| Author | Messages | |
austin
Posts:49
 | | 06/11/2007 4:17 AM |
| v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
I might be wrong but I think you miss the point Yann.
A reverse lookup record resolves an IP to a name. Therefore, on
a DNS server with no Reverse Lookup Zones configured, nslookup or dig -x will
return a failure. What nslookup is saying is correct “I cannot resolve
this IP to a name on this dns server”. It reports a success on the dns
server with a Reverse lookup zone configured.
All this has nothing to do with resolving a name to an IP
address which is what name resolution is all about.
Regards,
Austin
From: ActiveDir-owner@mail.activedir.org
[mailto:ActiveDir-owner@mail.activedir.org] On Behalf Of Yann
Sent: 11 June 2007 20:56
To: ActiveDir@mail.activedir.org
Subject: RE : RE: RE : RE: [ActiveDir] Reverse DNS lookup must be
present for DNS reolution.
Hello,
I totally agree with Deji, but what i do not understand is
why clents do not use their localdns servers instead of using remotedns servers
for name resolution.
Example:
If i do anslookup, i have this reply:
***
Can't find server name for address : Non-existent domain
***
Can't find server name for address : Non-existent domain
server
: remotedns3
IP:
192.168.1.20
workstation1:
workstation1.domain.fr
IP:
192.168.1.12
a
nslookup -q=srv _ldap._tcp.._sites. shows
that the clients find the right DCs in their site, but they still using
remotedns3 as previously.
if i set reverse dns zone for localdns2, then a nslookup
shows this:
*** Can't find server name for address :
Non-existent domain
server : localdns2
IP: 192.168.1.200
workstation1: workstation1.domain.fr
IP: 192.168.1.12
Is there any option in dhcp or elsewhere that tells clients
"if reverse lookupsucceeds against a dns then choose this dns server
for further dns resolution otherwise choose another dns server that can do a
reverse lookup zone" ?
That drives me crazy !
thanks
Yann
Austin Osuide a
écrit:
Yann,
I think what Deji is trying to tell you is that “name
resolution” is working.
However, nslookup tells you a bit more than that and tries to
point you to the absence of the PTR records.
Regards,
Austin
From: ActiveDir-owner@mail.activedir.org
[mailto:ActiveDir-owner@mail.activedir.org] On Behalf Of Brandon Aiken
Sent: 11 June 2007 20:01
To: ActiveDir@mail.activedir.org
Subject: RE: RE : RE: [ActiveDir] Reverse DNS lookup must be present for
DNS reolution.
Yes, that sounds right. J
Reverse DNS zones have to be configured separately from forward
zones. Adding a forward zone doesn’t do anything about the reverse
zone, since for many cases the reverse zone is not sufficiently useful to use.
--
Brandon Aiken
CS/IT Systems Engineer
From:
ActiveDir-owner@mail.activedir.org [mailto:ActiveDir-owner@mail.activedir.org] On
Behalf Of Yann
Sent: Monday, June 11, 2007 2:12 PM
To: ActiveDir@mail.activedir.org
Subject: RE : RE: [ActiveDir] Reverse DNS lookup must be present for DNS
reolution.
Sorry,
What i wanted to say is: all clients have locadns1 as
preferred dns server and localdns2 as backup dns server.
When I set reverse dns zone for localdns1 and set a reverse
dns zone for loaldns2, clients are now able to use local dns 1&2 for
resolution.
If no reverse dns zone are set, then, it is one dns that has
a reverse dns zone (as remotedns3) tha is choosed for further resolution.
I hope i was clear ... :)
Thanks
Yann
Brandon Aiken a écrit:
You’re not making sense. How do you have primary and
secondary DNS zones if all your DNS domains are AD integrated? Well,
secondary I can see, but primary?
--
Brandon Aiken
CS/IT Systems Engineer
From:
ActiveDir-owner@mail.activedir.org [mailto:ActiveDir-owner@mail.activedir.org] On
Behalf Of Yann
Sent: Monday, June 11, 2007 1:50 PM
To: ActiveDir@mail.activedir.org
Subject: [ActiveDir] Reverse DNS lookup must be present for DNS
reolution.
Hello,
I had an issue with reverse dns lookup. When i do a nslookup
then hit enterfrom a worstation, itresponds similar as this:
.on localdns1 => non-existent domain.
. on localdns2 => non-existent domain.
. on remotedns3 => reverse dns lookup succedeed ->
direct resolution succeed with remotedns3 choose as preferred DNS server .
All dns are DC and all DNS iare integrated to AD.
Localdns1&2 are set to primary and secondarydns in
the network card ofall clients.
I have no reverse zone set for localdns1&2 but
remotedns3 has a reverse zone for itself.
DHCP is set to deliver IP, and some other configs to
clients.
It seems that DNS serversmusthave reverse zone
set for themselves, otherwise, these dns will not used for resolution by
clients. The clients try then to find other dns that have reverse zone
setin order for direct resolution to succeed.
For now, i set reverse zone for localdns1&2 and clients
are able to take these 2 localdns as their prefered dns servers.
Any one has already seen this ?
Any help is apreciated.
Thanks,
Yann
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