
any way.

Besides, I didn't forget do delete anything. I used the script from the 
wiki to get rid of old records pertaining to my former 1st DC after I 
had created the records of my *new* 1st DC. I checked the results: 
everything related to my former first DC was gone. Also I 
documented/discussed this process here on the list. And nobody pointed 
me to things I forgot or was leaving out. I know that use of this script 
was totally "on my own risk". But the results were as they should have
been, at least as far I am able to tell.

That said, I will go through your responses and get back to you with 
results.

Best, have a good weekend!
Ole

Am 11.12.2015 um 13:33 schrieb mathias dufresne:> Thank you Rowland to noticed that.
>
> Here it is:
> ------------------------------------------------------------------
> #!/usr/bin/awk
>
> BEGIN {
>    ad_zone = "YOUR.DOMAIN.TLD"
>    msdcs_zone = "_msdcs." ad_zone
>    dns_server = "YOUR-DC"
> }
> {
>    if ($0 ~ /UPDATE SECTION:/) {
>      getline
>      print NF, $0
>      if ($4 == "A") {
>        if($1 ~ /_msdcs/) {
>          zone = msdcs_zone
>        } else {
>          zone = ad_zone
>        }
>        record = $1
>        regexp = "." zone "."
>        sub(regexp, "", record)
>        cmd = "samba-tool dns add " dns_server " "
msdcs_zone " " record " A
> " $5 " --kerberos=yes"
>        #cmd = "samba-tool dns add " dns_server " "
msdcs_zone " " record " A
> " $5 " " $2
>        print cmd
>        cmd | getline
>        close(cmd)
>      }
>      if ($4 == "SRV") {
>        if($1 ~ /_msdcs/) {
>          zone = msdcs_zone
>        } else {
>          zone = ad_zone
>        }
>        record = $1
>        regexp = "." zone "."
>        sub(regexp, "", record)
>        cmd = "samba-tool dns add " dns_server " "
msdcs_zone " " record "
> SRV \'" $8 " " $7 " " $5 " " $6
"\' --kerberos=yes"
>        #cmd = "samba-tool dns add " dns_server " "
msdcs_zone " " record "
> SRV \'" $8 " " $7 " " $5 " " $6
"\' " $2
>        print cmd
>        cmd | getline
>        close(cmd)
>      }
>    }
> }
> ------------------------------------------------------------------
>
> This script does not take in account missing NS records as samba_dnsupdate
> does not try to create them.
>
>
> 2015-12-11 12:07 GMT+01:00 Rowland penny <rpenny at samba.org>:
>
>> On 11/12/15 10:29, mathias dufresne wrote:
>>
>>> Hi Ole,
>>>
>>> Using internal DNS samba_dnsupdate does not work correctly, at
least not
>>> every time.
>>>
>>> Someone modified this samba_dnsupdate tool commenting this line:
>>> os.unlink(tmpfile)
>>> which should line 413.
>>>
>>> Doing that he was able to get files generated by samba_dnsupdate to
use
>>> them as argument of nsupdate command (without -g switch and with
"allow
>>> dns
>>> updates = nonsecure" in smb.conf).
>>>
>>> I was not able to make that process work here but I did not tried
hard. As
>>> this process was sent directly to me I share it.
>>>
>>> The process I use to generate all DNS records is to run
samba_dnsupdate
>>> --all-names --verbose and send output of that command to attached
awk
>>> script.
>>> The awk script get information from samba_dnsupdate for each record
and
>>> launch samba-tool to create DNS record. This script is not clever:
it
>>> tries
>>> to create all mentioned DNS record, generating warnings when record
>>> already
>>> exists.
>>>
>>> You will have to modify this awk script as the BEGIN section
contains fake
>>> information related to AD domain:
>>>
>>> BEGIN {
>>>     ad_zone = "YOUR.DOMAIN.TLD"
>>>     msdcs_zone = "_msdcs." ad_zone
>>>     dns_server = "YOUR-DC"
>>> }
>>>
>>> You must change "YOUR.DOMAIN.TLD" and "YOUR-DC"
to match your domain
>>> configuration.
>>>
>>> The awk script uses kerberos authentication when running samba-tool
so you
>>> will need to generate a kerberos ticket for some AD admin before:
>>> 1°) kinit administrator
>>> 2°) samba_dnsupdate | awk -f dnsupdate.awk
>>>
>>> As it is not an issue to try create an entry which already exists
you can
>>> run it that script on each DC to assure you all entries are
correctly
>>> created on all DC.
>>>
>>> Best regards,
>>>
>>> mathias dufresne
>>>
>>>
>>>
>> There is a flaw with your script!
>>
>>
>>
>>
>>
>> This mailing list strips off attachments, you are going to have to
paste
>> it into post. :-)
>>
>> Rowland
>>
>>
>> --
>> To unsubscribe from this list go to the following URL and read the
>> instructions:  https://lists.samba.org/mailman/options/samba
>>

