Re: [Ilugc] DNS server configuration query

[Shrinivasan T]

> WARNING: key file (/etc/rndc.key) exists, but using default configuration
> file (/etc/rndc.conf)
> rndc: get config key list: not found
> named-sdb is stopped

Search in any search with the error message.
You will get the answers, mostly.

If you search and did not get answers, then ask here.

I searched for you and got this link.
http://tecadmin.net/configure-rndc-for-bind9/

Follow this and proceed.




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T.Shrinivasan


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Re: [Ilugc] DNS server configuration query

[Sundar Raj]

Dear Srinivasan ,

 I followed the same..But now when i try to start the service it says its
failed .
when i give service named status .i get following error message.


WARNING: key file (/etc/rndc.key) exists, but using default configuration
file (/etc/rndc.conf)
rndc: get config key list: not found
named-sdb is stopped

regds,
Sundar


On Tue, Oct 14, 2014 at 1:16 PM, Shrinivasan T 
wrote:

> > I am trying to configure DNS server in centos 6.5. Once i start named
> > service i am getting following error.
> > May i know where i am wrong.
> >
> >
> > [root@dellmachine1 Desktop]# service named restart
> > Stopping named:[  OK  ]
> > Starting named:
> > Error in named configuration:
> > zone vel.com/IN: has no NS records
> > zone vel.com/IN: not loaded due to errors.
> > _default/vel.com/IN: bad zone
> > dns_rdata_fromtext: reverse.vel.com.zone:8: near eol: unexpected end of
> > input
> > zone 0.0.10.in-addr.arpa/IN: loading from master file
> reverse.vel.com.zone
> > failed: unexpected end of input
>
>
> Check the file vel.com
> it seems no zone data is entered.
>
> Check reverse.vel.com line 8.
>
> compare the formats with
>
> http://www.unixmen.com/dns-server-installation-step-by-step-using-centos-6-3/
>
>
>
> --
> Regards,
> T.Shrinivasan
>
>
> My Life with GNU/Linux : http://goinggnu.wordpress.com
> Free E-Magazine on Free Open Source Software in Tamil : http://kaniyam.com
>
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Re: [Ilugc] DNS server configuration query

[Arun Khan]

On Tue, Oct 14, 2014 at 1:11 PM, Sundar Raj  wrote:
> Dear Friends ,
>
>
> I am trying to configure DNS server in centos 6.5. Once i start named
> service i am getting following error.
> May i know where i am wrong.
>
>
> [root@dellmachine1 Desktop]# service named restart
> Stopping named:[  OK  ]
> Starting named:
> Error in named configuration:
> zone vel.com/IN: has no NS records   read this error 
> message

First fix the above before targeting other error messages from BIND.
I suggest you get an understanding on how DNS works if you have not done so.

SOA, NS records are mandatory.

HTH
-- Arun Khan
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Re: [Ilugc] DNS server configuration query

[Shrinivasan T]

> I am trying to configure DNS server in centos 6.5. Once i start named
> service i am getting following error.
> May i know where i am wrong.
>
>
> [root@dellmachine1 Desktop]# service named restart
> Stopping named:[  OK  ]
> Starting named:
> Error in named configuration:
> zone vel.com/IN: has no NS records
> zone vel.com/IN: not loaded due to errors.
> _default/vel.com/IN: bad zone
> dns_rdata_fromtext: reverse.vel.com.zone:8: near eol: unexpected end of
> input
> zone 0.0.10.in-addr.arpa/IN: loading from master file reverse.vel.com.zone
> failed: unexpected end of input


Check the file vel.com
it seems no zone data is entered.

Check reverse.vel.com line 8.

compare the formats with
http://www.unixmen.com/dns-server-installation-step-by-step-using-centos-6-3/



-- 
Regards,
T.Shrinivasan


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[Ilugc] DNS server configuration query

[Sundar Raj]

Dear Friends ,


I am trying to configure DNS server in centos 6.5. Once i start named
service i am getting following error.
May i know where i am wrong.


[root@dellmachine1 Desktop]# service named restart
Stopping named:[  OK  ]
Starting named:
Error in named configuration:
zone vel.com/IN: has no NS records
zone vel.com/IN: not loaded due to errors.
_default/vel.com/IN: bad zone
dns_rdata_fromtext: reverse.vel.com.zone:8: near eol: unexpected end of
input
zone 0.0.10.in-addr.arpa/IN: loading from master file reverse.vel.com.zone
failed: unexpected end of input
zone 0.0.10.in-addr.arpa/IN: not loaded due to errors.
_default/0.0.10.in-addr.arpa/IN: unexpected end of input
zone localhost.localdomain/IN: loaded serial 0
zone localhost/IN: loaded serial 0
zone
1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN:
loaded serial 0
zone 1.0.0.127.in-addr.arpa/IN: loaded serial 0
zone 0.in-addr.arpa/IN: loaded serial 0
   [FAILED]

regds,
Sundar
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Re: [Ilugc] DNS-Cache Server

[Arun Khan]

On Thu, Aug 22, 2013 at 5:22 PM, Mohamed Mushab  wrote:
> Hi All,
>
> Please let me know how to setup DNS-cache on Ubuntu server which is
> having Zentyal Firewall.

Please make the effort to read/learn more about Zentyal (doc.zentyal.org/en).

Had you done so, you would have seen that It already has a DNS module.

