Discussion:
A And Cname-record
(too old to reply)
Ejaz Ahmed
2020-06-17 21:44:04 UTC
Permalink
when i am trying to add A and CNAME record together for the same
subdomain, getting an error as below, you all kind assistance would be
highly appreciated thanks in advance

my records are as follows in zone

auotdiscover IN A 1.1.1.1
autodiscover IN CNAME autodiscover.acig.com.sa

======================================================

dns_master_load: acig.com.sa.hosts:102: autodiscover.a
<http://autodiscover.acig.com.sa/>cig.com.sa: CNAME and other data

zone acig.com.sa/IN: loading from master file acig.com.sa.hosts failed:
CNAME and other data
zone acig.com.sa/IN: not loaded due to errors
============================================
Jukka Pakkanen
2020-06-17 21:50:49 UTC
Permalink
Check at least the spelling


LÀhettÀjÀ: bind-users <bind-users-***@lists.isc.org> Puolesta Ejaz Ahmed
LÀhetetty: 17. kesÀkuuta 2020 23:44
Vastaanottaja: bind-***@lists.isc.org
Aihe: A And Cname-record

when i am trying to add A and CNAME record together for the same subdomain, getting an error as below, you all kind assistance would be highly appreciated thanks in advance

my records are as follows in zone

auotdiscover IN A 1.1.1.1
autodiscover IN CNAME autodiscover.acig.com.sa<http://autodiscover.acig.com.sa>

======================================================
dns_master_load: acig.com.sa.hosts:102: autodiscover.a<http://autodiscover.acig.com.sa/>cig.com.sa<http://cig.com.sa>: CNAME and other data
zone acig.com.sa/IN<http://acig.com.sa/IN>: loading from master file acig.com.sa.hosts failed: CNAME and other data
zone acig.com.sa/IN<http://acig.com.sa/IN>: not loaded due to errors
============================================
Warren Kumari
2020-06-17 21:52:38 UTC
Permalink
Yup - that’s because you cannot (legally) have a CNAME and any other RR
type at the same name — see
https://en.m.wikipedia.org/wiki/CNAME_record for an explanation as to why...

W
Post by Ejaz Ahmed
when i am trying to add A and CNAME record together for the same
subdomain, getting an error as below, you all kind assistance would be
highly appreciated thanks in advance
my records are as follows in zone
auotdiscover IN A 1.1.1.1
autodiscover IN CNAME autodiscover.acig.com.sa
======================================================
dns_master_load: acig.com.sa.hosts:102: autodiscover.a
<http://autodiscover.acig.com.sa/>cig.com.sa: CNAME and other data
CNAME and other data
zone acig.com.sa/IN: not loaded due to errors
============================================
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I don't think the execution is relevant when it was obviously a bad idea in
the first place.
This is like putting rabid weasels in your pants, and later expressing
regret at having chosen those particular rabid weasels and that pair of
pants.
---maf
Jukka Pakkanen
2020-06-17 21:53:32 UTC
Permalink
Including the trailing dots


LÀhettÀjÀ: bind-users <bind-users-***@lists.isc.org> Puolesta Jukka Pakkanen
LÀhetetty: 17. kesÀkuuta 2020 23:51
Vastaanottaja: Ejaz Ahmed <***@cyberia.net.sa>; bind-***@lists.isc.org
Aihe: VS: A And Cname-record

Check at least the spelling


LÀhettÀjÀ: bind-users <bind-users-***@lists.isc.org<mailto:bind-users-***@lists.isc.org>> Puolesta Ejaz Ahmed
LÀhetetty: 17. kesÀkuuta 2020 23:44
Vastaanottaja: bind-***@lists.isc.org<mailto:bind-***@lists.isc.org>
Aihe: A And Cname-record

when i am trying to add A and CNAME record together for the same subdomain, getting an error as below, you all kind assistance would be highly appreciated thanks in advance

my records are as follows in zone

auotdiscover IN A 1.1.1.1
autodiscover IN CNAME autodiscover.acig.com.sa<http://autodiscover.acig.com.sa>