Rowland penny

2015-Dec-11 14:24 UTC

head link

[Samba] Authentication to Secondary Domain Controller initially fails when PDC is offline

On 11/12/15 13:59, Ole Traupe wrote:> Hi folks,
>
> a) thank you all for your help, I highly appreciate you time and 
> effort, and I am sure I can resolve this issue very soon!
> b) I have to delay this until early next week, as I have to attend to 
> other matters for now.
>
> All I can say, Louis, is that I won't set up a new DC to resolve this 
> - at least not for now. This seems to be another problem of Samba4 not 
> being able to deal with multiple DCs properly. And this has to be able 
> to be resolved on an otherwise working domain without changing its 
> architecture or other more drastic measures. This is my point of view 
> at the moment. Your suggestion reminds me a bit of some typical forum 
> replies to "Reinstall the OS" in case of any problems that
can't be
> solved in an instant.
>
> If necessary, I will just create the missing DNS entries of my 2nd DC 
> by hand. Although I would prefer a working script supplied by a 
> professional (which I am not). At least I would like to know which DNS 
> entries for my 2nd DC are essential for logins to work. I wouldn't 
> very much like to try this out. However, I am aware that your time is 
> as limited as mine (of not even more so), and you are in no obligation 
> in any way.
>
> Besides, I didn't forget do delete anything. I used the script from 
> the wiki to get rid of old records pertaining to my former 1st DC 
> after I had created the records of my *new* 1st DC. I checked the 
> results: everything related to my former first DC was gone. Also I 
> documented/discussed this process here on the list. And nobody pointed 
> me to things I forgot or was leaving out. I know that use of this 
> script was totally "on my own risk". But the results were as they
> should have been, at least as far I am able to tell.
>
> That said, I will go through your responses and get back to you with 
> results.
>
> Best, have a good weekend!
> Ole
>
>
Ole, when you provision a domain, all the required records are created, 
but when you join another DC, most of the dns records are not created 
until the samba deamon is started and samba_dnsupdate is run 
automatically, see 'dns_update_list' for what is added (this is in 
/usr/share/samba/setup & /var/lib/samba/private on debian)

If you want to add the missing NS records, add these lines to 
'dns_update_list' :

   # RW DNS servers
${IF_RWDNS_DOMAIN}A 
${DNSDOMAIN}                                          $IP
${IF_RWDNS_DOMAIN}NS 
${DNSDOMAIN}                                          ${HOSTNAME}

# RW DNS servers
${IF_RWDNS_FOREST}NS 
_msdcs.${DNSFOREST}                                   ${HOSTNAME}

You should be aware that even if you add these lines, they will not do 
you any good at the moment if you use the internal dns server.

There is a problem, it looks like the records do not get added when 
samba_dnsupdate is first run, but they are.

What you could do is this, copy the 'dns_update_list', replace all the 
variables with your info (${DNSDOMAIN} etc), then use this to check what 
you are missing and then add what isn't there.

Rowland

L.P.H. van Belle

2015-Dec-11 14:31 UTC

head link

[Samba] Authentication to Secondary Domain Controller initially fails when PDC is offline

Commented inbetween. 
> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces at lists.samba.org] Namens Ole Traupe
> Verzonden: vrijdag 11 december 2015 14:59
> Aan: samba at lists.samba.org
> Onderwerp: Re: [Samba] Authentication to Secondary Domain Controller
> initially fails when PDC is offline
> 
> Hi folks,
> 
> a) thank you all for your help, I highly appreciate you time and effort,
> and I am sure I can resolve this issue very soon!
> b) I have to delay this until early next week, as I have to attend to
> other matters for now.
> 
> All I can say, Louis, is that I won't set up a new DC to resolve this -
> at least not for now. This seems to be another problem of Samba4 not
> being able to deal with multiple DCs properly. And this has to be able
> to be resolved on an otherwise working domain without changing its
> architecture or other more drastic measures. This is my point of view at
> the moment. Your suggestion reminds me a bit of some typical forum
> replies to "Reinstall the OS" in case of any problems that
can't be
> solved in an instant.[L.P.H. van Belle] 
I dont think this is another problem of samba4, but this is a problem which
started in the begining of your install, at least thats what i suppect based on
all your info on the list.
I suspect that, then you "installed" the new DC with the old name/ip. 
You forgot somewhere to remove old entries in AD and/or DNS.
And this is why i suggested it, normaly i dont suggest something like this, but
i do think that if you setup clean you wil have a better running server with
less problems , but what you choose is all up to you.
Do what you thinks is best for you.
> 
> If necessary, I will just create the missing DNS entries of my 2nd DC by
> hand. Although I would prefer a working script supplied by a
> professional (which I am not). At least I would like to know which DNS
> entries for my 2nd DC are essential for logins to work. I wouldn't very
> much like to try this out. However, I am aware that your time is as
> limited as mine (of not even more so), and you are in no obligation in
> any way.[L.P.H. van Belle] 
>). At least I would like to know which DNS
> entries for my 2nd DC are essential for logins to work.And what you ask here is already answered few times imo. 

