[gentoo-user] OT - Why won't my computers use their own DNS servers?

[gentoo-user] OT - Why won't my computers use their own DNS servers?

[Michael Sullivan]

On my network I have two computers, camille.espersunited.com
(70.234.122.250) and catherine.espersunited.com (70.234.122.251).  Each
of these two computers runs its own local DNS server.  They do this to
speed up internet access.; at least they used to.  Now I find that
internet access is slow and that they are trying to use each other's DNS
server, which is not what I want.

On camille:

camille ~ # cat /etc/resolv.conf
search espersunited.com 
nameserver 70.24.122.250
nameserver 70.234.122.251
nameserver 70.234.122.248
nameserver 192.168.1.254
domain espersunited.com

camille ~ # dig camille.espersunited.com

; <<>> DiG 9.3.4 <<>> camille.espersunited.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54017
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;camille.espersunited.com.      IN      A

;; ANSWER SECTION:
camille.espersunited.com. 10800 IN      A       70.234.122.250

;; AUTHORITY SECTION:
espersunited.com.       10800   IN      NS      baby.espersunited.com.

;; Query time: 1 msec
;; SERVER: 70.234.122.251#53(70.234.122.251)
;; WHEN: Mon May 14 09:16:28 2007
;; MSG SIZE  rcvd: 77

On catherine:

catherine ~ # cat /etc/resolv.conf
search espersunited.com 
nameserver 70.24.122.251
nameserver 70.234.122.250
nameserver 70.234.122.248
nameserver 192.168.1.254
domain espersunited.com
catherine ~ # dig catherine.espersunited.com

; <<>> DiG 9.3.4 <<>> catherine.espersunited.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49177
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1

;; QUESTION SECTION:
;catherine.espersunited.com.    IN      A

;; ANSWER SECTION:
catherine.espersunited.com. 10800 IN    A       70.234.122.251

;; AUTHORITY SECTION:
espersunited.com.       10800   IN      NS      baby.espersunited.com.

;; ADDITIONAL SECTION:
baby.espersunited.com.  10800   IN      A       70.234.122.248

;; Query time: 0 msec
;; SERVER: 70.234.122.250#53(70.234.122.250)
;; WHEN: Mon May 14 09:17:06 2007
;; MSG SIZE  rcvd: 95

Why is it doing this?  I can post /etc/named/db.espersunited.com if you
think it would help...

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Re: [gentoo-user] OT - Why won't my computers use their own DNS servers?

[Hans-Werner Hilse]

Hi,

On Mon, 14 May 2007 09:18:02 -0500 Michael Sullivan
<michael@espersunited.com> wrote:

> On my network I have two computers, camille.espersunited.com
> (70.234.122.250) and catherine.espersunited.com (70.234.122.251).
> Each of these two computers runs its own local DNS server.  They do
> this to speed up internet access.; at least they used to.  Now I find
> that internet access is slow and that they are trying to use each
> other's DNS server, which is not what I want.

According to resolv.conf(5) you can by default only configure 3 (!)
name servers instead of the four you have.

Also, it doesn't make sense to configure a nameserver to return its own
host name, so I would consider your test case being invalid.

The interesting question would be which name server answers for the case
that you query some other host name (also since you said what you want
those servers to do is caching, not authoritative name services).

Since those are public IPs, I happened to positively check for the
existence of a firewall. Its configuration regarding DNS queries (UDP
_and_ -- always forgotten -- TCP port 53) would be interesting, esp.
the configured allowed IP ranges for source and destination.

-hwh
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Re: [gentoo-user] OT - Why won't my computers use their own DNS servers? [SOLVED]

[Michael Sullivan]

On Mon, 2007-05-14 at 16:58 +0200, Etaoin Shrdlu wrote:
> On Monday 14 May 2007 16:18, Michael Sullivan wrote:
> 
> > On camille:
> >
> > camille ~ # cat /etc/resolv.conf
> > search espersunited.com
> > nameserver 70.24.122.250
>                ^^^^
> 
> Shouldn't this be 70.234.122.250?

That did it.  Thank you!  I wonder how that happened, and why I didn't
see that the addresses didn't line up....?

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Re: [gentoo-user] OT - Why won't my computers use their own DNS servers?

[Arnau Bria]

On Mon, 14 May 2007 09:18:02 -0500
Michael Sullivan wrote:

> On my network I have two computers, camille.espersunited.com
> (70.234.122.250) and catherine.espersunited.com (70.234.122.251).

If IP's are correct:

> On camille:
> 
> camille ~ # cat /etc/resolv.conf
> search espersunited.com 
> nameserver 70.24.122.250 ->>> who is this? Maybe should be 234?
> nameserver 70.234.122.251 --->>>> catherine!
> nameserver 70.234.122.248
> nameserver 192.168.1.254
> domain espersunited.com

same thing for catherine
> 
> On catherine:
> 
> catherine ~ # cat /etc/resolv.conf
> search espersunited.com 
> nameserver 70.24.122.251
> nameserver 70.234.122.250
> nameserver 70.234.122.248
> nameserver 192.168.1.254
> domain espersunited.com
> catherine ~ # dig catherine.espersunited.com

HTH

-- 
Arnau Bria
http://blog.emergetux.net
Bombing for peace is like fucking for virginity
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Re: [gentoo-user] OT - Why won't my computers use their own DNS servers?

[Etaoin Shrdlu]

On Monday 14 May 2007 16:18, Michael Sullivan wrote:

> On camille:
>
> camille ~ # cat /etc/resolv.conf
> search espersunited.com
> nameserver 70.24.122.250
               ^^^^

Shouldn't this be 70.234.122.250?
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Re: [gentoo-user] OT - Why won't my computers use their own DNS servers? [SOLVED]

[Bryan Whitehead]

Why not do this:

nameserver 127.0.0.1

Michael Sullivan wrote:
> On Mon, 2007-05-14 at 16:58 +0200, Etaoin Shrdlu wrote:
>   
>> On Monday 14 May 2007 16:18, Michael Sullivan wrote:
>>
>>     
>>> On camille:
>>>
>>> camille ~ # cat /etc/resolv.conf
>>> search espersunited.com
>>> nameserver 70.24.122.250
>>>       
>>                ^^^^
>>
>> Shouldn't this be 70.234.122.250?
>>     
>
> That did it.  Thank you!  I wonder how that happened, and why I didn't
> see that the addresses didn't line up....?
>
>   

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