======================================================
dns_master_load: acig.com.sa.hosts:102: autodiscover.a<http://autodiscover.acig.com.sa/>cig.com.sa<http://cig.com.sa>: CNAME and other data
zone acig.com.sa/IN<http://acig.com.sa/IN>: loading from master file acig.com.sa.hosts failed: CNAME and other data
zone acig.com.sa/IN<http://acig.com.sa/IN>: not loaded due to errors
============================================
Bogdan-Stefan Rotariu
2020-06-17 21:56:19 UTC
Permalink
Hi,
Post by Jukka Pakkanen
when i am trying to add A and CNAME record together for the same subdomain, getting an error as below, you all kind assistance would be highly appreciated thanks in advance
my records are as follows in zone
auotdiscover IN A 1.1.1.1
autodiscover IN CNAME autodiscover.acig.com.sa <http://autodiscover.acig.com.sa/>
======================================================
dns_master_load: acig.com.sa.hosts:102: autodiscover.a <http://autodiscover.acig.com.sa/>cig.com.sa <http://cig.com.sa/>: CNAME and other data
zone acig.com.sa/IN <http://acig.com.sa/IN>: loading from master file acig.com.sa.hosts failed: CNAME and other data
zone acig.com.sa/IN <http://acig.com.sa/IN>: not loaded due to errors
CNAME records cannot coexist with any other records last time I’ve checked. See section 2.4 from RFC1912[1]

[1] https://tools.ietf.org/html/rfc1912 <https://tools.ietf.org/html/rfc1912>

—
Bogdan-Stefan Rotariu
Mark Andrews
2020-06-17 22:26:33 UTC
Permalink
Hi,
Post by Jukka Pakkanen
when i am trying to add A and CNAME record together for the same subdomain, getting an error as below, you all kind assistance would be highly appreciated thanks in advance
my records are as follows in zone
auotdiscover IN A 1.1.1.1
autodiscover IN CNAME autodiscover.acig.com.sa
======================================================
dns_master_load: acig.com.sa.hosts:102: autodiscover.acig.com.sa: CNAME and other data
zone acig.com.sa/IN: loading from master file acig.com.sa.hosts failed: CNAME and other data
zone acig.com.sa/IN: not loaded due to errors
CNAME records cannot coexist with any other records last time I’ve checked. See section 2.4 from RFC1912[1]
[1] https://tools.ietf.org/html/rfc1912
Well it actually goes back to RFC 1034. Unfortunately it wasn’t enforced in
nameservers at the beginning and is still not enforced by some servers.

3.6.2. Aliases and canonical names

...

The domain system provides such a feature using the canonical name
(CNAME) RR. A CNAME RR identifies its owner name as an alias, and
specifies the corresponding canonical name in the RDATA section of the
RR. If a CNAME RR is present at a node, no other data should be
present; this ensures that the data for a canonical name and its aliases
cannot be different. This rule also insures that a cached CNAME can be
used without checking with an authoritative server for other RR types.

Mark
—
Bogdan-Stefan Rotariu
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Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: ***@isc.org
Jukka Pakkanen
2020-06-17 22:31:47 UTC
Permalink
Yes but before going to RFC details one should check the basic spelling and syntax first...

-----Alkuperäinen viesti-----
Lähettäjä: bind-users <bind-users-***@lists.isc.org> Puolesta Mark Andrews
Lähetetty: 18. kesäkuuta 2020 0:27
Vastaanottaja: Bogdan-Stefan Rotariu <***@rotariu.ro>
Kopio: bind-***@lists.isc.org
Aihe: Re: A And Cname-record
Hi,
Post by Ejaz Ahmed
when i am trying to add A and CNAME record together for the same
subdomain, getting an error as below, you all kind assistance would
be highly appreciated thanks in advance
my records are as follows in zone
auotdiscover IN A 1.1.1.1
autodiscover IN CNAME autodiscover.acig.com.sa
======================================================
CNAME and other data
zone acig.com.sa/IN: loading from master file acig.com.sa.hosts
failed: CNAME and other data
zone acig.com.sa/IN: not loaded due to errors
CNAME records cannot coexist with any other records last time I’ve
checked. See section 2.4 from RFC1912[1]
[1] https://tools.ietf.org/html/rfc1912
Well it actually goes back to RFC 1034. Unfortunately it wasn’t enforced in nameservers at the beginning and is still not enforced by some servers.

3.6.2. Aliases and canonical names

...

The domain system provides such a feature using the canonical name
(CNAME) RR. A CNAME RR identifies its owner name as an alias, and specifies the corresponding canonical name in the RDATA section of the RR. If a CNAME RR is present at a node, no other data should be present; this ensures that the data for a canonical name and its aliases cannot be different. This rule also insures that a cached CNAME can be used without checking with an authoritative server for other RR types.

Mark
—
Bogdan-Stefan Rotariu
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--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: ***@isc.org

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Mark Andrews
2020-06-17 23:30:56 UTC
Permalink
Yes but before going to RFC details one should check the basic spelling and syntax first…
I put the auotdiscover/autodiscover difference down to typo when entering the records by
hand into the email message. Similarly absolute vs relative target name.

The fact that there was a error message that was cut-and-pasted indicates that the zone
actually does have CNAME and other data for name autodiscover.acig.com.sa and that Ejaz
said he was adding a A and CNAME at the same subdomain is enough by itself to discuss
that issue.