Again, your quicker with a clean install, and you learn more from it. 
And with clean, i dont mean dropping your AD, just add new "DC Join"
to hold the AD data so you can remove the faulty server and then you can install
that server again, but now as it should.
AND when you join a DC your login problem is fixed also.  ;-) 

> Besides, I didn't forget do delete anything. I used the script from the
> wiki to get rid of old records pertaining to my former 1st DC after I
> had created the records of my *new* 1st DC. I checked the results:
> everything related to my former first DC was gone. Also I
> documented/discussed this process here on the list. And nobody pointed
> me to things I forgot or was leaving out. I know that use of this script
> was totally "on my own risk". But the results were as they should
have
> been, at least as far I am able to tell.[L.P.H. van Belle] 
[L.P.H. van Belle] which script ? can anyone point that one for me, cant find
it. I only know about
https://bugzilla.samba.org/show_bug.cgi?id=10595 
> 
> That said, I will go through your responses and get back to you with
> results.
> 
> Best, have a good weekend!
> Ole[L.P.H. van Belle] 
Thank you, and have a very good weekend also, i hope your problem is fixed soon.
> 
> 
> Am 11.12.2015 um 13:33 schrieb mathias dufresne:
> > Thank you Rowland to noticed that.
> >
> > Here it is:
> > ------------------------------------------------------------------
> > #!/usr/bin/awk
> >
> > BEGIN {
> >    ad_zone = "YOUR.DOMAIN.TLD"
> >    msdcs_zone = "_msdcs." ad_zone
> >    dns_server = "YOUR-DC"
> > }
> > {
> >    if ($0 ~ /UPDATE SECTION:/) {
> >      getline
> >      print NF, $0
> >      if ($4 == "A") {
> >        if($1 ~ /_msdcs/) {
> >          zone = msdcs_zone
> >        } else {
> >          zone = ad_zone
> >        }
> >        record = $1
> >        regexp = "." zone "."
> >        sub(regexp, "", record)
> >        cmd = "samba-tool dns add " dns_server " "
msdcs_zone " " record
> " A
> > " $5 " --kerberos=yes"
> >        #cmd = "samba-tool dns add " dns_server " "
msdcs_zone " " record
> " A
> > " $5 " " $2
> >        print cmd
> >        cmd | getline
> >        close(cmd)
> >      }
> >      if ($4 == "SRV") {
> >        if($1 ~ /_msdcs/) {
> >          zone = msdcs_zone
> >        } else {
> >          zone = ad_zone
> >        }
> >        record = $1
> >        regexp = "." zone "."
> >        sub(regexp, "", record)
> >        cmd = "samba-tool dns add " dns_server " "
msdcs_zone " " record
> "
> > SRV \'" $8 " " $7 " " $5 " " $6
"\' --kerberos=yes"
> >        #cmd = "samba-tool dns add " dns_server " "
msdcs_zone " " record
> "
> > SRV \'" $8 " " $7 " " $5 " " $6
"\' " $2
> >        print cmd
> >        cmd | getline
> >        close(cmd)
> >      }
> >    }
> > }
> > ------------------------------------------------------------------
> >
> > This script does not take in account missing NS records as
> samba_dnsupdate
> > does not try to create them.
> >
> >
> > 2015-12-11 12:07 GMT+01:00 Rowland penny <rpenny at samba.org>:
> >
> >> On 11/12/15 10:29, mathias dufresne wrote:
> >>
> >>> Hi Ole,
> >>>
> >>> Using internal DNS samba_dnsupdate does not work correctly, at
least
> not
> >>> every time.
> >>>
> >>> Someone modified this samba_dnsupdate tool commenting this
line:
> >>> os.unlink(tmpfile)
> >>> which should line 413.
> >>>
> >>> Doing that he was able to get files generated by
samba_dnsupdate to
> use
> >>> them as argument of nsupdate command (without -g switch and
with
> "allow
> >>> dns
> >>> updates = nonsecure" in smb.conf).
> >>>
> >>> I was not able to make that process work here but I did not
tried
> hard. As
> >>> this process was sent directly to me I share it.
> >>>
> >>> The process I use to generate all DNS records is to run
> samba_dnsupdate
> >>> --all-names --verbose and send output of that command to
attached awk
> >>> script.
> >>> The awk script get information from samba_dnsupdate for each
record
> and
> >>> launch samba-tool to create DNS record. This script is not
clever: it
> >>> tries
> >>> to create all mentioned DNS record, generating warnings when
record
> >>> already
> >>> exists.
> >>>
> >>> You will have to modify this awk script as the BEGIN section
contains
> fake
> >>> information related to AD domain:
> >>>
> >>> BEGIN {
> >>>     ad_zone = "YOUR.DOMAIN.TLD"
> >>>     msdcs_zone = "_msdcs." ad_zone
> >>>     dns_server = "YOUR-DC"
> >>> }
> >>>
> >>> You must change "YOUR.DOMAIN.TLD" and
"YOUR-DC" to match your domain
> >>> configuration.
> >>>
> >>> The awk script uses kerberos authentication when running
samba-tool so
> you
> >>> will need to generate a kerberos ticket for some AD admin
before:
> >>> 1°) kinit administrator
> >>> 2°) samba_dnsupdate | awk -f dnsupdate.awk
> >>>
> >>> As it is not an issue to try create an entry which already
exists you
> can
> >>> run it that script on each DC to assure you all entries are
correctly
> >>> created on all DC.
> >>>
> >>> Best regards,
> >>>
> >>> mathias dufresne
> >>>
> >>>
> >>>
> >> There is a flaw with your script!
> >>
> >>
> >>
> >>
> >>
> >> This mailing list strips off attachments, you are going to have to
> paste
> >> it into post. :-)
> >>
> >> Rowland
> >>
> >>
> >> --
> >> To unsubscribe from this list go to the following URL and read the
> >> instructions:  https://lists.samba.org/mailman/options/samba
> >>
> 
> 
> --
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/options/samba

