Home / Browse / MyDNS / Mail / Archive

MyDNS

Email Archive: mydns-users (read-only)

SV: [mydns-users] SOA not found

From: Erik Dunder <erik.dunder@fs...> - 2005-06-15 10:06

> -----Ursprungligt meddelande-----
> Fr=E5n: mydns-users-admin@...
> [mailto:mydns-users-admin@...] F=F6r Matus=20
> UHLAR - fantomas
> Skickat: den 15 juni 2005 11:21
> Till: mydns-users@...
> =C4mne: Re: [mydns-users] SOA not found
>=20
> On 15.06 11:15, Erik Dunder wrote:
> > I'v been running MyDNS for sometime now and hosing about=20
> 350 domains=20
> > and untill today it hasnt been any problems.
> > The problem I encounter is when a zone only has the NS=20
> records and and=20
> > a CNAME for origin in the rr-table.
>=20
> this configuration is invalid. CNAME cannot coexist with any=20
> other record, including SOA.
Ok, I just understod CNAME couldnt coexist with MX.
Guess i have to read RFC a bit better :)

>=20
> > id,zone,name,type,data,aux,ttl
> > 3502,468,,NS,dns1.se.,0,600
> > 3503,468,,NS,dns2.se.,0,600
> > 3505,468,demo.se.,CNAME,testing.se.,0,600
> >=20
> > I then do a 'dig @dns1.se demo.se SOA' and dont get the NS=20
> results in=20
> > the answer:
> > ;; QUESTION SECTION:
> > ;demo.se.                       IN      SOA
> > ;; ANSWER SECTION:
> > demo.se.                600     IN      SOA     dns1.se.
> > hostmaster.demo.se. 2005061510 28800 7200 604800 600 ;; AUTHORITY=20
> > SECTION:
> > demo.se.                600     IN      CNAME   testing.se.
>=20
> it's incorrect that you get the CNAME. a bug in MyDNS I'd say.
Ok. :)
>=20
> > Why is this a problem anyone might ask.
> > Well, using the .se topdomain the registrar checks the SOA befor=20
> > transfer to the nameservers and if the check is wrong the transfer=20
> > wont succeed.
>=20
> I don't think registrar would accept your zone even if NS=20
> records were provided.=20
>=20
> > In my opinion this is a bug that i would need help fixing.
>=20
> It IS a bug, but on different place than you expect.

Mydnscheck should also be fixed then since it doesnt report any errors =
about "CNAME and other data".

> --
> Matus UHLAR - fantomas, uhlar@... ; 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.
> (R)etry, (A)bort, (C)ancer
>=20
>=20
> -------------------------------------------------------
> SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
> from IBM. Find simple to follow Roadmaps, straightforward articles,
> informative Webcasts and more! Get everything you need to get up to
> speed, fast. =
http://ads.osdn.com/?ad_id=3D7477&alloc_id=3D16492&op=3Dclick
> _______________________________________________

/Erik

Thread View

Thread	Author	Date
SV: [mydns-users] SOA not found	Erik Dunder <erik.dunder@fs...>

Re: [mydns-users] SOA not found

From: David Phillips <electrum@gm...> - 2005-06-15 13:41

On 6/15/05, Erik Dunder <erik.dunder@...> wrote:
> > this configuration is invalid. CNAME cannot coexist with any
> > other record, including SOA.
> Ok, I just understod CNAME couldnt coexist with MX.
> Guess i have to read RFC a bit better :)

See RFC 1034 section 3.6.2 paragraph 3:  "If a CNAME RR is present at
a node, no other data should be present"

This means that a CNAME record for a name will override any other
records for that name, even if they are a different type.  Thus your
NS and MX records get hidden by the CNAME.
=20
> > it's incorrect that you get the CNAME. a bug in MyDNS I'd say.
> Ok. :)

This behavior is intentional and correct:

*  Added check for non-CNAME records for a name that
   has a CNAME record.  The DNS algorithm handles
   these (the non-CNAME records are never examined),
   but some other DNS servers don't, and it would be
   wise to remove them if you plan to use mydnsexport
   or outgoing DNS-based zone transfers.

> Mydnscheck should also be fixed then since it doesnt report any
> errors about "CNAME and other data".

That is a good idea.

--=20
David Phillips <david@...>
http://david.acz.org/

Re: [mydns-users] SOA not found

From: Matus UHLAR - fantomas <uhlar@fa...> - 2005-06-15 14:15

> > > it's incorrect that you get the CNAME. a bug in MyDNS I'd say.

> On 6/15/05, Erik Dunder <erik.dunder@...> wrote:
> > Ok. :)

On 15.06 08:41, David Phillips wrote:
> This behavior is intentional and correct:

note that SOA was sent along with CNAME, I don't think it's correct :)

> *  Added check for non-CNAME records for a name that
>    has a CNAME record.  The DNS algorithm handles
>    these (the non-CNAME records are never examined),
>    but some other DNS servers don't, and it would be
>    wise to remove them if you plan to use mydnsexport
>    or outgoing DNS-based zone transfers.

I think MyDNS should conform to RFC. It could have a priority list, or just
strictly refuse either CNAME or other records if they appear together.

> > Mydnscheck should also be fixed then since it doesnt report any
> > errors about "CNAME and other data".
> 
> That is a good idea.

-- 
Matus UHLAR - fantomas, uhlar@... ; 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.
"One World. One Web. One Program." - Microsoft promotional advertisement
"Ein Volk, ein Reich, ein Fuhrer!" - Adolf Hitler