[Solved] Strange Domain Names Cache Problem

[donmartio]

Hello again there,

i got a strange problem since some time.
Every time i start my machine and try to do some networking i got randomly mixed up domain->ip resolution.

For example, if i want to go to www.olympia.de i get www.php.net or if i ping www.gototal.de
i get response from google and so on.

At first i thought that the problem is by my provider. But i tested the hole thing with an other machine
here which is plugged in the same router and there every thing is ok.

The Problem disappeared after 3-10 Minutes, so i thought, that something on Gentoo is caching things and is mixed up somehow.

Anybody out there with a hint where to search?

Greetings don Martio
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[kands]

Are you running a local dns daemon like Bind or djbdns?
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[donmartio]

Hello,

thanks for the reply, and no i am not running anythin like that.
For some reason that i have forgotten, i have installed nscd, but it's not running.

Any other ideas?

Greetings
DonMartio
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Always code as if the person who ends up maintaining your code will be a violent psychopath who knows where you live.

[kands]

If you're not using nscd I would unemerge it just to remove it as a possible source of the problem. If you're seeing the same or similar cached responses each time your box might actually be using the nscd cache.

Hopefully that works. If not we'll look for other options.
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Have you broken your spoke today?

[donmartio]

Ok,

it seems, that i can't unmerge nscd, because it's not a package (anymore???).
This is strange because i thought, that i've emerged it for some reason a time ago. But no i found it in the file folder
of the sys-libs/glibc package.

I tested a little bit and i think something realy weird is up on my system.

The domains are mixed up randomly. I rebooted it several times and after every reboot some other
resolution does not match. Every mixed up domain is a domain i visited before (for example de3.php.net and www.olympia.de).

Is there any tool which i can use, to determine where the DN-Resolution comes from?

I'm realy confused.

Greetings
DonMartio
_________________
Always code as if the person who ends up maintaining your code will be a violent psychopath who knows where you live.

[kands]

Try emerging nscd again and then unmerge it right away.

then emerge bind-tools. Once that is done you can use dig to check name resolution against specific name servers or using the dns resolver on the client machine.

dig man page: http://www.stopspam.org/usenet/mmf/man/dig.html
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http://www.brokenspoke.ca
Have you broken your spoke today?

[donmartio]

Hey kands,

thanks for the reply.

The problem is, that i can't emerge or umerge nscd. It's not availabe as ebuild.

I will try the tip with the bind-tools.

May i found the reason.

Thanks again.
DonMartio
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Always code as if the person who ends up maintaining your code will be a violent psychopath who knows where you live.

[kands]

Ok good luck.

You coudl also try running a find for nscd from the root and remove the files that are left from the nscd emerge???
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Have you broken your spoke today?

[donmartio]

So finally i solved the problem, by changing the dns on my machine.

For some reason the error only appears if i use my DSL-Router as DNS (it's strange because the same
setup don't make any problems on another mashine in the same network).

With the DNS which was set on my router the strange behaviour disappeared.

I don't fully understand why, but it works.

Thanks for the help.

Greetings
DonMartio
_________________
Always code as if the person who ends up maintaining your code will be a violent psychopath who knows where you live.