Ole Traupe

2015-Dec-17 12:50 UTC

head link

[Samba] Authentication to Secondary Domain Controller initially fails when PDC is offline

Am 11.12.2015 um 15:31 schrieb L.P.H. van Belle:> Commented inbetween.
>
>> -----Oorspronkelijk bericht-----
>> Van: samba [mailto:samba-bounces at lists.samba.org] Namens Ole Traupe
>> Verzonden: vrijdag 11 december 2015 14:59
>> Aan: samba at lists.samba.org
>> Onderwerp: Re: [Samba] Authentication to Secondary Domain Controller
>> initially fails when PDC is offline
>>
>> Hi folks,
>>
>> a) thank you all for your help, I highly appreciate you time and
effort,
>> and I am sure I can resolve this issue very soon!
>> b) I have to delay this until early next week, as I have to attend to
>> other matters for now.
>>
>> All I can say, Louis, is that I won't set up a new DC to resolve
this -
>> at least not for now. This seems to be another problem of Samba4 not
>> being able to deal with multiple DCs properly. And this has to be able
>> to be resolved on an otherwise working domain without changing its
>> architecture or other more drastic measures. This is my point of view
at
>> the moment. Your suggestion reminds me a bit of some typical forum
>> replies to "Reinstall the OS" in case of any problems that
can't be
>> solved in an instant.
> [L.P.H. van Belle]
> I dont think this is another problem of samba4, but this is a problem which
started in the begining of your install, at least thats what i suppect based on
all your info on the list.
> I suspect that, then you "installed" the new DC with the old
name/ip.
Yes, maybe, but why/how?
> You forgot somewhere to remove old entries in AD and/or DNS.
Not that I know of. This is pure speculation. My domain is not that 
large and I can go through all DNS records in 5 min. There wasn't 
anything left pointing to the demoted DC.
> And this is why i suggested it, normaly i dont suggest something like this,
but i do think that if you setup clean you wil have a better running server with
less problems , but what you choose is all up to you.
> Do what you thinks is best for you.
I am still considering this as a last resort.
>
>> If necessary, I will just create the missing DNS entries of my 2nd DC
by
>> hand. Although I would prefer a working script supplied by a
>> professional (which I am not). At least I would like to know which DNS
>> entries for my 2nd DC are essential for logins to work. I wouldn't
very
>> much like to try this out. However, I am aware that your time is as
>> limited as mine (of not even more so), and you are in no obligation in
>> any way.
> [L.P.H. van Belle]
>
>> ). At least I would like to know which DNS
>> entries for my 2nd DC are essential for logins to work.
> And what you ask here is already answered few times imo.
Where? Point me to it, please!
>
> Again, your quicker with a clean install, and you learn more from it.
> And with clean, i dont mean dropping your AD, just add new "DC
Join" to hold the AD data so you can remove the faulty server and then you
can install that server again, but now as it should.
> AND when you join a DC your login problem is fixed also.  ;-)
I somehow doubt that. Still it seems that no one here has an idea of why 
log-on from member servers isn't working properly (for me). However, in 
the meantime I have created all the necessary DNS records. This can't be 
the issue anymore.
>
>
>> Besides, I didn't forget do delete anything. I used the script from
the
>> wiki to get rid of old records pertaining to my former 1st DC after I
>> had created the records of my *new* 1st DC. I checked the results:
>> everything related to my former first DC was gone. Also I
>> documented/discussed this process here on the list. And nobody pointed
>> me to things I forgot or was leaving out. I know that use of this
script
>> was totally "on my own risk". But the results were as they
should have
>> been, at least as far I am able to tell.[L.P.H. van Belle]
> [L.P.H. van Belle] which script ? can anyone point that one for me, cant
find it. I only know about
> https://bugzilla.samba.org/show_bug.cgi?id=10595
It is this one:
https://gallery.technet.microsoft.com/scriptcenter/d31f091f-2642-4ede-9f97-0e1cc4d577f3#content
>
>> That said, I will go through your responses and get back to you with
>> results.
>>
>> Best, have a good weekend!
>> Ole
> [L.P.H. van Belle]
> Thank you, and have a very good weekend also, i hope your problem is fixed
soon.
Thanks, me too.

