samba - Oct 2016 - Naming conventions with samba4 & AD with computer with "_"

Hi,

I'm evaluating to migrate samba 3 domain to samba 4 with AD, but our
environment contains dns names with "_", and in samba wiki appears
https://support.microsoft.com/en-us/kb/909264 that you can't use dns names
with "_"

Disallowed charactersDNS host names cannot contain the following characters:

   - comma (,)
   - tilde (~)
   - colon (:)
   - exclamation point (!)
   - at sign (@)
   - number sign (#)
   - dollar sign ($)
   - percent (%)
   - caret (^)
   - ampersand (&)
   - apostrophe (')
   - period (.)
   - parentheses (())
   - braces ({})
   - *underscore (_)*
   - white space (blank)

The underscore has a special role, as it is permitted for the first
character in SRV records by RFC definition, but newer DNS servers may also
allow it anywhere in a name. For more details, see:
http://technet.microsoft.com/en-us/library/cc959336.aspx.
I have tested samba 3 to samba 4 and seems that computer objectes with
"_"
are migrated and we can add dns A with "_"


I have tried to add a cname with "_" and seems thats wokrs, but
I'm not
sure If really I can user "_" in computer names and dns names or this
requires to be replaces by "-" befores upgrade...


It is required to rename machiens with "_" and dns A and cname with
"_" to
"-", for example... ?

Thanks

Hi,

I am testing to migrate samba 3 nt domain to samba 4 ad, It is sure to keep
machines with hostname "_" and dns records a or cname with
"_"

I am reading some information, but nothing clear if we can keep this old
convention....

We have made some test and seems that any problem is generated, but we are
not sure  if we can continue with this naming convention...
thanks

2016-10-10 19:25 GMT+02:00 Trenta sis <trenta.sis at gmail.com>:
> Hi,
>
> I'm evaluating to migrate samba 3 domain to samba 4 with AD, but our
> environment contains dns names with "_", and in samba wiki
appears
> https://support.microsoft.com/en-us/kb/909264 that you can't use dns
> names with "_"
>
> Disallowed charactersDNS host names cannot contain the following
> characters:
>
>    - comma (,)
>    - tilde (~)
>    - colon (:)
>    - exclamation point (!)
>    - at sign (@)
>    - number sign (#)
>    - dollar sign ($)
>    - percent (%)
>    - caret (^)
>    - ampersand (&)
>    - apostrophe (')
>    - period (.)
>    - parentheses (())
>    - braces ({})
>    - *underscore (_)*
>    - white space (blank)
>
> The underscore has a special role, as it is permitted for the first
> character in SRV records by RFC definition, but newer DNS servers may also
> allow it anywhere in a name. For more details, see:
> http://technet.microsoft.com/en-us/library/cc959336.aspx.
> I have tested samba 3 to samba 4 and seems that computer objectes with
"_"
> are migrated and we can add dns A with "_"
>
>
> I have tried to add a cname with "_" and seems thats wokrs, but
I'm not
> sure If really I can user "_" in computer names and dns names or
this
> requires to be replaces by "-" befores upgrade...
>
>
> It is required to rename machiens with "_" and dns A and cname
with "_" to
> "-", for example... ?
>
> Thanks
>
>

On Sun, 16 Oct 2016 21:59:30 +0200
Trenta sis via samba <samba at lists.samba.org> wrote:
> Hi,
> 
> I am testing to migrate samba 3 nt domain to samba 4 ad, It is sure
> to keep machines with hostname "_" and dns records a or cname
with "_"
> 
> I am reading some information, but nothing clear if we can keep this
> old convention....
> 
> We have made some test and seems that any problem is generated, but
> we are not sure  if we can continue with this naming convention...
> thanks
> 
> 2016-10-10 19:25 GMT+02:00 Trenta sis <trenta.sis at gmail.com>:
> 
> > Hi,
> >
> > I'm evaluating to migrate samba 3 domain to samba 4 with AD, but
our
> > environment contains dns names with "_", and in samba wiki
appears
> > https://support.microsoft.com/en-us/kb/909264 that you can't use
dns
> > names with "_"
> >
> > Disallowed charactersDNS host names cannot contain the following
> > characters:
> >
> >    - comma (,)
> >    - tilde (~)
> >    - colon (:)
> >    - exclamation point (!)
> >    - at sign (@)
> >    - number sign (#)
> >    - dollar sign ($)
> >    - percent (%)
> >    - caret (^)
> >    - ampersand (&)
> >    - apostrophe (')
> >    - period (.)
> >    - parentheses (())
> >    - braces ({})
> >    - *underscore (_)*
> >    - white space (blank)
> >
> > The underscore has a special role, as it is permitted for the first
> > character in SRV records by RFC definition, but newer DNS servers
> > may also allow it anywhere in a name. For more details, see:
> > http://technet.microsoft.com/en-us/library/cc959336.aspx.
> > I have tested samba 3 to samba 4 and seems that computer objectes
> > with "_" are migrated and we can add dns A with
"_"
> >
> >
> > I have tried to add a cname with "_" and seems thats wokrs,
but I'm
> > not sure If really I can user "_" in computer names and dns
names
> > or this requires to be replaces by "-" befores upgrade...
> >
> >
> > It is required to rename machiens with "_" and dns A and
cname with
> > "_" to "-", for example... ?
> >
> > Thanks
> >
> >
If you read the documentation you posted links to, yes, you can use the
underscore character, but it is not recommended, as other dns servers
might not recognise it.