-- Arun Khan
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Re: [Ilugc] DNS-Cache Server

[Tushar Rishabadas]

On Thursday, 22 August 2013, Mohamed Mushab wrote:

> Hi All,
>
> Please let me know how to setup DNS-cache on Ubuntu server which is
> having Zentyal Firewall.
>
> I had setup an local server to serve my office network. All the client
> machines are getting ip address through DHCP from the local server.
> In client machine while surfing the Internet if i tried to open
> google.com for the 1st 2 times it says page not found, on the 3rd time
> it open google page. This is happening for all the sites.
>
> And came to know that to resolve this issue i had to install
> dns-cache. so please help me with the guide.
>
> Is there any step by step giude ?


http://www.google.com/search?btnG=1&pws=0&q=install+caching+dns+server+ubuntu


>
>
> --
> With Regards
> Mohamed Mushab,
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[Ilugc] DNS-Cache Server

[Mohamed Mushab]

Hi All,

Please let me know how to setup DNS-cache on Ubuntu server which is
having Zentyal Firewall.

I had setup an local server to serve my office network. All the client
machines are getting ip address through DHCP from the local server.
In client machine while surfing the Internet if i tried to open
google.com for the 1st 2 times it says page not found, on the 3rd time
it open google page. This is happening for all the sites.

And came to know that to resolve this issue i had to install
dns-cache. so please help me with the guide.

Is there any step by step giude ?


-- 
With Regards
Mohamed Mushab,
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Re: [Ilugc] DNS issues

[Mehul Ved]

On Wed, Dec 5, 2012 at 11:38 PM, ashwin kesavan  wrote:
> Hi,
>
> I see a strange dns problem. When i do a dig  it resolves
> to a ip that i own. This ip is in USA and i am doing dig from chennai. My
> ISP and this USA hosting providers have no known relation. Then how is
> the dns name is able to resolve to my hosted ip ? Strange thing is online
> dns lookup tools don't resolve to this IP. Why does my dig is able to
> resolve while online tools aren't ? I dont have any hosts entry.

Have you modified your /etc/resolv.conf file to include nameserver of that host?
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Re: [Ilugc] DNS issues

[Arun Khan]

On Wed, Dec 5, 2012 at 11:38 PM, ashwin kesavan  wrote:
> Hi,
>
> I see a strange dns problem. When i do a dig  it resolves
> to a ip that i own. This ip is in USA and i am doing dig from chennai. My
> ISP and this USA hosting providers have no known relation.

Everything is resolved by  the NS records for your domain.
Have you *changed*  the NS records for your domain within the last
couple of days?   The NS changes take a few hours to propagate.

> Then how is
> the dns name is able to resolve to my hosted ip ?

What is the problem here?  Isn't this what you want it to be?

> Strange thing is online
> dns lookup tools don't resolve to this IP.
> Why does my dig is able to
> resolve while online tools aren't ?

The sites must be using an old cache. IMO you should pose the question to them.

> I dont have any hosts entry.

Great - many a times the problem is the hosts file.
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Re: [Ilugc] DNS issues

[Girish Venkatachalam]

dig has nothing to do with hosts. It uses bind and internet servers for DNS.

hosts is the file lookup method in /etc/resolv.conf. This has nothing
to do with BIND
 or dig.

$ dig @8.8.8.8 

man dig

On Wed, Dec 5, 2012 at 11:38 PM, ashwin kesavan  wrote:
> Hi,
>
> I see a strange dns problem. When i do a dig  it resolves
> to a ip that i own. This ip is in USA and i am doing dig from chennai. My
> ISP and this USA hosting providers have no known relation. Then how is
> the dns name is able to resolve to my hosted ip ? Strange thing is online
> dns lookup tools don't resolve to this IP. Why does my dig is able to
> resolve while online tools aren't ? I dont have any hosts entry.
>
> with regards,
> ashwin
>
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[Ilugc] DNS issues

[ashwin kesavan]

Hi,

I see a strange dns problem. When i do a dig  it resolves 
to a ip that i own. This ip is in USA and i am doing dig from chennai. My 
ISP and this USA hosting providers have no known relation. Then how is 
the dns name is able to resolve to my hosted ip ? Strange thing is online 
dns lookup tools don't resolve to this IP. Why does my dig is able to 
resolve while online tools aren't ? I dont have any hosts entry.

with regards,
ashwin

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Re: [Ilugc] DNS problem

[Girish Venkatachalam]

Linux can resolve NetBIOS names only thro' Samba.

smbclient

On Tue, Apr 3, 2012 at 3:04 PM, Karthikeyan Venkatraman
 wrote:
> On Tue, Apr 3, 2012 at 2:47 PM, Shrinivasan T wrote:
>
>> >
>> > The problem is when I do nslookup to ubuntu machine I am getting an error
>> > "** server can't find 205.35.112.10.in-addr.arpa.: NXDOMAIN"
>> >
>>
>>
>> Did you setup forward zone and reverse zone entries for all ubuntu
>> computers in the DNS server?
>>
>> --
>> Regards,
>> T.Shrinivasan
>>
>>
>> My Life with GNU/Linux : http://goinggnu.wordpress.com
>> Free/Open Source Jobs : http://fossjobs.in
>>
>> Get CollabNet Subversion Edge :     http://www.collab.net/svnedge
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>>
>
>
> Actually forward & reverse zones are configured in the DNS servers. I can't
> able to access my DNS server since there is no control for me. But when I
> try to search in Active directory I can able to see the ubuntu machine in
> the server OU. Hope I assume there will be an A record for the ubuntu
> machine also.
>
> In Windows PC, if i enter the DNS address in the TCP/IP properties the
> netbios name resolve perfectly even the machine not in the member of
> domain. What configuration requires in linux machine to work like windows
> machine.
> --
> Thanks,
> V. Karthick
>
> My Experience shared in : http://vkarthickeyan.wordpress.com
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Re: [Ilugc] DNS problem