Ole
>
>>
>> Am 11.12.2015 um 13:33 schrieb mathias dufresne:
>>> Thank you Rowland to noticed that.
>>>
>>> Here it is:
>>> ------------------------------------------------------------------
>>> #!/usr/bin/awk
>>>
>>> BEGIN {
>>>     ad_zone = "YOUR.DOMAIN.TLD"
>>>     msdcs_zone = "_msdcs." ad_zone
>>>     dns_server = "YOUR-DC"
>>> }
>>> {
>>>     if ($0 ~ /UPDATE SECTION:/) {
>>>       getline
>>>       print NF, $0
>>>       if ($4 == "A") {
>>>         if($1 ~ /_msdcs/) {
>>>           zone = msdcs_zone
>>>         } else {
>>>           zone = ad_zone
>>>         }
>>>         record = $1
>>>         regexp = "." zone "."
>>>         sub(regexp, "", record)
>>>         cmd = "samba-tool dns add " dns_server "
" msdcs_zone " " record
>> " A
>>> " $5 " --kerberos=yes"
>>>         #cmd = "samba-tool dns add " dns_server "
" msdcs_zone " " record
>> " A
>>> " $5 " " $2
>>>         print cmd
>>>         cmd | getline
>>>         close(cmd)
>>>       }
>>>       if ($4 == "SRV") {
>>>         if($1 ~ /_msdcs/) {
>>>           zone = msdcs_zone
>>>         } else {
>>>           zone = ad_zone
>>>         }
>>>         record = $1
>>>         regexp = "." zone "."
>>>         sub(regexp, "", record)
>>>         cmd = "samba-tool dns add " dns_server "
" msdcs_zone " " record
>> "
>>> SRV \'" $8 " " $7 " " $5 " "
$6 "\' --kerberos=yes"
>>>         #cmd = "samba-tool dns add " dns_server "
" msdcs_zone " " record
>> "
>>> SRV \'" $8 " " $7 " " $5 " "
$6 "\' " $2
>>>         print cmd
>>>         cmd | getline
>>>         close(cmd)
>>>       }
>>>     }
>>> }
>>> ------------------------------------------------------------------
>>>
>>> This script does not take in account missing NS records as
>> samba_dnsupdate
>>> does not try to create them.
>>>
>>>
>>> 2015-12-11 12:07 GMT+01:00 Rowland penny <rpenny at
samba.org>:
>>>
>>>> On 11/12/15 10:29, mathias dufresne wrote:
>>>>
>>>>> Hi Ole,
>>>>>
>>>>> Using internal DNS samba_dnsupdate does not work correctly,
at least
>> not
>>>>> every time.
>>>>>
>>>>> Someone modified this samba_dnsupdate tool commenting this
line:
>>>>> os.unlink(tmpfile)
>>>>> which should line 413.
>>>>>
>>>>> Doing that he was able to get files generated by
samba_dnsupdate to
>> use
>>>>> them as argument of nsupdate command (without -g switch and
with
>> "allow
>>>>> dns
>>>>> updates = nonsecure" in smb.conf).
>>>>>
>>>>> I was not able to make that process work here but I did not
tried
>> hard. As
>>>>> this process was sent directly to me I share it.
>>>>>
>>>>> The process I use to generate all DNS records is to run
>> samba_dnsupdate
>>>>> --all-names --verbose and send output of that command to
attached awk
>>>>> script.
>>>>> The awk script get information from samba_dnsupdate for
each record
>> and
>>>>> launch samba-tool to create DNS record. This script is not
clever: it
>>>>> tries
>>>>> to create all mentioned DNS record, generating warnings
when record
>>>>> already
>>>>> exists.
>>>>>
>>>>> You will have to modify this awk script as the BEGIN
section contains
>> fake
>>>>> information related to AD domain:
>>>>>
>>>>> BEGIN {
>>>>>      ad_zone = "YOUR.DOMAIN.TLD"
>>>>>      msdcs_zone = "_msdcs." ad_zone
>>>>>      dns_server = "YOUR-DC"
>>>>> }
>>>>>
>>>>> You must change "YOUR.DOMAIN.TLD" and
"YOUR-DC" to match your domain
>>>>> configuration.
>>>>>
>>>>> The awk script uses kerberos authentication when running
samba-tool so
>> you
>>>>> will need to generate a kerberos ticket for some AD admin
before:
>>>>> 1°) kinit administrator
>>>>> 2°) samba_dnsupdate | awk -f dnsupdate.awk
>>>>>
>>>>> As it is not an issue to try create an entry which already
exists you
>> can
>>>>> run it that script on each DC to assure you all entries are
correctly
>>>>> created on all DC.
>>>>>
>>>>> Best regards,
>>>>>
>>>>> mathias dufresne
>>>>>
>>>>>
>>>>>
>>>> There is a flaw with your script!
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> This mailing list strips off attachments, you are going to have
to
>> paste
>>>> it into post. :-)
>>>>
>>>> Rowland
>>>>
>>>>
>>>> --
>>>> To unsubscribe from this list go to the following URL and read
the
>>>> instructions:  https://lists.samba.org/mailman/options/samba
>>>>
>>
>> --
>> To unsubscribe from this list go to the following URL and read the
>> instructions:  https://lists.samba.org/mailman/options/samba
>
>

