what are the meanings of these errors ?

[高冲]

the following erros are shown in the named.log.
what are these meanings ?

thanks .

25-Jul-2008 12:22:19.544 unexpected RCODE (SERVFAIL) resolving
't1.dvd88.cn/A/IN': 60.191.110.158#53

25-Jul-2008 12:27:31.352 unexpected RCODE (REFUSED) resolving
'dns2-ftcg.gdsz.cncnet.net/AAAA/IN': 210.21.196.6#53

25-Jul-2008 12:37:02.944 unexpected end of input resolving
'squidclick.bbs.tianya.cn/AAAA/IN': 221.11.172.10#53

25-Jul-2008 12:22:19.701 lame server resolving 'bbs.huangshan.gov.cn' (in
'huangshan.gov.cn'?): 202.102.128.69#53

25-Jul-2008 12:27:31.482 FORMERR resolving 'pingfore.qq.com/AAAA/IN': 60.28.
234.10#53

25-Jul-2008 12:27:30.586 client 219.82.45.219#1730: query:
member1.taobao.com IN AAAA +

25-Jul-2008 12:27:30.588 client 218.108.199.10#530: query:
huoju.icoke.qq.com IN A +

高 冲

[Kevin Darcy]

高冲 wrote:
> the following erros are shown in the named.log.
> what are these meanings ?
>
>
>
> thanks .
>
>
>
> 25-Jul-2008 12:22:19.544 unexpected RCODE (SERVFAIL) resolving
> 't1.dvd88.cn/A/IN': 60.191.110.158#53
>

Remote nameserver gave back a SERVFAIL error for this query. It is now
responding normally, as far as I can tell.

>
>
> 25-Jul-2008 12:27:31.352 unexpected RCODE (REFUSED) resolving
> 'dns2-ftcg.gdsz.cncnet.net/AAAA/IN': 210.21.196.6#53
>

Remote nameserver gave back a REFUSED error for this query. In fact,
both of the delegated nameservers for the domain -- this one and
210.21.220.6 -- are giving REFUSED, so the domain is totally unresolvable.

>
> 25-Jul-2008 12:37:02.944 unexpected end of input resolving
> 'squidclick.bbs.tianya.cn/AAAA/IN': 221.11.172.10#53
>

Response packet from a remote nameserver was malformed.

I can reproduce this issue also. It's actually putting a record of type
AAAA in the Answer Section, but the RDLENGTH is set to 0 (AAAA records
are supposed to have a fixed 16-byte RDATA). The nameserver is also
trying to include all 13 root NS records in the Authority Section, which
is odd since it's authoritative for the closest-enclosing domain
(bbs.tianya.cn). It's seriously confused.

>
>
> 25-Jul-2008 12:22:19.701 lame server resolving 'bbs.huangshan.gov.cn' (in
> 'huangshan.gov.cn'?): 202.102.128.69#53
>

A remote nameserver that was delegated a particular zone
(huangshan.gov.cn), turned out to not be authoritative for it. Otherwise
known as "lame".

I note that neither of the delegated nameservers for huangshan.gov.cn
currently have the address listed above, so it appears they fixed the
problem.

>
> 25-Jul-2008 12:27:31.482 FORMERR resolving 'pingfore.qq.com/AAAA/IN': 60.28.
> 234.10#53
>

Remote nameserver gave a FORMERR (format error) response when trying to
resolve a particular query. If the remote nameserver did not have
support for the AAAA RR type, it should have responded with NOTIMP
instead of FORMERR.

I cannot reproduce this problem -- pingfore.qq.com/AAAA gives a valid
response from the 60.28.234.10 nameserver -- so it's possible this
problem was fixed also. Or, possibly that nameserver is really a cluster
and not all nodes in the cluster have a problem resolving AAAA queries.

>
> 25-Jul-2008 12:27:30.586 client 219.82.45.219#1730: query:
> member1.taobao.com IN AAAA +
>
> 25-Jul-2008 12:27:30.588 client 218.108.199.10#530: query:
> huoju.icoke.qq.com IN A +
>
>

Normal querylog entries, not errors.

- Kevin