[Karthikeyan Venkatraman]

On Tue, Apr 3, 2012 at 2:47 PM, Shrinivasan T wrote:

> >
> > The problem is when I do nslookup to ubuntu machine I am getting an error
> > "** server can't find 205.35.112.10.in-addr.arpa.: NXDOMAIN"
> >
>
>
> Did you setup forward zone and reverse zone entries for all ubuntu
> computers in the DNS server?
>
> --
> Regards,
> T.Shrinivasan
>
>
> My Life with GNU/Linux : http://goinggnu.wordpress.com
> Free/Open Source Jobs : http://fossjobs.in
>
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>


Actually forward & reverse zones are configured in the DNS servers. I can't
able to access my DNS server since there is no control for me. But when I
try to search in Active directory I can able to see the ubuntu machine in
the server OU. Hope I assume there will be an A record for the ubuntu
machine also.

In Windows PC, if i enter the DNS address in the TCP/IP properties the
netbios name resolve perfectly even the machine not in the member of
domain. What configuration requires in linux machine to work like windows
machine.
-- 
Thanks,
V. Karthick

My Experience shared in : http://vkarthickeyan.wordpress.com
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Re: [Ilugc] DNS problem

[Shrinivasan T]

>
> The problem is when I do nslookup to ubuntu machine I am getting an error
> "** server can't find 205.35.112.10.in-addr.arpa.: NXDOMAIN"
>


Did you setup forward zone and reverse zone entries for all ubuntu
computers in the DNS server?

-- 
Regards,
T.Shrinivasan


My Life with GNU/Linux : http://goinggnu.wordpress.com
Free/Open Source Jobs : http://fossjobs.in

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Re: [Ilugc] Dns resolving issue

[Arun Khan]

On Fri, Feb 25, 2011 at 12:25 PM, Kenneth Gonsalves
 wrote:
> On Fri, 2011-02-25 at 12:19 +0530, Arun Khan wrote:
>> My domain registrar (GoDaddy) says it *may* take 48-72 hours for the
>> changes to propagate worldwide.
>
> I found that changes are seen very quickly in my laptop (no proxy), but

Are you running a caching DNS server on your laptop?  I have also seen
changes propagate within a few minutes to my own intranet caching DNS
server.

> take a long time to penetrate squid in the office.

Assuming that you have done things correctly on your DNS tables:

The point is - DNS records from your SOA server are pulled by other
DNS servers and cached.   Besides setting the TTL values etc, your SOA
DNS server has no control over the other DNS servers; which is the
point made by Raja.

Your proxy server is probably caching the DNS entries as well.  As a
test, make a change in your DNS then stop/start your proxy server.
See if the change is picked up the Proxy server.

-- Arun Khan
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Re: [Ilugc] Dns resolving issue

[Kenneth Gonsalves]

On Fri, 2011-02-25 at 12:19 +0530, Arun Khan wrote:
> My domain registrar (GoDaddy) says it *may* take 48-72 hours for the
> changes to propagate worldwide. 

I found that changes are seen very quickly in my laptop (no proxy), but
take a long time to penetrate squid in the office.
-- 
regards
KG
http://lawgon.livejournal.com
Coimbatore LUG rox
http://ilugcbe.techstud.org/

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Re: [Ilugc] Dns resolving issue

[Kenneth Gonsalves]

On Fri, 2011-02-25 at 12:13 +0530, Raja Subramanian wrote:
> On Fri, Feb 25, 2011 at 11:19 AM, Kenneth Gonsalves
>  wrote:
> > in which century was this? it propagates in 10 minutes to a couple
> of
> > hours
> 
> By the specs, DNS caches should honor the domain's TTL values.
> But there are several misconfigured relics (typically HP/Solaris bind)
> run by ISPs till date which blindly cache all zones for 2 days. 

actually my reaction is a bit of knee jerk - I have very frequently
faced the problem where someone goofs up in setting the DNS and blames
it on time to propagate. Usually after a week or so, the guys finally
realises his mistake.
-- 
regards
KG
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Re: [Ilugc] Dns resolving issue

[Arun Khan]

On Fri, Feb 25, 2011 at 11:19 AM, Kenneth Gonsalves
 wrote:
> On Thu, 2011-02-24 at 23:18 +0530, Akilan R wrote:
>> On Thu, Feb 24, 2011 at 11:10 PM, Thanigai rajan
>> wrote:
>>
>> > Today I changed the IP of a particular domain,
>>
>>
>> It will take 24 hours to 3 days for DNS
>
> in which century was this? it propagates in 10 minutes to a couple of
> hours

This is the best case scenario; you may have been lucky to see the
changes come through this fast.

My domain registrar (GoDaddy) says it *may* take 48-72 hours for the
changes to propagate worldwide.  Changes are "pulled" by the various
DNS servers and some may not if the host is in it's cache.