This might not be a problem now, but what if something changes in the
future ?

I would accept this and start changing things now.

Rowland

Hai, 

About the underscore ...  

Think in android phones, default names, lots have _ in the name.

And if you use Bind9 DLZ, add also : 
check-names ignore; 

I think its good to add this to the bind_dlz samba wiki.


Greetz, 

Louis



> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces at lists.samba.org] Namens Rowland Penny
via
> samba
> Verzonden: maandag 17 oktober 2016 9:39
> Aan: samba at lists.samba.org
> Onderwerp: Re: [Samba] Naming conventions with samba4 & AD with
computer
> with "_"
> 
> On Sun, 16 Oct 2016 21:59:30 +0200
> Trenta sis via samba <samba at lists.samba.org> wrote:
> 
> > Hi,
> >
> > I am testing to migrate samba 3 nt domain to samba 4 ad, It is sure
> > to keep machines with hostname "_" and dns records a or
cname with "_"
> >
> > I am reading some information, but nothing clear if we can keep this
> > old convention....
> >
> > We have made some test and seems that any problem is generated, but
> > we are not sure  if we can continue with this naming convention...
> > thanks
> >
> > 2016-10-10 19:25 GMT+02:00 Trenta sis <trenta.sis at gmail.com>:
> >
> > > Hi,
> > >
> > > I'm evaluating to migrate samba 3 domain to samba 4 with AD,
but our
> > > environment contains dns names with "_", and in samba
wiki appears
> > > https://support.microsoft.com/en-us/kb/909264 that you can't
use dns
> > > names with "_"
> > >
> > > Disallowed charactersDNS host names cannot contain the following
> > > characters:
> > >
> > >    - comma (,)
> > >    - tilde (~)
> > >    - colon (:)
> > >    - exclamation point (!)
> > >    - at sign (@)
> > >    - number sign (#)
> > >    - dollar sign ($)
> > >    - percent (%)
> > >    - caret (^)
> > >    - ampersand (&)
> > >    - apostrophe (')
> > >    - period (.)
> > >    - parentheses (())
> > >    - braces ({})
> > >    - *underscore (_)*
> > >    - white space (blank)
> > >
> > > The underscore has a special role, as it is permitted for the
first
> > > character in SRV records by RFC definition, but newer DNS servers
> > > may also allow it anywhere in a name. For more details, see:
> > > http://technet.microsoft.com/en-us/library/cc959336.aspx.
> > > I have tested samba 3 to samba 4 and seems that computer objectes
> > > with "_" are migrated and we can add dns A with
"_"
> > >
> > >
> > > I have tried to add a cname with "_" and seems thats
wokrs, but I'm
> > > not sure If really I can user "_" in computer names and
dns names
> > > or this requires to be replaces by "-" befores
upgrade...
> > >
> > >
> > > It is required to rename machiens with "_" and dns A
and cname with
> > > "_" to "-", for example... ?
> > >
> > > Thanks
> > >
> > >
> 
> If you read the documentation you posted links to, yes, you can use the
> underscore character, but it is not recommended, as other dns servers
> might not recognise it.
> 
> This might not be a problem now, but what if something changes in the
> future ?
> 
> I would accept this and start changing things now.
> 
> Rowland
> 
> --
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/options/samba

Rowland, 

 

What we also forgot to mention here.

 

FQDN names lengths are "63 bytes per label and 255 bytes for an FQDN.

 

BUT The domain controllers are limited to 155 bytes for an FQDN. 