L.P.H. van Belle

2015-Dec-17 13:22 UTC

head link

[Samba] Authentication to Secondary Domain Controller initially fails when PDC is offline

Commented inbetween.
> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces at lists.samba.org] Namens Ole Traupe
> Verzonden: donderdag 17 december 2015 13:51
> Aan: samba at lists.samba.org
> Onderwerp: Re: [Samba] Authentication to Secondary Domain Controller
> initially fails when PDC is offline
> 
> 
> 
> Am 11.12.2015 um 15:31 schrieb L.P.H. van Belle:
> > Commented inbetween.
> >
> >> -----Oorspronkelijk bericht-----
> >> Van: samba [mailto:samba-bounces at lists.samba.org] Namens Ole
Traupe
> >> Verzonden: vrijdag 11 december 2015 14:59
> >> Aan: samba at lists.samba.org
> >> Onderwerp: Re: [Samba] Authentication to Secondary Domain
Controller
> >> initially fails when PDC is offline
> >>
> >> Hi folks,
> >>
> >> a) thank you all for your help, I highly appreciate you time and
> effort,
> >> and I am sure I can resolve this issue very soon!
> >> b) I have to delay this until early next week, as I have to attend
to
> >> other matters for now.
> >>
> >> All I can say, Louis, is that I won't set up a new DC to
resolve this -
> >> at least not for now. This seems to be another problem of Samba4
not
> >> being able to deal with multiple DCs properly. And this has to be
able
> >> to be resolved on an otherwise working domain without changing its
> >> architecture or other more drastic measures. This is my point of
view
> at
> >> the moment. Your suggestion reminds me a bit of some typical forum
> >> replies to "Reinstall the OS" in case of any problems
that can't be
> >> solved in an instant.
> > [L.P.H. van Belle]
> > I dont think this is another problem of samba4, but this is a problem
> which started in the begining of your install, at least thats what i
> suppect based on all your info on the list.
> > I suspect that, then you "installed" the new DC with the old
name/ip.
> 
> Yes, maybe, but why/how?[L.P.H. van Belle]  I could answere that i would, but i dont know how you
exactly installed. I'v scripted my installs, so it always the same.
I have no problems with my config, or on all my servers. 
So one fix fixes all in my case. 