A crippled workaround to this problem is:

1. define a new host name in your DNS server
2. force the "DNS" server to resolve this name i.e. host 
ip_of_dns_server

This will force the DNS server to query the SOA, realize the change in
serial etc and update it's cache.

As a rule of thumb fundamental changes to the domain entries should be
done over the weekend.

HTH
-- Arun Khan
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Re: [Ilugc] Dns resolving issue

[Raja Subramanian]

On Fri, Feb 25, 2011 at 11:19 AM, Kenneth Gonsalves
 wrote:
> in which century was this? it propagates in 10 minutes to a couple of
> hours

By the specs, DNS caches should honor the domain's TTL values.
But there are several misconfigured relics (typically HP/Solaris bind)
run by ISPs till date which blindly cache all zones for 2 days.

- Raja
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Re: [Ilugc] Dns resolving issue

[Kenneth Gonsalves]

On Thu, 2011-02-24 at 23:18 +0530, Akilan R wrote:
> On Thu, Feb 24, 2011 at 11:10 PM, Thanigai rajan
> wrote:
> 
> > Today I changed the IP of a particular domain,
> 
> 
> It will take 24 hours to 3 days for DNS 

in which century was this? it propagates in 10 minutes to a couple of
hours
-- 
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Re: [Ilugc] Dns resolving issue

[Thanigai rajan]

>You have to wait and did you up the serial?
Yes, I increased the Serial.
-- 

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MThanigairajan

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Re: [Ilugc] Dns resolving issue

[Girish Venkatachalam]

You have to wait and did you up the serial?

On Thu, Feb 24, 2011 at 11:10 PM, Thanigai rajan  wrote:
> Hi,
>
> I am facing an issue with DNS resolving.
> The scenario is,
> I am having my own DNS Server with public IP and it is serving for many
> domains.
> Today I changed the IP of a particular domain,
>                     say I changed the IP address of abc.com from 1.2.3.4
> into 5.6.7.8
> So I put the "A" record for abc.com as 5.6.7.8 and also I put the "A" record
> for www.abc.com as 5.6.7.8 in my zone files of master & slave servers.
>
> The www.abc.com is resolving in new ip everywhere.
> But still abc.com is resolving in older IP  in many places. (I checked with
> some of my friend's offices & like kloth.net sites)
> my need is , abc.com has to resolve in new ip .
> How can i sort out this issue?
> --
>
> Thanks & Regards
> MThanigairajan
>
> The Most Certain Way To Succeed Is To Try One More Time
>
>     -- By Edison
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Re: [Ilugc] Dns resolving issue

[Akilan R]

On Thu, Feb 24, 2011 at 11:10 PM, Thanigai rajan wrote:

> Today I changed the IP of a particular domain,


It will take 24 hours to 3 days for DNS to fully propagate. Also, in this
scenario it is better to put a CNAME pointing www.abc.com to abc.com rather
than two 'A' records, IMHO.

-- 
அகிலன் (Akilan R)
[ blog.akilan.in ]
*I should have no use for a paradise in which I should be deprived of the
right to prefer hell.*
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[Ilugc] Dns resolving issue

[Thanigai rajan]

Hi,

I am facing an issue with DNS resolving.
The scenario is,
I am having my own DNS Server with public IP and it is serving for many
domains.
Today I changed the IP of a particular domain,
 say I changed the IP address of abc.com from 1.2.3.4
into 5.6.7.8
So I put the "A" record for abc.com as 5.6.7.8 and also I put the "A" record
for www.abc.com as 5.6.7.8 in my zone files of master & slave servers.

The www.abc.com is resolving in new ip everywhere.
But still abc.com is resolving in older IP  in many places. (I checked with
some of my friend's offices & like kloth.net sites)
my need is , abc.com has to resolve in new ip .
How can i sort out this issue?
-- 

Thanks & Regards
MThanigairajan

The Most Certain Way To Succeed Is To Try One More Time

 -- By Edison
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Re: [Ilugc] dns

[baskar k]

Hi bhoobesh
On Sun, Jul 4, 2010 at 5:12 PM, bhoobesh  wrote:
> sir please tell me the configuration file of dns in redhat linux 5
>
Are you trying to setup dns or you want to configure dns at client
side. Please be more specific

Thanks
baskar
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Re: [Ilugc] dns

[Murali Babu]

Hello linuxers,

this link may be help you to configure the dns on redhat 5.0

http://www.redhat.com/magazine/026dec06/features/dns/

On Sun, Jul 4, 2010 at 11:14 PM, ashwin kesavan wrote:

> On 4 July 2010 17:12, bhoobesh  wrote:
> > sir please tell me the configuration file of dns in redhat linux 5
>
> For client side dns server , ie., primary dns server and secondary dns
> server ip are stored in /etc/resolv.conf .
>
> HTH
> ashwin K.
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Re: [Ilugc] dns

[ashwin kesavan]

On 4 July 2010 17:12, bhoobesh  wrote:
> sir please tell me the configuration file of dns in redhat linux 5

For client side dns server , ie., primary dns server and secondary dns
server ip are stored in /etc/resolv.conf .

