Dns Resolver Cache

Slappy Da Clown · Posted: Fri Mar 17, 2006 6:15 pm Post subject:

Hi All

OK. This is no real big problem ( I think ), but I'd like to know whats up ( maybe learn something new ). Once in a while I loose my DSL connection for whatever reason ( usually high wind days ). When clicking on repair this connection I get the error - Clearing the DNS cache not completed.

OK. So I got to command function & enter "ipconfig/flushdns" & get the error- Could not flush DNS Resolver Cache: Function failed during execution.

Can anyone tell me whats goin on here ?

Dell 8400 ( please Morbius dont rag me about my Dell ), 1gb memory, windows xp home, nvidia 6800 g force.

Be advised that nothing seems to be wrong with my computer. I just want to know for knowledge.

thanx guys

Slappy

goretsky · Posted: Sat Mar 18, 2006 4:07 am Post subject:

Hello,

Have you tried issuing an "IPCONFIG /RELEASE" at a Command Prompt (filename: CMD.EXE) to release the computer's network interface from its DHCP lease, which will disable the network connection, followed by an "IPCONFIG /RENEW" to provide the network interface with new settings? If so, did that make any difference?

Regards,

Aryeh Goretsky

Slappy Da Clown · Posted: Sat Mar 18, 2006 7:04 am Post subject:

Hi Aryeh

No I have not tried that. When the repair gave the error I found the instruction article for flushing the DNS with a Google search .

Following your instruction, would I still need to issue the "flush" command ? If so I assume it would be between RELEASE & RENEW.

Slappy

BudDurland · Joined: Dec 05, 2002 Posts: 522

I'd be imclined to simply disable the DNS client service. It has a bad habit of ignoring refresh requests, TTLs, etc. Disabling the DNS service simply makes the TCP stack query the configured DNS servers directly, rather than placing a buffer between your application and DNS. I disable DNS on all the computers at work.

Caution: If you are on a network using Microsoft's Active Directory, Do Not disable the DNS client service. Microsoft engineered in some exetensions to DNS that require the windows DNS client. Disabling it in an AD environment will probably prevent you from logging in, or finding network services.

Morbius · Joined: Sep 05, 2005 Posts: 1712

Slappy,
Clowns are authorized to use rediculous things.....like D*** computers. :harhar:
It's just part of the act. :harhar: :laugh: :laugh: :laugh: (I'm laughing wit ya, dude)

Slappy Da Clown · Posted: Mon Mar 20, 2006 8:30 am Post subject:

Hi Guys

Careful here, people are actually learing from you all. Potentially dangerous.

OK, heres what I've discovered. My DNS service is set to manual. Any time I've checked it , its stopped. So, apparently Windows hasnt seen any use for it on my machine ( its only me no network ).
So, now , my question would be. Do you think that if it started the service that would enable the machine to "flush the Resolver cache", thereby allowing the repair of the network connection that started the whole question ?

Again please remember this is a quest for knowledge, my computer ( at least that I'm aware of ) is not having any issues. I just run across this when attempting to repair the network connection one day.

And YES Morbius Clowns are allowed to do lots of things regular people are not. LOL The big red floppy shoes are a big plus.

Thanx all
Slappy

micker377 · Joined: May 27, 2005 Posts: 1059

goretsky · Posted: Tue Mar 21, 2006 12:32 am Post subject:

Hello,

You could certainly issue the /FLUSHDNS command between doing the /RELEASE and /RENEW to clear the DNS cache. I'm wondering if your ISP uses a proxy server and is having problems with it, or with their network routing. From past experience, it is fairly rare to have problems flushing a DNS cache in a home broadband connection environment.

Another possibility might be some sort of interference from security software, a malicious program or some application which makes an extensive amount of network connections, such as a web server or peer-to-peer file sharing application.

Regards,

Aryeh Goretsky

Slappy Da Clown · Posted: Sat Mar 25, 2006 7:08 am Post subject:

OK Aryeh

Clowns are learning ! What a concept !

To start we can rule out "a malicious program", but, I do run several programs all the time & some call the mothership quite often. Also antiviri & malware programs run at all times.

