Re: Win 7 DNS caching

[Jon Paris <jon.paris@xxxxxxxxxxxxxx>]

Thanks Roger - and to other who responded off list.

I'm going to try it but am a little leery because the Win 7 structure doesn't seem to quite map to the XP one. Also most of the web articles I have seen talk of existing settings in the registry related to DNS and those do not appear to be present. 

Maybe over the weekend I'll feel brave enough.  I used to do registry changes and not worry too much but I've not used Windows to any extent for 6 years now so ...


On 2013-09-05, at 11:07 PM, "Roger Vicker, CCP" <rv-tech@xxxxxxxxxx> wrote:

> Jon,
>
> This is from the AutoPatcher tweaks for XP and is called Disable Bad DNS
> Cache. It might still work for Win7
>
> Windows Registry Editor Version 5.00
>
> [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters]
> "NetFailureCacheTime"=dword:00000000
> "NegativeSOACacheTime"=dword:00000000
> "NegativeCacheTime"=dword:00000000
> "MaxCacheTtl"=dword:00003840
> "MaxNegativeCacheTtl"=dword:00000000
>
> [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
> "QueryIpMatching"=dword:00000001
>
>
> Roger Vicker, CCP
>
>
> On 9/5/2013 9:46 AM, Jon Paris arranged the binary bits such that:
> > Anyone know if there is a way (other than via ipconfig /flushdns) to make Win 7 attempt a DNS resolve when a previous attempt resulted in a "not found" condition? 
> >
> > Situation is that if my Win 7 VM attempts a connection while the VPN is down it appears to cache the "not found" scenario and will not attempt a resolve unless I flush the cache - which is a really annoying waste of time.
> >
> > Surely there is a setting somewhere?
> >
> >
> > Jon Paris
> >
> > www.partner400.com
> > www.SystemiDeveloper.com
>
> -- 
> *** Vicker Programming and Service *** Have bits will byte *** www.vicker.com ***
> Eat one live toad the first thing in the morning and nothing worse will happen to you the rest of the day.
>
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Jon Paris

www.partner400.com
www.SystemiDeveloper.com