Cannot Flush DNS

Posting Whiz in Training

220 posts since Sep 2004

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Hi Paddy

I have been having exactly the same problem. Did you managed to resolve your problem?

regards
Shane

shanebrown

Newbie Poster

3 posts since Aug 2006

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Sorry man, I haven't been able to fix it.

If anyone else on the forum would like to pitch in, Shane and I would be very grateful! :)

Posting Whiz in Training

220 posts since Sep 2004

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What address have you for DNS. You said you have router, is that an ADSL Router?

If so, try setting the IP to the Router IP, or loopback address 127.0.0.1

GL, David

Practically a Master Poster

678 posts since Feb 2005

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Hello Marty ;)

Yes, it is an ADSL router. I have set up a static IP address for the purposes of port forwarding, although my actual WAN IP is dynamic.

Now, when you say that I should set the IP to match the router's IP, which IP do you mean? Do you mean that I go into the internet connection settings and then into the "Intenet Protocol" bit, where the IP, Subnet Mask and Default Gateway settings are? If so, I've already altered those entries for the port forwarding static IP thingy...

I hadn't knowingly changed any settings prior to this problem...it was working fine last month, and then bam, it screwed up :(

Cheers for the reply, I was beginning to lose hope ;) hehehehe

Posting Whiz in Training

220 posts since Sep 2004

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Actually on the problematic PC. Yeah, on LAN or WIFI Connection, go to the properties of the TCP/IP, and add it there, under IP, Subnet, Gateway.

Of course, make sure you remember your old settings. It should be worth trying both the Routers IP Address, (which should be the default gateway anyway) and loopback address (127.0.0.1). You can actually add both, or one at a time, and leave an old address there.

I just thought that maybe your ISP had problems with it's DNS, or closed it down, ... You can ping the address to find out if it is there at all.

Practically a Master Poster

678 posts since Feb 2005

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I pinged my ISP's DNS address (I'm not sure if I did it right - I went into CMD, then typed "ping 158.152.1.58") It sent 4 packets, received 4 packets, and lost none. I'm assuming that means everything is alright at my ISP's end.

Currently, my Internet Protocol (TCP/IP) settings are as follows:

IP address: 10.0.0.11 (This is my computer's address as assigned in the router, for port forwarding etc. The other computer connected to the router uses the 10.0.0.8 address).

Subnet mask: 255.0.0.0 (This was set automatically when the other vlaues were set, if I remember correctly)

Default gateway: 10.0.0.2 (This is the router's address)

Below that are the DNS values:

Primary DNS server: 158.152.1.58 (I got this directly from my ISP's info page)

Alternate DNS server: 158.152.1.43 (Same as above)

Like I said, these settings worked fine up until a month ago, when the problems began. They haven't been changed or anything.

Maybe it's a problem with the router itself. I've always had a little bit of trouble setting it up, because I have no idea who manufactured it, and therefore can't find any specific documentation for it (see this thread and this thread ). No documentation came with it either, other than instructions on how to turn it on. I'm gonna get a new one at some point - one with a 5,000 page manual! Anyway...

Any ideas?

Thanks for your time mate, much appreciated.

P.S I just checked the other computer in my network, to see if it can flush the DNS. It can, so I guess it's not the router that's casuing the problem. The other computer is set up exactly like mine (except for its IP, which is 10.0.0.8 whereas mine is 10.0.0.11). The only other difference is that I am using Windows XP Professional SP2, and the other PC is using Windows XP Media Centre SP2.

The plot thickens!

Posting Whiz in Training

220 posts since Sep 2004

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Show Comments

I apologies, looks like I have lead you on a merry ride, I should have just searched EE to start with.

Disable the firewall in Xp (done in control panel)
then give it a try,
(ipconfig /flushdns)
if it doesn't work...
. boot to safe mode with network support
. then try your ipconfig /flushdns

That sorted someone else out with the same problem. Hope this helps.

Sorry, David

Practically a Master Poster

678 posts since Feb 2005

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Hehehe no worries ;)

The Windows Firewall is disabled - I never use it. I booted into Safe Mode (with Network support; it wouldn't let me access the ipconfig function with a minimal "Safe Mode" boot). I received the same error as I do when not in Safe Mode:

"Could not flush the DNS Resolver Cache: Function failed during execution."

