To disable the DNS cache permanently in Windows, use the Service Controller tool or the Services tool to set the DNS Client service startup type to Disabled. Note that the name of the Windows DNS Client service may also appear as "Dnscache."
Note The overall performance of the client computer decreases and the network traffic for DNS queries increases if the DNS resolver cache is deactivated.
The DNS Client service optimizes the performance of DNS name resolution by storing previously resolved names in memory. If the DNS Client service is turned off, the computer can still resolve DNS names by using the network's DNS servers.
When the Windows resolver receives a positive or negative response to a query, it adds that positive or negative response to its cache, and as a result, creates a DNS resource record. The resolver always checks the cache before querying any DNS server. If a DNS resource record is in the cache, the resolver uses the record from the cache instead of querying a server. This behavior expedites queries and decreases network traffic for DNS queries.
You can use the Ipconfig tool to view and to flush the DNS resolver cache. To view the DNS resolver cache, type ipconfig /displaydns at a command prompt. Ipconfig displays the contents of the DNS resolver cache, including the DNS resource records that are preloaded from the Hosts file and any recently queried names that were resolved by the system. After a certain time period, the resolver discards the record from the cache. The time period is specified in the Time to Live (TTL) associated with the DNS resource record. You can also flush the cache manually. After you flush the cache, the computer must query DNS servers again for any DNS resource records previously resolved by the computer. To delete the entries in the DNS resolver cache, type ipconfig /flushdns at a command prompt.
The TTL for positive responses is the lesser of the following values:
* The number of seconds specified in the query response the resolver received
* The value of the MaxCacheTtl registry setting.
* The default TTL for positive responses is 86,400 seconds (1 day).
* The TTL for negative responses is the number of seconds specified in the MaxNegativeCacheTtl registry setting.
* The default TTL for negative responses is 900 seconds (15 minutes).
If you do not want negative responses to be cached, set the MaxNegativeCacheTtl registry setting to 0.
To set the caching time on a client computer:
1. Start Registry Editor (Regedit.exe).
2. Locate and then click the following key in the registry:
3. On the Edit menu, point to New , click DWORD Value, and then add the following registry values:
Value name: MaxCacheTtl
Data type: REG_DWORD
Default value: 86400 seconds
Value data: If you lower the Maximum TTL value in the client's DNS cache to 1 second, this gives the appearance that the client-side DNS cache has been disabled.
Value name: MaxNegativeCacheTtl
Data type: REG_DWORD
Default: 900 seconds
Value data: Set the value to 0 if you do not want negative responses to be cached.
4. Type the value that you want to use, and then click OK.
5. Quit Registry Editor.
I am trying to dupllicate the above in Mint.
13 Xfce, Win XP, GA-MA785GM-US2h, Athlon II X2 240, 4G mem, OCZ SSD, WD 230G, nVidia 210
13 Xfce, Win XP, N68C-5, Athlon II X2 255, 4G mem, OCZ SSD, WD 120G, nVidia 7025
13 Xfce, Win XP, N68C-5, Athlon II X2 250, 4G mem, OCZ SSD, WD 1T, nVidia 7025