HTH
ashwin K.
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Re: [Ilugc] dns

[Arun Khan]

On Sun, Jul 4, 2010 at 5:12 PM, bhoobesh  wrote:
> sir please tell me the configuration file of dns in redhat linux 5

man named.conf

-- Arun Khan
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[Ilugc] dns

[bhoobesh]

sir please tell me the configuration file of dns in redhat linux 5
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Re: [Ilugc] dns

[Arun Khan]

On Fri, Apr 23, 2010 at 7:51 PM, Girish Venkatachalam
 wrote:
> On Fri, Apr 23, 2010 at 10:03 AM, bhoobesh  wrote:
>> sir please tell me the  any books for configuring dns server in centos
>
> Well I dunno about Centos.
>
> You need to edit zone files and so on. They have an arcane syntax.

That is only if you want bind to be SOA for a specific domain.
Otherwise, no changes needed for a cache only name server.  Do
"chkconfig named on"  named could be bind - not sure about CentOS>

But the OP was *absolutely* ambigous about what s/he wants.

>
> In OpenBSD you have a chrooted named that drops privileges and runs securely
>  with a non root user ID.
>
> Everything is preconfigured.
>
> All you need to do is have a line
>
> named_conf=""
>
> in /etc/rc.conf.local file.
>
> And reboot.
>
> You get a fully functional DNS server.

You mean I don't need to setup _any_ files if I want to be setup a DNS
server for say "intra.example.com" which has 'x' no. of hosts on
Intranet my network?

-- Arun Khan
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Re: [Ilugc] dns

[Girish Venkatachalam]

On Fri, Apr 23, 2010 at 7:51 PM, Girish Venkatachalam
 wrote:
> All you need to do is have a line
>
> named_conf=""

Not named_conf=

It should be

named_flags=""

Bad memory. ;)

-Girish
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Re: [Ilugc] dns

[Girish Venkatachalam]

On Fri, Apr 23, 2010 at 10:03 AM, bhoobesh  wrote:
> sir please tell me the  any books for configuring dns server in centos

Well I dunno about Centos.

You need to edit zone files and so on. They have an arcane syntax.

In OpenBSD you have a chrooted named that drops privileges and runs securely
 with a non root user ID.

Everything is preconfigured.

All you need to do is have a line

named_conf=""

in /etc/rc.conf.local file.

And reboot.

You get a fully functional DNS server.

It is that cool.

-Girish


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Re: [Ilugc] dns

[Shrinivasan T]

On Fri, Apr 23, 2010 at 10:03 AM, bhoobesh  wrote:
> sir please tell me the  any books for configuring dns server in centos

Hi,

see this link.

http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch18_:_Configuring_DNS

Please do a google search before asking any question in any mailing list.

-- 
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T.Shrinivasan


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Re: [Ilugc] dns

[Arun Khan]

On Fri, Apr 23, 2010 at 10:03 AM, bhoobesh  wrote:
> sir please tell me the  any books for configuring dns server in centos

This topic has been discussed ***within the last two days***!  April
21, 2010 to be precise!

Are you not reading the messages from this list?  Please search the
archives and you will get the answers.

Remember, this mailing list is not a paid help desk;  one of the list
guidelines you are expected to follow, is to search the archives.

-- Arun Khan
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[Ilugc] dns

[bhoobesh]

sir please tell me the  any books for configuring dns server in centos
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Re: [Ilugc] dns

[Arun Khan]

On Tue, Apr 20, 2010 at 11:14 PM, Raja Subramanian
 wrote:
> On Tue, Apr 20, 2010 at 8:39 PM, bhoobesh  wrote:
>> how to install dns in cent os please sir/madam
>
> You'll find the answers in the deployment guide:
>
> http://www.centos.org/docs/5/html/Deployment_Guide-en-US/
>
>
> Next time, please check documentation on the CentOS
> website.  CentOS/RedHat documentation is plentiful, a
> web search should turn up plenty of useful documentation.
> If you get stuck following the documentation, post back
> for help with error messages and other details.
>

This is a great place to deal with CentOS specific considerations.
However, IMO, it is also imperative to understand how DNS works (or
for that matter any service that one wants to deploy), at least at a
macro level i.e. action/re-action between client, server and root
servers.   I find this kind of research/curiosity lacking from the way
the questions are posed.- just tell me what to do, I don't care how
the service works.   The result is that we end up with unbaked
network/system admins who claim they know "xyz" service.

To the OP please do the following:

(a) spend the time on understanding how DNS works.   It is the most
essential service that forms the platform for practically all other
network services.d   If you don't get it right then nothing else will
work. TLDP (www.tldp.org) has  a nice HOW-TO which delves into the
basics of DNS a good starting point.  "DNS and Bind" by O'Reilly is
another great resource for DNS workings just as this is
.  Both start from the basics and
then move on to BIND configuration.

(b) BIND is the default DNS server in most Linux distros.   However,
the config files can be organized in different ways.  The config file
organization in  RHEL/Fedor/CentOS is different from that of Debian
which is quite different from that of openSUSE.   Therefore, mention
which distro you are using and the version of BIND as well.

HTH
-- Arun Khan
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Re: [Ilugc] dns

[Raja Subramanian]

On Tue, Apr 20, 2010 at 8:39 PM, bhoobesh  wrote:
> how to install dns in cent os please sir/madam

You'll find the answers in the deployment guide:

http://www.centos.org/docs/5/html/Deployment_Guide-en-US/


Next time, please check documentation on the CentOS
website.  CentOS/RedHat documentation is plentiful, a
web search should turn up plenty of useful documentation.
If you get stuck following the documentation, post back
for help with error messages and other details.