> 
> > You forgot somewhere to remove old entries in AD and/or DNS.
> 
> Not that I know of. This is pure speculation. My domain is not that
> large and I can go through all DNS records in 5 min. There wasn't
> anything left pointing to the demoted DC.
> 
> > And this is why i suggested it, normaly i dont suggest something like
> this, but i do think that if you setup clean you wil have a better running
> server with less problems , but what you choose is all up to you.
> > Do what you thinks is best for you.
> 
> I am still considering this as a last resort.[L.P.H. van Belle] from a learning point this is always good. 
fist installs are always hard, i've tested my setup/configs for about 6-8
month before production, and i screwed also things up, so i reinstalled and
learned also the hard way.
And thankfully there is the samba list, which helped me a lot. 
> 
> >
> >> If necessary, I will just create the missing DNS entries of my 2nd
DC
> by
> >> hand. Although I would prefer a working script supplied by a
> >> professional (which I am not). At least I would like to know which
DNS
> >> entries for my 2nd DC are essential for logins to work. I
wouldn't very
> >> much like to try this out. However, I am aware that your time is
as
> >> limited as mine (of not even more so), and you are in no
obligation in
> >> any way.
> > [L.P.H. van Belle]
> >
> >> ). At least I would like to know which DNS
> >> entries for my 2nd DC are essential for logins to work.
> > And what you ask here is already answered few times imo.
> 
> Where? Point me to it, please! 
Uhh, somehere in the emails of 10-dec, see whats in the 
samba_dnsupdate --verbose that are the needed dns records. 


[L.P.H. van Belle]  in the AD and dns, open the user managment tool ( the AD
user manager )
klik on view, enable advanced..  
now klik through the complete ad and find old entries. 
Dont forget the "computers" OU 


and do the same in the DNS manager. 
also, make sure you DNS zone (SOA) record contains the PRIMARY DC. 

Above can be done also with ldapsearch. 

> 
> >
> > Again, your quicker with a clean install, and you learn more from it.
> > And with clean, i dont mean dropping your AD, just add new "DC
Join" to
> hold the AD data so you can remove the faulty server and then you can
> install that server again, but now as it should.
> > AND when you join a DC your login problem is fixed also.  ;-)
> 
> I somehow doubt that. Still it seems that no one here has an idea of why
> log-on from member servers isn't working properly (for me). However, in
> the meantime I have created all the necessary DNS records. This can't
be
> the issue anymore.
[L.P.H. van Belle] 
a delay for the login when one dns is done is normal, it needs to timeout first.
when you type : 
dig a internal.domain.tld 
you should see 2 responses, and the results are your 2 DC's. 

