DNS resolve problem

Dear All,
I have setup a Primary DNS zone on mac os server 10.6.3 server for testing name bolt.com but when I ping it. It's showing me error ping: cannot resolve the bolt.com: unknown host. I don't know what I have done mistake. I setup up the DNS on mac first time that's why I have not configure it properly please guys help me to enter the mac os x server world.
Regards,
Khalid

You probably don't realize it, but just did the same thing. You're again using a domain that you do not have registered. You don't have example.com registered. Please read the article I linked to. (If something in that article doesn't make sense, please ask.) Either use a completely bogus domain (and that's tougher to construct, if you don't know the DNS domain name formatting rules and how the names are assembled) or (better, easier, safer) get yourself a real and registered domain.
I generally don't use the command line for setting up DNS, I prefer to use Server Admin. Which is what is described in the linked article. I'd let Server Admin guide you to a working configuration.
If you do decide to manage DNS manually, you probably won't be able to use Server Admin in the future.
If you want to follow the command-line path for managing DNS, then please read the available ISC BIND9 documentation or (better) get yourself a copy of Cricket Liu's DNS and BIND book and start reading. The fifth edition of the book was current, when last I looked.
DNS works because folks follow a set of shared practices and guidelines. Not because folks might pick domains or IP address spaces in an uncoordinated fashion. DNS server configuration errors and IP routing errors are among the very few things that one Internet site can do that can screw up access or routing for other Internet sites, too. Hopefully your ISP will have limited the damage you can cause here, though.
If you don't have access to a subdomain of a domain that you have registered or have permission to use, and strictly so you don't have to spend a few currency-units to register a test domain, then.. If you want a completely bogus domain name to test with, then something like myhost.test.khalidinzi is probably safe. test.khalidinzi is your bogus domain, and myhost is a host name within that domain.

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Ace Fekay
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So I'm changing my iptables default policy from ALLOW to DROP, and are tightening up the rules too.
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/etc/resolv.conf
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nameserver 192.168.1.1
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$CMD -A INPUT -i wlan0 -s 192.168.1.1 -p udp --sport 53 -m conntrack --ctstate ESTABLISHED -j ACCEPT
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Last edited by graph (2012-03-20 18:36:23)

Gcool wrote:I'm assuming you just want to allow that box to surf the net?
Yepyep. Sorry for not mentioning that.
192.168.1.1 is my router, and when I'm disabling the firewall, everything is working perfectly. This is with 192.168.1.1 as nameserver in /etc/resolv.conf.
I tried changing my rules to your rules, but I still can't get it to work.
The following is the output while I'm connecting to www.xkcd.com using elinks:
Output of tcpdump -n '(port 80 or 443 or 53)'
without iptables running: pastebin.com
with iptables running: pastebin.com
It seems to me that DNS is working properly, and that iptables is blocking port 80, right?
Last edited by graph (2012-03-20 08:20:44)

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Originally Posted by osbornerd
We are having problems with office.microsoft.com ceasing to resolve through our NW6.5 SP8 within a few minutes of named loading. I can unload and load named again and office.microsoft.com will resolve fine... for a few minutes and then it stops resolving again. All other microsoft.com domains seem to be resolving fine.
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Hello.
I'm having a lot of issues when resolving DNS names on Linux.
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lo="lo 127.0.0.1"
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INTERFACES=(lo eth0)
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This is what it says:
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unfortunately I have a strange problem.
When I try to connect to our file share via NetBios Name everything goes smooth. For example explorer -> enter -> \\abc\test$
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After closing the explorer, waiting some time and entereing
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Actually the file share sould be correctly resolved by dns and displayed in explorer...
Hope I can get some help! Regards

Hi,
Please go head and delete the records from following location.
Dnsmgmt.msc [Dns Management]
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i. Make sure only the actual domain controllers are listed, delete wrong Alias recordsremove wrong name server
records
ii. Select the container [forward lookup zones\_msdcs.domain.com\dc\_sites_\sitename\_tcp] > delete incorrect
_ldap and _kerberos records are listed.
iii. Select the container [forward lookup zones\_msdcs.domain.com\dc\_tcp] and delete incorrect _ldap and
_kerberos records
iv. Expand the [forward lookup zones\_msdcs.domain.com\domains\guid\_tcp] and delete incorrect _ldap entries
v. Select [forward lookup zones\_msdcs.domain.com\gc] – delete incorrect HostA records
vi. Expand the [forward lookup zones\_msdcs.domain.com\gc\_sites\sitename\_tcp] – delete incorrect _ldap entries
vii.Select the [forward lookup zones\_msdcs.domain.com\gc\_tcp] – delete incorrect _ldap entries
viii. Select the [forward lookup zones\_msdcs.domain.com\pdc\_tcp] – delete incorrect _ldap entries
B.Expand the forward lookup zones\domain.com folder
i.Delete Host(A) records of dc’s which are non-existant.
ii.Correct the NameServer (NS) records
iii. Follow steps similar to ’ A ii ‘ >> ‘ A viii’
· Dssite.msc [Sites and Services]
A.Expand the [Sites\Sitename\Servers] – delete incorrect server’s
B.Delete incorrect subnet configurations [Sites\Subnets]
C.Delete incorrect site links [Sites\IP]
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version 15.2
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Hi,
Do you want to use Internal or External dns? You need to add dns to your dhcp pool as below for google dns:
ip dhcp pool my DHCPpool
import all
network 10.208.117.0 255.255.255.0
dns-server 8.8.8.8 8.8.4.4
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Thanks
John

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