- Raja
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Re: [Ilugc] dns

[Immanuel Jeyaraj]

Why do you need a DNS set up...

anyways, here is the procedure...

as root run the following... I am assuming you are using CentOS5.4

yum install dns
you will need some basic DNS zone files. If you are using GUI then
install system admin scrips

yum system-config-bind

run the system-config-bind. It will complain that you don't have
certain zone files. It will offer to create them for you... accept it.

now you can use your favorite editor to create your zone file...

nano / gedit /var/named/chroot/etc/named.conf

You need to create your DNS server config file... it is our of scope
of this email...

after which you need to create 2 zone files (forward and reverse zone
files)... it is out of scope of this email...

after which you need to restart your dns server by issueing

service named restart

well, when you restart if you want your DNS server to start automatic then type

chkconfig named on

that is it...

On Tue, Apr 20, 2010 at 8:39 PM, bhoobesh  wrote:
> sir
> how to install dns in cent os please sir/madam
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[Ilugc] dns

[bhoobesh]

sir
how to install dns in cent os please sir/madam
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Re: [Ilugc] DNS Zone File Clarification - BIND

[Roshan George]

On Thu, 2010-02-18 at 18:55 +0530, Yogesh wrote:
> 
> I was just reading thru the docs and got confused. Yes! I realize it's a bad
> idea anyway to  point to another CNAME. Thanks a million !!

Glad I could help, you're welcome.
-- 
Roshan George 

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Re: [Ilugc] DNS Zone File Clarification - BIND

[Yogesh]

2010/2/18 Roshan George 

>  It doubles the number of
> requests on the nameserver.


I was just reading thru the docs and got confused. Yes! I realize it's a bad
idea anyway to  point to another CNAME. Thanks a million !!

Yogesh.
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Re: [Ilugc] DNS Zone File Clarification - BIND

[Roshan George]

On Thu, 2010-02-18 at 16:39 +0530, Yogesh wrote:
> Good Day,
> 
> I'm setting up a DNS server using BIND. I have a small clarification to
> make.
> 
> https://help.ubuntu.com/community/BIND9ServerHowto#Alias%20Records
> 
> The above link says that you cannot point one CNAME record to another. Which
> means:
> 
> ns  A10.10.5.5
> www  CNAME   ns
> test   CNAME   www
> 
> is illegal, right? The wikipedia article has an example for the contents of
> the  zone file, which has a CNAME pointing to another CNAME. I'm a bit
> confused.. Please help. Can you also point me to the right RFC to look into
> ?? I'm looking at RFC 1035 but can't find any reference to this. Or may be I
> simply fail to see where it's mentioned.

It's in RFC 1034 at the end of Section 3.6.2. It is legal and BIND will
support it. Why would you do that, though? It doubles the number of
requests on the nameserver.

-- 
Roshan George 

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[Ilugc] DNS Zone File Clarification - BIND

[Yogesh]

Good Day,

I'm setting up a DNS server using BIND. I have a small clarification to
make.

https://help.ubuntu.com/community/BIND9ServerHowto#Alias%20Records

The above link says that you cannot point one CNAME record to another. Which
means:

ns  A10.10.5.5
www  CNAME   ns
test   CNAME   www

is illegal, right? The wikipedia article has an example for the contents of
the  zone file, which has a CNAME pointing to another CNAME. I'm a bit
confused.. Please help. Can you also point me to the right RFC to look into
?? I'm looking at RFC 1035 but can't find any reference to this. Or may be I
simply fail to see where it's mentioned.

http://en.wikipedia.org/wiki/Zone_file

Thank You,
Yogesh.
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Re: [Ilugc] DNS

[Arun Khan]

On Mon, Feb 15, 2010 at 12:39 PM, Saravanan S  wrote:
> Hi Kannan,
>
> On Mon, Feb 15, 2010 at 12:11 PM, kannan kesavan wrote:
>
>>
>> so pls guide me how to installation of  dns and how to configure ?
>>
>
> There are two ways available for dns, one with the actual dns setup, and
> other dns-kind of simple way with manual entries in resolv.conf.
>
> http://www.cyberciti.biz/tips/linux-how-to-setup-as-dns-client.html

The way I understood the OP, he wants to setup DNS zone and not just
be a consumer from some other server that gets referenced via
/etc/resolv.conf

The quick (and archaic) way would be to add entries in /etc/hosts.
This works great when you have only one machine in your setup - no
overhead of installing BIND, creating forward and reverse maps etc.

See "man 5 hosts" for the format of each entry and also make sure that
/etc/nsswitch.conf has an entry like:

"hosts:  files mdns4_minimal [NOTFOUND=return] dns"

"files" must be the first entry; it forces the name resolver to look
at /etc/hosts first before querying a DNS server.

> and how to create domain and sub - domain ?
>> how to use that ?
>>
>
> This you can do by configuring / adding Virtual Hosts entries in the  web
> server config.

IMO, this is an incorrect answer.   To be able to do the above you
still need the Vhosts to be defined in a DNS table (or /etc/hosts if
*all* name resolutions are done on one and only one machine).

To set up a  "zone" associated with a domain name,  OP needs to
register a domain name with a registrar and use that domain name.
Zones for sub-domains can be created by prefixing a name to the
registered domain name.   I have seen people use domain names
registered for other entities internally - that creates problems and
should be avoided.

So for instance, let's say the domain name is registered as
example.com.   A sub domains can be intra.example.com, further sub
domains could be chennai.intra.example.com etc.  I hope you get the
picture.

