Client DNS Cache Refresh Interval - [WP]

[WILDPACKET]

Hello:

How often does the DNS cache refresh on a windows XPP/Vista OS?

Is there a way to decrease the referesh interval if possible using a
registry key or GPO?

Advise Please.

Thank you

[Kevin D. Goodknecht Sr. [MVP]]

Read inline please.

In news:A5FF25A8-45ED-4DFC-805C-437439FE7262@microsoft.com,
WILDPACKET <WILDPACKET@discussions.microsoft.com> typed:
> Hello:
>
> How often does the DNS cache refresh on a windows XPP/Vista OS?
>
> Is there a way to decrease the referesh interval if possible using a
> registry key or GPO?
>
> Advise Please.
>
> Thank you

The Maximum TTL for the DNS Client cache on XP is one day, the actual cache
time usually depends on the TTL of the record, reducing the maximum cache
time usually doesn't help a whole lot because the Client record gets the
same TTL as the Server. So reducing the client cache time only increases the
number of times it has to go back to the server, to get the same record with
the same TTL.

That said, here is your article:
How to Disable Client-Side DNS Caching in Windows XP and Windows Server
2003: http://support.microsoft.com/kb/318803/en-us


--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This Helps

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[WILDPACKET]

Thank you Kevin for your response.

How will disabling client side cache help me?



"Kevin D. Goodknecht Sr. [MVP]" wrote:

> Read inline please.
>
> In news:A5FF25A8-45ED-4DFC-805C-437439FE7262@microsoft.com,
> WILDPACKET <WILDPACKET@discussions.microsoft.com> typed:
> > Hello:
> >
> > How often does the DNS cache refresh on a windows XPP/Vista OS?
> >
> > Is there a way to decrease the referesh interval if possible using a
> > registry key or GPO?
> >
> > Advise Please.
> >
> > Thank you
>
> The Maximum TTL for the DNS Client cache on XP is one day, the actual cache
> time usually depends on the TTL of the record, reducing the maximum cache
> time usually doesn't help a whole lot because the Client record gets the
> same TTL as the Server. So reducing the client cache time only increases the
> number of times it has to go back to the server, to get the same record with
> the same TTL.
>
> That said, here is your article:
> How to Disable Client-Side DNS Caching in Windows XP and Windows Server
> 2003: http://support.microsoft.com/kb/318803/en-us
>
>
> --
> Best regards,
> Kevin D. Goodknecht Sr. [MVP]
> Hope This Helps
>
> ===================================
> When responding to posts, please "Reply to Group"
> via your newsreader so that others may learn and
> benefit from your issue, to respond directly to
> me remove the nospam. from my email address.
> ===================================
> http://www.lonestaramerica.com/
> http://support.wftx.us/
> http://message.wftx.us/
> ===================================
> Use Outlook Express?... Get OE_Quotefix:
> It will strip signature out and more
> http://home.in.tum.de/~jain/software/oe-quotefix/
> ===================================
> Keep a back up of your OE settings and folders
> with OEBackup:
> http://www.oehelp.com/OEBackup/Default.aspx
> ===================================
>
>
>

[Kevin D. Goodknecht Sr. [MVP]]

Read inline please.

In news:41A4AE49-6AF3-4A59-A885-5D1851E208CF@microsoft.com,
WILDPACKET <WILDPACKET@discussions.microsoft.com> typed:
> Thank you Kevin for your response.
>
> How will disabling client side cache help me?

You asked for the Registry entries to reduce the TTL on the DNS Client cache
(Refresh time), this KB has those entries. For instance, if you want to
reduce the cached Ttl to 10 minutes. Use a MaxCacheTtl value of 600.
You can also set a different value for the Maximum Negative cache (Cached
answers of non-existent domain) set the MaxNegativeCacheTtl to 0, and the
DNS Client cache will not cache Negative responses. Although, if you query
the same DNS server again, if the non-existent domain may be still in its
cache.
All values in these entries are in seconds.


--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This Helps

===================================
When responding to posts, please "Reply to Group"
via your newsreader so that others may learn and
benefit from your issue, to respond directly to
me remove the nospam. from my email address.
===================================
http://www.lonestaramerica.com/
http://support.wftx.us/
http://message.wftx.us/
===================================
Use Outlook Express?... Get OE_Quotefix:
It will strip signature out and more
http://home.in.tum.de/~jain/software/oe-quotefix/
===================================
Keep a back up of your OE settings and folders
with OEBackup:
http://www.oehelp.com/OEBackup/Default.aspx
===================================