Re: Turn To Bind-Users For Advice And Help

2022-05-07 Thread tengfei xiao
Hi Anand,

> How did you add this zone to BIND?

We added this zone through OpenStack Desigante. We sent a HTTP request to
Designate for adding a zone. Designate would convert the HTTP request to
RNDC command to add zone to BIND.

Tengfei

Anand Buddhdev  于2022年5月7日周六 16:27写道:

> On 07/05/2022 08:08, tengfei xiao wrote:
>
> Hi Tengfei,
>
> > We are encountering a problem that SOA records had data residue when
> > deleting a new-created zone with BIND 9. The operation procedures are as
> > below:
> >
> > 1. Firstly, a zone named test18.cn was added with BIND 9. The command
> "dig
> > -t SOA test18.cn" shows the corresponding SOA record was created
> > successfully.
>
> How did you add this zone to BIND?
>
> --
> Anand
>
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Re: Determining Which Authoritative Sever to Use

2022-05-07 Thread Ben Croswell
I can't speak definitively for stub zones, but I would assume it works the
same as NS delegations or forwarding.
A DNS server maintains a listing of smoothed round trip times (SRTT) for
each potential destination.  It uses the SRTT with the lowest value, and
after each successful response all of the SRTTs with a higher value are
decremented.  This is the self-healing mechanism.  Eventually a higher
value will be reduced far enough so it is the lowest and it will be used
and readjusted.  The readjusting will likely make it higher and it would go
back to the original server.  This is a long winded way of saying all of
the servers in the list will take a certain percentage of the overall query
volume.

On Sat, May 7, 2022 at 10:20 AM Bob McDonald  wrote:

> Forgive my ignorance if this is a trivial question.
>
> Supposing I have an internal IP network (rfc1918)  where there atr local
> caching servers (recursive) which clients connect to and scattered around
> are several authoritative servers  which provide answers for internal only
> zones. Those internal only zones are defined on the caching servers via
> stub zones.
>
> My question is this; how do the recursive servers determine from
> the information in the stub zone which name server to query? And, is that
> the closest (network wise)? Do I need to put anycast into the mix?
>
> TTFN,
>
> Bob
>
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Determining Which Authoritative Sever to Use

2022-05-07 Thread Bob McDonald
Forgive my ignorance if this is a trivial question.

Supposing I have an internal IP network (rfc1918)  where there atr local
caching servers (recursive) which clients connect to and scattered around
are several authoritative servers  which provide answers for internal only
zones. Those internal only zones are defined on the caching servers via
stub zones.

My question is this; how do the recursive servers determine from
the information in the stub zone which name server to query? And, is that
the closest (network wise)? Do I need to put anycast into the mix?

TTFN,

Bob
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Re: Turn To Bind-Users For Advice And Help

2022-05-07 Thread Anand Buddhdev

On 07/05/2022 08:08, tengfei xiao wrote:

Hi Tengfei,


We are encountering a problem that SOA records had data residue when
deleting a new-created zone with BIND 9. The operation procedures are as
below:

1. Firstly, a zone named test18.cn was added with BIND 9. The command "dig
-t SOA test18.cn" shows the corresponding SOA record was created
successfully.


How did you add this zone to BIND?

--
Anand
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Turn To Bind-Users For Advice And Help

2022-05-07 Thread tengfei xiao
Hi,

We are encountering a problem that SOA records had data residue when
deleting a new-created zone with BIND 9. The operation procedures are as
below:

1. Firstly, a zone named test18.cn was added with BIND 9. The command "dig
-t SOA test18.cn" shows the corresponding SOA record was created
successfully.

2. Secondly, RNDC command "rndc -s 127.0.0.1 -p  953  -k  /etc/rndc.key
delzone  test18.cn" was applied to remove zone "test18.cn".

3. After a few of minutes, "dig -t SOA  test18.cn" was applied again and
found the SOA record still existed.


The BIND version is 9.11.4-P2-RedHat-9.11.4-16.P2.el7. The problem occurred
from time to time. Unfortunately, the logging file "name.run" does not
record any abnormal information.


Any comments or suggestions will be highly appreciated.


Best Regards,
Tengfei
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