Mark
-----Alkuperäinen viesti-----
Lähetetty: 18. kesäkuuta 2020 0:27
Aihe: Re: A And Cname-record
Hi,
Post by Ejaz Ahmed
when i am trying to add A and CNAME record together for the same
subdomain, getting an error as below, you all kind assistance would
be highly appreciated thanks in advance
my records are as follows in zone
auotdiscover IN A 1.1.1.1
autodiscover IN CNAME autodiscover.acig.com.sa
======================================================
CNAME and other data
zone acig.com.sa/IN: loading from master file acig.com.sa.hosts
failed: CNAME and other data
zone acig.com.sa/IN: not loaded due to errors
CNAME records cannot coexist with any other records last time I’ve
checked. See section 2.4 from RFC1912[1]
[1] https://tools.ietf.org/html/rfc1912
Well it actually goes back to RFC 1034. Unfortunately it wasn’t enforced in nameservers at the beginning and is still not enforced by some servers.
3.6.2. Aliases and canonical names
...
The domain system provides such a feature using the canonical name
(CNAME) RR. A CNAME RR identifies its owner name as an alias, and specifies the corresponding canonical name in the RDATA section of the RR. If a CNAME RR is present at a node, no other data should be present; this ensures that the data for a canonical name and its aliases cannot be different. This rule also insures that a cached CNAME can be used without checking with an authoritative server for other RR types.
Mark
—
Bogdan-Stefan Rotariu
_______________________________________________
Please visit https://lists.isc.org/mailman/listinfo/bind-users to
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Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
_______________________________________________
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Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: ***@isc.org
Matus UHLAR - fantomas
2020-06-18 11:36:17 UTC
Permalink
Post by Jukka Pakkanen
Yes but before going to RFC details one should check the basic spelling and syntax first...
if there was a spelling mistake, the error would not be "CNAME and other data"
when the error is "CNAME and other data", spelling mistakes don't matter...
Post by Jukka Pakkanen
Hi,
Post by Ejaz Ahmed
when i am trying to add A and CNAME record together for the same
subdomain, getting an error as below, you all kind assistance would
be highly appreciated thanks in advance
my records are as follows in zone
auotdiscover IN A 1.1.1.1
autodiscover IN CNAME autodiscover.acig.com.sa
======================================================
CNAME and other data
zone acig.com.sa/IN: loading from master file acig.com.sa.hosts
failed: CNAME and other data
zone acig.com.sa/IN: not loaded due to errors
CNAME records cannot coexist with any other records last time I’ve
checked. See section 2.4 from RFC1912[1]
[1] https://tools.ietf.org/html/rfc1912
Well it actually goes back to RFC 1034. Unfortunately it wasn’t enforced in nameservers at the beginning and is still not enforced by some servers.
3.6.2. Aliases and canonical names
...
The domain system provides such a feature using the canonical name
(CNAME) RR. A CNAME RR identifies its owner name as an alias, and specifies the corresponding canonical name in the RDATA section of the RR. If a CNAME RR is present at a node, no other data should be present; this ensures that the data for a canonical name and its aliases cannot be different. This rule also insures that a cached CNAME can be used without checking with an authoritative server for other RR types.
--
Matus UHLAR - fantomas, ***@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Fighting for peace is like fucking for virginity...
Ondřej Surý
2020-06-18 11:41:02 UTC
Permalink
Jukka and others,

I would prefer if we didn’t scold people for typos on the mailing list. The typo
in the message had no impact on the question itself, and here, we are trying
to build community that’s welcoming to newcomers to the wonderful world
of DNS.

Ondrej
--
Ondřej SurÃœ
Post by Jukka Pakkanen
Yes but before going to RFC details one should check the basic spelling and syntax first...
-----AlkuperÀinen viesti-----
LÀhetetty: 18. kesÀkuuta 2020 0:27
Aihe: Re: A And Cname-record
Post by Bogdan-Stefan Rotariu
Hi,
Post by Ejaz Ahmed
when i am trying to add A and CNAME record together for the same
subdomain, getting an error as below, you all kind assistance would
be highly appreciated thanks in advance
my records are as follows in zone
auotdiscover IN A 1.1.1.1
autodiscover IN CNAME autodiscover.acig.com.sa
======================================================
CNAME and other data
zone acig.com.sa/IN: loading from master file acig.com.sa.hosts
failed: CNAME and other data
zone acig.com.sa/IN: not loaded due to errors
CNAME records cannot coexist with any other records last time I’ve
checked. See section 2.4 from RFC1912[1]
[1] https://tools.ietf.org/html/rfc1912
Well it actually goes back to RFC 1034. Unfortunately it wasn’t enforced in nameservers at the beginning and is still not enforced by some servers.
3.6.2. Aliases and canonical names
...
The domain system provides such a feature using the canonical name
(CNAME) RR. A CNAME RR identifies its owner name as an alias, and specifies the corresponding canonical name in the RDATA section of the RR. If a CNAME RR is present at a node, no other data should be present; this ensures that the data for a canonical name and its aliases cannot be different. This rule also insures that a cached CNAME can be used without checking with an authoritative server for other RR types.
Mark
Post by Bogdan-Stefan Rotariu
—
Bogdan-Stefan Rotariu
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Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
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Bob McDonald
2020-06-18 13:42:26 UTC
Permalink
May I suggest the following?:

If you are an individual that is so pedantic that seeing a spelling error
causes you to lose sleep or have other soul searing consternation, send an
email (gently worded) to the poster only. Please also be encouraging to
that individual pointing out that these types of errors happen and will not
cause loss of their immortal soul. As Ondrej points out, we are trying to
build community that's welcoming to newcomers to the wonderful world of DNS.

I remember when I first subscribed to this list being terrified of posting
after reading several rather terse replies. I've since gotten a bit thicker
skin. I've learned a lot from this list. However, it's not for the timid.
Please be considerate in the wording of your replies.

With my lack of typing skills, my lack of spelling skills, and my lack of
grammar skills, it's a small wonder that anything I post on this list is
understood.

Couple that with most readers not having english as a first language and it
quickly becomes a miracle!

My somewhat simpler interpretation of that error:

if during the named loading process a zone produces an error that says
CNAME and other data, my experience has been that the zone being loaded
contains an A record and one or more CNAME records with the same owner
value (hostname). That's not allowed under the RFC documents for bind.

e.g.

remtest IN A 100.64.0.2
remtest IN CNAME temp.example.com.

-OR-

remtest IN CNAME temp.example.com.
remtest IN CNAME temp001.example.com.

Both examples are not allowed under the RFCs.

Bob
Chuck Aurora
2020-06-18 14:29:29 UTC
Permalink
Post by Ondřej Surý
Jukka and others,
I would prefer if we didn’t scold people for typos on the mailing list.
The typo
in the message had no impact on the question itself, and here, we are
trying
to build community that’s welcoming to newcomers to the wonderful world
of DNS.
Is it a wonderful world? :)

Anyway, the vast majority of errors posted here DO boil down to things
like
the typos and syntax niceties (trailing dot) that Jukka pointed out.
Granted,
in this case that was obviously an email typo, not copied exactly from
the
zone file, but I'd simply suggest that pointing out a typo is not
"scolding."
It's often hard for ME to see MY typos, because I know what I meant to
type;
but for fresh eyes they are much easier to spot.
Larry Stone
2020-06-18 14:33:46 UTC
Permalink
But if there is a possibly relevant spelling error, it would be helpful to point out exactly where the error is rather than just saying “check your spelling”. Our eyes frequently see what we expect to see and therefore don’t see the error, even when told there is an error.
--
Larry Stone
Post by Chuck Aurora
Post by Ondřej Surý
Jukka and others,
I would prefer if we didn’t scold people for typos on the mailing list. The typo
in the message had no impact on the question itself, and here, we are trying
to build community that’s welcoming to newcomers to the wonderful world
of DNS.
Is it a wonderful world? :)
Anyway, the vast majority of errors posted here DO boil down to things like
the typos and syntax niceties (trailing dot) that Jukka pointed out. Granted,
in this case that was obviously an email typo, not copied exactly from the
zone file, but I'd simply suggest that pointing out a typo is not "scolding."
It's often hard for ME to see MY typos, because I know what I meant to type;
but for fresh eyes they are much easier to spot.
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Cathy Almond
2020-06-23 05:53:22 UTC
Permalink
when i am trying to add A and CNAME record together  for the same
subdomain, getting an error as below, you all kind  assistance would be
highly appreciated thanks in  advance
my records are as follows in zone 
auotdiscover IN A 1.1.1.1
autodiscover IN CNAME autodiscover.acig.com.sa
<http://autodiscover.acig.com.sa>
======================================================
dns_master_load: acig.com.sa.hosts:102: autodiscover.a
<http://autodiscover.acig.com.sa/>cig.com.sa <http://cig.com.sa>: CNAME
and other data____
zone acig.com.sa/IN <http://acig.com.sa/IN>: loading from master file
acig.com.sa.hosts failed: CNAME and other data____
zone acig.com.sa/IN <http://acig.com.sa/IN>: not loaded due to errors 
============================================
Late to the party - but we also have a KB article for this:

https://kb.isc.org/docs/aa-01640

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