BIND has excellent docs that come bundled with the software.   I
suggest to OP to read those first and then ask specific queries on
things that you do not understand.

HTH
-- Arun Khan
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Re: [Ilugc] DNS

[Rajagopal Swaminathan]

Greetings,

On Mon, Feb 15, 2010 at 12:11 PM, kannan kesavan  wrote:
> hi guys
> i am new one on dns
> so pls guide me how to installation of  dns and how to configure ?
> and how to create domain and sub - domain ?
> how to use that ?


Let me hazard a guess at what you want to achive:

1. You want to use computer names using part or full FQDN e.g. ping
yourcomputer.yourdomain.com

2. You want a private set of computer names within your own premises
to appear in your network and not to the outside world.

3. You want to use the computer/domain names from the publicly
available one from all the computers within your network and you want
those names to be stored locally on your DNS server.

4. You want to know how to setup a dns server to address 1,2 and 3
above in a step by step way while understanding why each step has to
be taken and with what alternatives, if any.

Is your question understood properly?

Regards,

Rajagopal
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Re: [Ilugc] DNS

[Saravanan S]

Hi Kannan,

On Mon, Feb 15, 2010 at 12:11 PM, kannan kesavan wrote:

>
> so pls guide me how to installation of  dns and how to configure ?
>

There are two ways available for dns, one with the actual dns setup, and
other dns-kind of simple way with manual entries in resolv.conf.

http://www.cyberciti.biz/tips/linux-how-to-setup-as-dns-client.html

and how to create domain and sub - domain ?
> how to use that ?
>

This you can do by configuring / adding Virtual Hosts entries in the  web
server config.

HTH :)

Saravanan Sundaramoorthy
Red Hat Certified Engineer
+91 99404 32545
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Re: [Ilugc] DNS

[Mehul Ved]

On Mon, Feb 15, 2010 at 12:11 PM, kannan kesavan wrote:

> hi guys
> i am new one on dns
>

What does that mean?


> so pls guide me how to installation of  dns and how to configure ?
>

http://www.howtoforge.com/howtos/dns


> and how to create domain and sub - domain ?
> how to use that ?
>

How to use what?
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[Ilugc] DNS

[kannan kesavan]

hi guys
i am new one on dns
so pls guide me how to installation of  dns and how to configure ?
and how to create domain and sub - domain ?
how to use that ?
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Re: [Ilugc] DNS

[Bharathi Subramanian]

On 11:55am, kannan kesavan wrote:

Kannan: Please do some home work before asking in the list.

> i am new in DNS server on centos 5.3 so pls guide me how to install
> and configuration of dns? and hot to check dns is working or not ?

http://www.wains.be/index.php/2007/12/13/centos-5-chroot-dns-with-bind/
http://www.aoddy.com/2007/11/18/how-to-install-dns-server-on-centos-5/

Bye :)
-- 
Bharathi S

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Re: [Ilugc] DNS

[balachandar muruganantham]

On Fri, Feb 5, 2010 at 11:55 AM, kannan kesavan wrote:

> hi guys
> i am new in DNS server on centos 5.3
> so pls guide me
> how to install and configuration of dns?
> and
> hot to check dns is working or not ?
>

read  most of the links and u will get answers for your questions.
http://www.google.com/search?q=how+to+install+and+configuration+of+dns+in+CENTOS

- balachandar muruganantham
உலகம்.net - இலவச தமிழ் வலைப்பதிவுச் சேவை - http://ulagam.net
எனது தமிழ் பக்கங்கள் - http://www.balachandar.net/pakkangal
Beyond Work - http://beyondwork.wordpress.com/
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: 21
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Re: [Ilugc] DNS

[sivakumar]

> i am new in DNS server on centos 5.3
> so pls guide me
Why do you need a DNS ?

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[Ilugc] DNS

[kannan kesavan]

hi guys
i am new in DNS server on centos 5.3
so pls guide me
how to install and configuration of dns?
and
hot to check dns is working or not ?
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Re: [Ilugc] DNS addresses changes everytime

[Mehul Ved]

On Sun, Dec 6, 2009 at 3:05 PM, Balachandar  wrote:
> Hi guys,
>   I set the newly released google's DNS in my /etc/resolv.conf file.But
> everytime when i restart the system the DNS server IP address is changed by 
> the
> network manager applet.I m using fedora 11 and using BSNL NIC card to connect 
> to
> the internet.Any help.

I don't have access to fedora machine right now to check but you
should find it as follows
1. Right click on NetworkManager applet.
2. Click on Edit Interfaces.
3. Select the interface you connect to.
4. Go to IPv4 settings and manually set DNS there.
See if this works
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Re: [Ilugc] DNS addresses changes everytime

[Roshan George]

On Sun, 2009-12-06 at 09:35 +, Balachandar wrote:
> Hi guys,
>I set the newly released google's DNS in my /etc/resolv.conf file.But 
> everytime when i restart the system the DNS server IP address is changed by 
> the 
> network manager applet.I m using fedora 11 and using BSNL NIC card to connect 
> to 
> the internet.Any help.

You're probably getting an IP address and DNS through dhclient. Add the
following to /etc/dhcp3/dhclient.conf

prepend domain-name-servers 8.8.8.8,8.8.4.4;

-- 
Roshan George 

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[Ilugc] DNS addresses changes everytime

[Balachandar]

Hi guys,
   I set the newly released google's DNS in my /etc/resolv.conf file.But 
everytime when i restart the system the DNS server IP address is changed by the 
network manager applet.I m using fedora 11 and using BSNL NIC card to connect 
to 
the internet.Any help.

