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andysnat
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Reg'd: Mon
Posts: 4
Loc: Sedgefield
Domain Name Server Cache Problems
      #126732 - Mon Nov 08 2004 10:23 AM

I could give you the long version, or the short version.

Long Version.

I have a list of favourite links on my website, which I often use myself to read the latest offerings from all the sites I like. Recently, one of them disappeared completely from my browser, i.e. I couldn't click on the link and get to the site, getting a time out error instead. I have asked a number of friends on another forum to try the link, and all managed to see the site without problems, from a number of different countries.

I have sent messages to my ISP's support desk by email, but they have a wonderful new broadband package available, and their reply is as follows:

"We are very sorry, but due to the popularity of tesco broadband we are receiving a very high number of emails."

I have tried Sarcasm, Metaphor, and even Irony (gasp) to get a response out of them, all to no avail.

The owner of the site in question (a computer science student) said that it is a DNS problem, and gave me instructions how to sort out the problem in Windows XP. I use Windows 98. (I'm stingy - I have a PC I bought in 1998 with a PII processor) I'm sure that the site owner would help except that he was in nappies when I started using WIN 98, and I don't think he can help me, and it isn't really his problem.

Could anybody tell me how to clear the DNS cache in WIN 98, bearing in mind my ISP is Tesco? Or is there another problem I'm not aware of.

I suppose you might want to see my site, a blog :

http://sedgefield.blogdrive.com/

and the failed link is the one to neils world :

http://www.neilturner.me.uk/

Could anybody tell me how to clear the DNS cache in WIN 98, bearing in mind my ISP is Tesco?


Short Version

Could anybody tell me how to clear the DNS cache in WIN 98, bearing in mind my ISP is Tesco?


Andy



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andysnat
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Reg'd: Mon
Posts: 4
Loc: Sedgefield
Re: Domain Name Server Cache Problems [Re: andysnat]
      #127311 - Tue Nov 09 2004 02:03 PM

Believe it or not, I got a response out of Tesco, but not before I'd posted all my emails to their support onto my blog, as follows :

"Dear Andy

I can appreciate your frustration in being unable to view a specific web page, and apologise that none of these responses have particularly addressed your specific query - but a 'DNS Flush' is not something for which we have requests. There can be many reasons for websites being temporarily unavailable, most of them not connected with the relatively short link we provide onto the web. There have been no changes or faults in our DNS servers.

Can you confirm please whether you have cleared your browser cache, checked your 'hosts' file for invalid entries and tried to view the websites in different browsers / from different connections?

The advice you have about flushing the cache may refer to a problem with XP, which remembers negative (DNS unable to resolve) entries for a few minutes. This can be a problem when moving and debugging sites.

As long as that negative entry sits in the DNS cache, your PC will continue to give a cannot find server error. By cleaning out your DNS cache, you can fix this problem. Start a 'command' box and type: ipconfig /flushdns. A restart however will do the same thing.

If you are having continuing problems, please see http://www.all-nettools.com/pr.htm

Nettools will shows local proxy settings and other details which may be relevant to connection issues.

http://www.proxynation.org/ may supply you with more relevant information.

I hope this information may help."

I've had a brief look at the two sites in question, but haven't had time to really study. From my own research, the very small amount of info I could find by Googling leads me to believe that the tesco Domain Name Server is the problem, not my cache. (even though I believe that Tesco subcontract their ISP type business to NTL, I still call it the Tesco DNS)

Anybody care to comment?
Andy
My Blog



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greystsModerator
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Reg'd: Thu
Posts: 17735
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Re: Domain Name Server Cache Problems [Re: andysnat]
      #127433 - Tue Nov 09 2004 08:34 PM

I know it sounds stupid, but have you tried deleting the entry in your Favourites and typing the address direct into the address bar? Sometimes URLs get corrupted.


Do you know that we're all in line for succession to the throne? Really?
Well, if forty-eight million, two hundred thousand, seven hundred and one people died I'd be Queen.


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andysnat
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Reg'd: Mon
Posts: 4
Loc: Sedgefield
Re: Domain Name Server Cache Problems [Re: greysts]
      #127588 - Tue Nov 09 2004 11:30 PM

Thanks for that suggestion.

I've actually got an alternative address as well.

The address is actually a link on my blog that I have had up for some time. I've tried a number of ways, and even the RSS feed wont work for me. The IP address has changed and the site became invisible at that time.

I actually managed to get a response out of Tesco, and they gave advice and suggested a couple of forums, (not this one though). I posted everything to my blog for some fun, and I will now await developments.

I'll keep trying though.
Andy
My Blog



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andysnat
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Reg'd: Mon
Posts: 4
Loc: Sedgefield
Re: Domain Name Server Cache Problems [Re: andysnat]
      #131118 - Sat Nov 20 2004 12:42 PM

And still nothing.

Very very frustrating, though I have had a couple of suggestions in other forums.

I can go ot the local library to see the missing site, but Tesco wont let me see it.

If anybody has any suggestions, please let me know. I wonder how much of the internet Tesco have cut me off from?
Andy
My Blog



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Jonny555



Reg'd: Fri
Posts: 5308
Loc: Cheshire, England
Re: Domain Name Server Cache Problems [Re: andysnat]
      #131122 - Sat Nov 20 2004 12:58 PM

Check your HOSTS file.

Make sure that your blog's IP address isn't being blocked. If it is it will be listed with an IP of 127.0.0.1

If it's not listed then add it. i.e. sedgefield.blogdrive.com 216.117.199.234

That is if the blog your referring to is the one in your signature.

I've just noticed you mention the failed site. Add that to your HOSTS file. www.neilturner.me.uk 70.84.250.212


Edited by Jonny555 on 20/11/2004 13:02 (server time).



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Mr_Tom_Ripley
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Reg'd: Wed
Posts: 298
Re: Domain Name Server Cache Problems [Re: Jonny555]
      #131212 - Sat Nov 20 2004 08:18 PM

Try typing the url into google and then hit the link on the results page...this has worked for me in the past, but not always...good luck



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alijb
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Reg'd: Thu
Posts: 11
Re: Domain Name Server Cache Problems [Re: Jonny555]
      #144469 - Thu Dec 30 2004 10:10 PM

I am having exactly the same problems with tesco & got the same email about being busy with broadband.

Did you get sorted Andy & can anyone offer me any help?

How do I check the HOST?

Thank you to anyone who can help


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Insomniac
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Reg'd: Sun
Posts: 1
Re: Domain Name Server Cache Problems [Re: andysnat]
      #153282 - Sun Jan 23 2005 05:08 PM

In situations such as these, your ISP has no real responsibility to make sure every IP is accessable on the net. The same somewhat applies to DNS services, however you do have a somewhat simple option to fix this, when you find a site which you are sure is online, and it appears to be giving you hell, get yourself a Proxy from a nice site like http://www.digitalcybersoft.com/ProxyList/ and chuck it into your browser. This way you are infact using the DNS services of a remote host to perform the request, and besides that you can even lookup a Proxy from a specific country so you could effectively route through a working host in the same area.


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