That being said.

If I were to make the attempt to do all this again.

A) Should I do it from safe mode with everything turned off & disconnected from network ?

& then the following would apply

Cool

"OK, heres what I've discovered. My DNS service is set to manual. Any time I've checked it , its stopped. So, apparently Windows hasnt seen any use for it on my machine ( its only me no network ).
So, now , my question would be. Do you think that if it started the service that would enable the machine to "flush the Resolver cache", thereby allowing the repair of the network connection that started the whole question ?"

Dont give up guys
If you keep hitting me in the head with a 2x4 it will eventually break & I will learn.

Thanx for the time & lessons all

Slappy

Morbius · Joined: Sep 05, 2005 Posts: 1712

Just a Clown-Like thought....

If I want to totally disable a Service, I would not set it to Manual.
That just means it doesn't start at boot up but will start anytime any program wants to use it.

I think I'd add that to my "Disable" list, along with a dozen or so other P.O.C.'s.
In fact, I already have. :harhar:

Good Luck,
Doc

BudDurland · Joined: Dec 05, 2002 Posts: 522

Just for the record, if you disable or stop the DNS client server, flushing the DNS resolver cache will always fail because there is no resovler cache. Going back to the original post, the error about flushing the cache when 'repairing" a connection will occurr then as well.

If the service is stopped, this is normal behavior and can be ignored. IF you still have trouble looking up hosts, the problem lies with DNS settings on the network (IPCONFIG /ALL to see what DNS servers are configured)

goretsky · Posted: Mon Mar 27, 2006 2:09 am Post subject:

Hello,

You can certainly try starting the service and seeing what happens, however, I suspect the problem may be external to your computer, i.e., a problem at your ISP.

Out of curiosity, are you using a router, or does your DSL modem connect directly into your computer? If the latter, what sort of connection does it use?

Regards,

Aryeh Goretsky

Slappy Da Clown · Posted: Mon Mar 27, 2006 6:26 am Post subject:

Ahhhh

Now we get to the meat. Thanx BudDdurland you have answered my questions. I was thinking this was what was going on all along.

Bud, Aryeh, & Morbius you have all now contributed to the delinquency of a clown now, so if I go out now & take over the world, rmember its all on you.

Thanx for the help guys

Slappy

zlim · Joined: Mar 11, 2005 Posts: 2747

pssst, Slappy, from where I sit looking at the world, the clowns have already taken over. It doesn't matter the country, there are clowns in all and at every level. That's my 2¢ for today. :harhar:

datahome · Joined: Mar 01, 2009 Posts: 1

Hey guys

Its because your dns client doesnt runs. this can be due to a malware prg.

Try this

1. Open a CMD.EXE window.

2. Type the following command and press Enter:

REG ADD HKLM\SYSTEM\CurrentControlSet\Services\Dnscache /V Start /T REG_DWORD /F /D 2

3. Shutdown and restart Windows XP.

Baby_Tux · Joined: Mar 06, 2007 Posts: 1242

<<<deleted my original comment - moot point >>>

Never mind - thread to old as ZLIM posted. (didn't notice at first either)

zlim · Joined: Mar 11, 2005 Posts: 2747

datahome, sort of pointless to respond to a 3 year old thread.
Whatever was wrong three years ago has probably been fixed.

Baby_Tux · Joined: Mar 06, 2007 Posts: 1242

I'm seeing why other forums I "haunt" have rules governing digging up old threads. - Wink

drwho07 · Joined: Nov 29, 2007 Posts: 2238 Location: Central FL, USA

My question is, "Why don't people READ before they post?

The date of the post is at the top of every post.

If it ain't current.....move on! Rolling Eyes

Doc

zlim · Joined: Mar 11, 2005 Posts: 2747

Some people dig up the thread when doing a google search and then just post a solution or say "I have the same problem, what do I do?" without bothering to look at the date.

At other places, when an old thread is resurrected, it is usually locked it so it doesn't rise from the dead again. It takes too long to go through a forum every few weeks and lock threads so it gets done only as needed.

Now if someone would create a forum addon that would lock a thread after a month - that would be a fantastic addon. Razz