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[Ilugc] DNS records and MX querying CGI

[Girish Venkatachalam]

Guys,

I have written a CGI script to figure out the IP address associated
with a domain.

It will also print multiple IP addresses associated with a domain.

Additionally what the script can do is print all the MX records(for
e-mail sending) with
their associated weights and IP addresses.

Take a look yourself:

http://spam-cheetah.com/dns.html

Of course you can download the CGI script and view the syntax
highlighted version
either here:

http://www.spam-cheetah.com/bgquery.html

Or you could go there from the query page.

Hope this is useful. In case you are curious you can read about DNS
from RFC1035.txt
which you can obtain like this:

$ wget ietf.org/rfc/rfc1035.txt

And you can

# perl -MCPAN -e 'install Net::DNS;'

and

$ man Net::DNS

I developed this code from the examples given in the man page.

-Girish

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[Ilugc] DNS - Query

[Ashish Verma]

Hi,

Would request someone to clarify the meaning of delegation-only and
root-delegation-only options. I searched on the net on the isc, redhat etc
websites however could not understand the meaning of "undelegated response"
and therefore am not able to understand the meaning of the above two
options.

Regards,
Ashish
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Re: [Ilugc] dns round robin

[Mehul Ved]

On Mon, May 11, 2009 at 7:59 AM, Ashish Verma  wrote:
> Is it possible for a browser to attempt to make connection on a different IP
> mentioned in DNS for a server, for the purpose of uploading documents, where
> there is already a connection established when logging in.
>
> 10.10.10.10    IN A www.test.com
> 10.10.10.11    IN A www.test.com   //incorrect IP

Possibly add the other IP to /etc/hosts, in case you want to do it on
just a single machine. Or run your internal DNS server with the entry
for this domain, if you use it regularly and on more than a handful of
machines.

-- 

"Now this is a totally brain damaged algorithm. Gag me with a
smurfette." -- P. Buhr, Compute...  -
http://kingsly.net/tmp/fortune.php/1242258859
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[Ilugc] dns round robin

[Ashish Verma]

Hi,

Scenario:

Accessed/logged in a web server using HTTP. Now when attempting to upload a
document, I get "Oops! This Link Appears Broken", which appears to be a
Google message for 404.

Is it possible for a browser to attempt to make connection on a different IP
mentioned in DNS for a server, for the purpose of uploading documents, where
there is already a connection established when logging in.

10.10.10.10IN A www.test.com
10.10.10.11IN A www.test.com   //incorrect IP

Regards,
Ashish
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Re: [Ilugc] DNS IPs

[Kenneth Gonsalves]

On Thursday 18 Sep 2008 12:31:31 pm Girish Venkatachalam wrote:
>  202.67.222.222, 208.67.220.220 are the DNS servers of www.opendns.org

208.67.222.222

-- 
regards
KG
http://lawgon.livejournal.com
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Re: [Ilugc] DNS IPs

[Girish Venkatachalam]

On 11:13:02 Sep 18, indianathan n wrote:
> Dear experts,
>When I use BSNL broad band and Airtel mobile internet
> connection, DNS IPs are different for both Linux and Windows PCs.
> 
> For BSNL GPRS,
> 
> In Windows,
> 202.96.209.133, 202.96.209.5
> In Linux,
> 202.67.222.222, 208.67.220.220
> 
> For Airtel mobile internet,
> 
> In windows,
> 202.56.250.5, 202.56.250.6
> 
> In linux,
> 202.56.240.5, 202.56.230.6
> 
> When i tried to use  windows DNS IPs in linux, Linux OS is not connected and
> the same result for windows.
> 
> What is the reason for this?
> 
> Please explain or give me an link
> 

I cannot explain why this is happening but  I am sure that 

 202.67.222.222, 208.67.220.220 are the DNS servers of www.opendns.org

-Girish
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[Ilugc] DNS IPs

[indianathan n]

Dear experts,
   When I use BSNL broad band and Airtel mobile internet
connection, DNS IPs are different for both Linux and Windows PCs.

For BSNL GPRS,

In Windows,
202.96.209.133, 202.96.209.5
In Linux,
202.67.222.222, 208.67.220.220

For Airtel mobile internet,

In windows,
202.56.250.5, 202.56.250.6

In linux,
202.56.240.5, 202.56.230.6

When i tried to use  windows DNS IPs in linux, Linux OS is not connected and
the same result for windows.

What is the reason for this?

Please explain or give me an link


Padhu,
Ooty.

-- 
Knowledge is power
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[Ilugc] DNS IPs

[indianathan n]

Dear experts,
   When I use BSNL broad band and Airtel mobile internet
connection, DNS IPs are different for both Linux and Windows PCs.

For BSNL GPRS,

In Windows,
202.96.209.133, 202.96.209.5
In Linux,
202.67.222.222, 208.67.220.220

For Airtel mobile internet,

In windows,
202.56.250.5, 202.56.250.6

In linux,
202.56.240.5, 202.56.230.6

When i tried to use  windows DNS IPs in linux, Linux OS is not connected and
the same result for windows.

What is the reason for this?

Please explain or give me an link


Padhu,
Ooty.

-- 
Knowledge is power
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