I'm just about out of ideas haha. Well, maybe a clean install of the OS, but I'm in no mood for that right now! :p

I use the "Comodo Personal Firewall", if that matters. I don't think it does, because I shut it down, and then tried the DNS flush again, but received the same error. Plus it didn't load in Safe Mode anyway.

Watcha reckon?

EDIT: Could it be my anti-virus software? I use Avast! Anti-Virus. Although I did disable network protection for a while. It didn't help the problem.

Posting Whiz in Training

220 posts since Sep 2004

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I'm starting to think this is a connection problem, apparently rebooting the PC would Flush the DNS anyway.

Is this connected via WiFi. If so, make sure you have WEP Security enabled. If this PC is WiFi, and the other is through a LAN cable, could you try the fault PC using the Working PC connection. If they are both cabled, try swapping cables. If they are both Wifi, try using a Lan cable with the Fault PC.

Could you provide the following information.

If you still have problems, please provide;

Router model - ..................
Working PC Connection - ......................
Fault PC Connection - .....................

I'm sorry I haven't found a good solution so far, but still think it's out there somewhere, Regards, Dave

Practically a Master Poster

678 posts since Feb 2005

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I reinstalled Windows yesterday, and that solved the problem. At least now we know it was a problem with the OS rather than the router (the router's configuration hasn't changed).

Thanks for your help guys :)

Posting Whiz in Training

220 posts since Sep 2004

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[quote=Paddy;251571]I reinstalled Windows yesterday, and that solved the problem. At least now we know it was a problem with the OS rather than the router (the router's configuration hasn't changed).

hello

i had the same problem and i managed to solve the problem....

in the comand prompt enter....

netsh winsock reset

hope this will help u guys in the future

Goho

Newbie Poster

1 post since Dec 2006

Reputation Points: 10

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Hi Paddy

My Pennies worth.

XP seems to have a problem when changing IP addresses. If you change one you need to change the other..... Meaning that if your computer name is paddy and you change IP settings you must also alter your computer name. XP remmebers the old name and who it was assigned to.

So in conclusion if you change your IP change computer name as well

Change user name of Paddy to Paddy1 and i think this would have saved you reinstalling the OS.

Darren
South Africa

xcellpro6

Junior Poster

138 posts since Nov 2006

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I'll remember this advice guys, thanks for taking the time to reply. Fortunately I'm not having any problems as of late :D

Cheers!

Posting Whiz in Training

220 posts since Sep 2004

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Solved Threads: 3

Hi there, I know this thread is old now but...

Most likely cause of being unable to flushdns is that the dns service is not actually started.

Goto Start/Run. Type services.msc then hit OK. Check down the list of services and see if DNS Client is running. If its not you know what to do :P

kafiend

Newbie Poster

1 post since May 2007

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I apologies, looks like I have lead you on a merry ride, I should have just searched EE to start with. Disable the firewall in Xp (done in control panel) then give it a try, (ipconfig /flushdns) if it doesn't work... . boot to safe mode with network support . then try your ipconfig /flushdns That sorted someone else out with the same problem. Hope this helps. Sorry, David

Just some clarification on this posting..... This needs to be executed via a command line Start->Run->cmd->enter

At the dos window type ipconfig /flushdns then to register your dns type ipconfig /registerdns. This does not need to be executed via safe mode.

zelkea

Posting Whiz

328 posts since Jul 2006

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reading all of the above is deja vu for me. i am still reinstalling the lot because of the dns problem. i tried everything i could think of, everything everyone in the world couyld think of and some things noone thought of. nada. i even contacted my inet server, three times and had those unqualified peeps think of things. i also eliminated all hardware (lan card, system drive, cables, phone jacks (for pete's sake), accounts etc. also did restore, flush, blush and stopped short of Crush. eliminated the drive with cloned hd of problem drive....worked fine! determined it was definitely the system drive/installation/xppro. couldn't fix it so now i'm reinflinkingstalling all.
that's not a lot of help, but at least it may point you to something in your windows installation for the problem.
good luck.

cheers

espiddly

Newbie Poster

2 posts since May 2007

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