^^^^^^^^^^^^^^^^^^^^^^

 

https://technet.microsoft.com/en-us/library/cc959336.aspx 

 

 

 

Greetz, 

 

Louis

 

 
> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces at lists.samba.org] Namens Rowland Penny
via
> samba
> Verzonden: maandag 17 oktober 2016 9:39
> Aan: samba at lists.samba.org
> Onderwerp: Re: [Samba] Naming conventions with samba4 & AD with
computer
> with "_"
> 
> On Sun, 16 Oct 2016 21:59:30 +0200
> Trenta sis via samba <samba at lists.samba.org> wrote:
> 
> > Hi,
> >
> > I am testing to migrate samba 3 nt domain to samba 4 ad, It is sure
> > to keep machines with hostname "_" and dns records a or
cname with "_"
> >
> > I am reading some information, but nothing clear if we can keep this
> > old convention....
> >
> > We have made some test and seems that any problem is generated, but
> > we are not sure  if we can continue with this naming convention...
> > thanks
> >
> > 2016-10-10 19:25 GMT+02:00 Trenta sis <trenta.sis at gmail.com>:
> >
> > > Hi,
> > >
> > > I'm evaluating to migrate samba 3 domain to samba 4 with AD,
but our
> > > environment contains dns names with "_", and in samba
wiki appears
> > > https://support.microsoft.com/en-us/kb/909264 that you can't
use dns
> > > names with "_"
> > >
> > > Disallowed charactersDNS host names cannot contain the following
> > > characters:
> > >
> > >    - comma (,)
> > >    - tilde (~)
> > >    - colon (:)
> > >    - exclamation point (!)
> > >    - at sign (@)
> > >    - number sign (#)
> > >    - dollar sign ($)
> > >    - percent (%)
> > >    - caret (^)
> > >    - ampersand (&)
> > >    - apostrophe (')
> > >    - period (.)
> > >    - parentheses (())
> > >    - braces ({})
> > >    - *underscore (_)*
> > >    - white space (blank)
> > >
> > > The underscore has a special role, as it is permitted for the
first
> > > character in SRV records by RFC definition, but newer DNS servers
> > > may also allow it anywhere in a name. For more details, see:
> > > http://technet.microsoft.com/en-us/library/cc959336.aspx.
> > > I have tested samba 3 to samba 4 and seems that computer objectes
> > > with "_" are migrated and we can add dns A with
"_"
> > >
> > >
> > > I have tried to add a cname with "_" and seems thats
wokrs, but I'm
> > > not sure If really I can user "_" in computer names and
dns names
> > > or this requires to be replaces by "-" befores
upgrade...
> > >
> > >
> > > It is required to rename machiens with "_" and dns A
and cname with
> > > "_" to "-", for example... ?
> > >
> > > Thanks
> > >
> > >
> 
> If you read the documentation you posted links to, yes, you can use the
> underscore character, but it is not recommended, as other dns servers
> might not recognise it.
> 
> This might not be a problem now, but what if something changes in the
> future ?
> 
> I would accept this and start changing things now.
> 
> Rowland
> 
> --
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/options/samba

thanks for all, tried to use with machiens and dns entry with _ and
seems to work without any special change on bind

Thanks





Rowland,



What we also forgot to mention here.



FQDN names lengths are "63 bytes per label and 255 bytes for an FQDN.



BUT The domain controllers are limited to 155 bytes for an FQDN.