> 
> >
> >
> >> Besides, I didn't forget do delete anything. I used the script
from the
> >> wiki to get rid of old records pertaining to my former 1st DC
after I
> >> had created the records of my *new* 1st DC. I checked the results:
> >> everything related to my former first DC was gone. Also I
> >> documented/discussed this process here on the list. And nobody
pointed
> >> me to things I forgot or was leaving out. I know that use of this
> script
> >> was totally "on my own risk". But the results were as
they should have
> >> been, at least as far I am able to tell.[L.P.H. van Belle]
> > [L.P.H. van Belle] which script ? can anyone point that one for me,
cant
> find it. I only know about
> > https://bugzilla.samba.org/show_bug.cgi?id=10595
> 
> It is this one:
> https://gallery.technet.microsoft.com/scriptcenter/d31f091f-2642-4ede-
> 9f97-0e1cc4d577f3#content
> 
> >
> >> That said, I will go through your responses and get back to you
with
> >> results.
> >>
> >> Best, have a good weekend!
> >> Ole
> > [L.P.H. van Belle]
> > Thank you, and have a very good weekend also, i hope your problem is
> fixed soon.
> 
> Thanks, me too.
> 
> Ole
> 
> >
> >>
> >> Am 11.12.2015 um 13:33 schrieb mathias dufresne:
> >>> Thank you Rowland to noticed that.
> >>>
> >>> Here it is:
> >>>
------------------------------------------------------------------
> >>> #!/usr/bin/awk
> >>>
> >>> BEGIN {
> >>>     ad_zone = "YOUR.DOMAIN.TLD"
> >>>     msdcs_zone = "_msdcs." ad_zone
> >>>     dns_server = "YOUR-DC"
> >>> }
> >>> {
> >>>     if ($0 ~ /UPDATE SECTION:/) {
> >>>       getline
> >>>       print NF, $0
> >>>       if ($4 == "A") {
> >>>         if($1 ~ /_msdcs/) {
> >>>           zone = msdcs_zone
> >>>         } else {
> >>>           zone = ad_zone
> >>>         }
> >>>         record = $1
> >>>         regexp = "." zone "."
> >>>         sub(regexp, "", record)
> >>>         cmd = "samba-tool dns add " dns_server
" " msdcs_zone " "
> record
> >> " A
> >>> " $5 " --kerberos=yes"
> >>>         #cmd = "samba-tool dns add " dns_server
" " msdcs_zone " "
> record
> >> " A
> >>> " $5 " " $2
> >>>         print cmd
> >>>         cmd | getline
> >>>         close(cmd)
> >>>       }
> >>>       if ($4 == "SRV") {
> >>>         if($1 ~ /_msdcs/) {
> >>>           zone = msdcs_zone
> >>>         } else {
> >>>           zone = ad_zone
> >>>         }
> >>>         record = $1
> >>>         regexp = "." zone "."
> >>>         sub(regexp, "", record)
> >>>         cmd = "samba-tool dns add " dns_server
" " msdcs_zone " "
> record
> >> "
> >>> SRV \'" $8 " " $7 " " $5 "
" $6 "\' --kerberos=yes"
> >>>         #cmd = "samba-tool dns add " dns_server
" " msdcs_zone " "
> record
> >> "
> >>> SRV \'" $8 " " $7 " " $5 "
" $6 "\' " $2
> >>>         print cmd
> >>>         cmd | getline
> >>>         close(cmd)
> >>>       }
> >>>     }
> >>> }
> >>>
------------------------------------------------------------------
> >>>
> >>> This script does not take in account missing NS records as
> >> samba_dnsupdate
> >>> does not try to create them.
> >>>
> >>>
> >>> 2015-12-11 12:07 GMT+01:00 Rowland penny <rpenny at
samba.org>:
> >>>
> >>>> On 11/12/15 10:29, mathias dufresne wrote:
> >>>>
> >>>>> Hi Ole,
> >>>>>
> >>>>> Using internal DNS samba_dnsupdate does not work
correctly, at least
> >> not
> >>>>> every time.
> >>>>>
> >>>>> Someone modified this samba_dnsupdate tool commenting
this line:
> >>>>> os.unlink(tmpfile)
> >>>>> which should line 413.
> >>>>>
> >>>>> Doing that he was able to get files generated by
samba_dnsupdate to
> >> use
> >>>>> them as argument of nsupdate command (without -g
switch and with
> >> "allow
> >>>>> dns
> >>>>> updates = nonsecure" in smb.conf).
> >>>>>
> >>>>> I was not able to make that process work here but I
did not tried
> >> hard. As
> >>>>> this process was sent directly to me I share it.
> >>>>>
> >>>>> The process I use to generate all DNS records is to
run
> >> samba_dnsupdate
> >>>>> --all-names --verbose and send output of that command
to attached
> awk
> >>>>> script.
> >>>>> The awk script get information from samba_dnsupdate
for each record
> >> and
> >>>>> launch samba-tool to create DNS record. This script is
not clever:
> it
> >>>>> tries
> >>>>> to create all mentioned DNS record, generating
warnings when record
> >>>>> already
> >>>>> exists.
> >>>>>
> >>>>> You will have to modify this awk script as the BEGIN
section
> contains
> >> fake
> >>>>> information related to AD domain:
> >>>>>
> >>>>> BEGIN {
> >>>>>      ad_zone = "YOUR.DOMAIN.TLD"
> >>>>>      msdcs_zone = "_msdcs." ad_zone
> >>>>>      dns_server = "YOUR-DC"
> >>>>> }
> >>>>>
> >>>>> You must change "YOUR.DOMAIN.TLD" and
"YOUR-DC" to match your domain
> >>>>> configuration.
> >>>>>
> >>>>> The awk script uses kerberos authentication when
running samba-tool
> so
> >> you
> >>>>> will need to generate a kerberos ticket for some AD
admin before:
> >>>>> 1°) kinit administrator
> >>>>> 2°) samba_dnsupdate | awk -f dnsupdate.awk
> >>>>>
> >>>>> As it is not an issue to try create an entry which
already exists
> you
> >> can
> >>>>> run it that script on each DC to assure you all
entries are
> correctly
> >>>>> created on all DC.
> >>>>>
> >>>>> Best regards,
> >>>>>
> >>>>> mathias dufresne
> >>>>>
> >>>>>
> >>>>>
> >>>> There is a flaw with your script!
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> This mailing list strips off attachments, you are going to
have to
> >> paste
> >>>> it into post. :-)
> >>>>
> >>>> Rowland
> >>>>
> >>>>
> >>>> --
> >>>> To unsubscribe from this list go to the following URL and
read the
> >>>> instructions: 
https://lists.samba.org/mailman/options/samba
> >>>>
> >>
> >> --
> >> To unsubscribe from this list go to the following URL and read the
> >> instructions:  https://lists.samba.org/mailman/options/samba
> >
> >
> 
> 
> --
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/options/samba

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