^^^^^^^^^^^^^^^^^^^^^^


https://technet.microsoft.com/en-us/library/cc959336.aspx







Greetz,



Louis




>* -----Oorspronkelijk bericht-----
*
>* Van: samba [mailto:samba-bounces at lists.samba.org
<https://lists.samba.org/mailman/listinfo/samba>] Namens Rowland Penny via
*
>* samba
*
>* Verzonden: maandag 17 oktober 2016 9:39
*
>* Aan: samba at lists.samba.org
<https://lists.samba.org/mailman/listinfo/samba>
*
>* Onderwerp: Re: [Samba] Naming conventions with samba4 & AD with
computer
*
>* with "_"
*
>
>* On Sun, 16 Oct 2016 21:59:30 +0200
*
>* Trenta sis via samba <samba at lists.samba.org
<https://lists.samba.org/mailman/listinfo/samba>> wrote:
*
>
>* > Hi,
*
>* >
*
>* > I am testing to migrate samba 3 nt domain to samba 4 ad, It is sure
*
>* > to keep machines with hostname "_" and dns records a or
cname with "_"
*
>* >
*
>* > I am reading some information, but nothing clear if we can keep this
*
>* > old convention....
*
>* >
*
>* > We have made some test and seems that any problem is generated, but
*
>* > we are not sure  if we can continue with this naming convention...
*
>* > thanks
*
>* >
*
>* > 2016-10-10 19:25 GMT+02:00 Trenta sis <trenta.sis at gmail.com
<https://lists.samba.org/mailman/listinfo/samba>>:
*
>* >
*
>* > > Hi,
*
>* > >
*
>* > > I'm evaluating to migrate samba 3 domain to samba 4 with AD,
but our
*
>* > > environment contains dns names with "_", and in samba
wiki appears
*
>* > > https://support.microsoft.com/en-us/kb/909264
<https://support.microsoft.com/en-us/kb/909264> that you can't use dns
*
>* > > names with "_"
*
>* > >
*
>* > > Disallowed charactersDNS host names cannot contain the following
*
>* > > characters:
*
>* > >
*
>* > >    - comma (,)
*
>* > >    - tilde (~)
*
>* > >    - colon (:)
*
>* > >    - exclamation point (!)
*
>* > >    - at sign (@)
*
>* > >    - number sign (#)
*
>* > >    - dollar sign ($)
*
>* > >    - percent (%)
*
>* > >    - caret (^)
*
>* > >    - ampersand (&)
*
>* > >    - apostrophe (')
*
>* > >    - period (.)
*
>* > >    - parentheses (())
*
>* > >    - braces ({})
*
>* > >    - *underscore (_)*
*
>* > >    - white space (blank)
*
>* > >
*
>* > > The underscore has a special role, as it is permitted for the
first
*
>* > > character in SRV records by RFC definition, but newer DNS
servers
*
>* > > may also allow it anywhere in a name. For more details, see:
*
>* > > http://technet.microsoft.com/en-us/library/cc959336.aspx.
<http://technet.microsoft.com/en-us/library/cc959336.aspx.>
*
>* > > I have tested samba 3 to samba 4 and seems that computer
objectes
*
>* > > with "_" are migrated and we can add dns A with
"_"
*
>* > >
*
>* > >
*
>* > > I have tried to add a cname with "_" and seems thats
wokrs, but I'm
*
>* > > not sure If really I can user "_" in computer names
and dns names
*
>* > > or this requires to be replaces by "-" befores
upgrade...
*
>* > >
*
>* > >
*
>* > > It is required to rename machiens with "_" and dns A
and cname with
*
>* > > "_" to "-", for example... ?
*
>* > >
*
>* > > Thanks
*
>* > >
*
>* > >
*
>
>* If you read the documentation you posted links to, yes, you can use the
*
>* underscore character, but it is not recommended, as other dns servers
*
>* might not recognise it.
*
>
>* This might not be a problem now, but what if something changes in the
*
>* future ?
*
>
>* I would accept this and start changing things now.
*
>
>* Rowland
*
>
>* --
*
>* To unsubscribe from this list go to the following URL and read the
*
>* instructions:  https://lists.samba.org/mailman/options/samba
<https://lists.samba.org/mailman/options/samba>
*


2016-10-16 21:59 GMT+02:00 Trenta sis <trenta.sis at gmail.com>:
> Hi,
>
> I am testing to migrate samba 3 nt domain to samba 4 ad, It is sure to
> keep machines with hostname "_" and dns records a or cname with
"_"
>
> I am reading some information, but nothing clear if we can keep this old
> convention....
>
> We have made some test and seems that any problem is generated, but we are
> not sure  if we can continue with this naming convention...
> thanks
>
> 2016-10-10 19:25 GMT+02:00 Trenta sis <trenta.sis at gmail.com>:
>
>> Hi,
>>
>> I'm evaluating to migrate samba 3 domain to samba 4 with AD, but
our
>> environment contains dns names with "_", and in samba wiki
appears
>> https://support.microsoft.com/en-us/kb/909264 that you can't use
dns
>> names with "_"
>>
>> Disallowed charactersDNS host names cannot contain the following
>> characters:
>>
>>    - comma (,)
>>    - tilde (~)
>>    - colon (:)
>>    - exclamation point (!)
>>    - at sign (@)
>>    - number sign (#)
>>    - dollar sign ($)
>>    - percent (%)
>>    - caret (^)
>>    - ampersand (&)
>>    - apostrophe (')
>>    - period (.)
>>    - parentheses (())
>>    - braces ({})
>>    - *underscore (_)*
>>    - white space (blank)
>>
>> The underscore has a special role, as it is permitted for the first
>> character in SRV records by RFC definition, but newer DNS servers may
also
>> allow it anywhere in a name. For more details, see:
>> http://technet.microsoft.com/en-us/library/cc959336.aspx.
>> I have tested samba 3 to samba 4 and seems that computer objectes with
>> "_" are migrated and we can add dns A with "_"
>>
>>
>> I have tried to add a cname with "_" and seems thats wokrs,
but I'm not
>> sure If really I can user "_" in computer names and dns names
or this
>> requires to be replaces by "-" befores upgrade...
>>
>>
>> It is required to rename machiens with "_" and dns A and
cname with "_"
>> to "-", for example... ?
>>
>> Thanks
>>
>>
>
>