Clearing Internet cache

[Angel Menendez]

I'm having some webpages redirection problems due to some changes we did in
our network DNS servers. For example, if I try going to usatoday.com it
might take me to yahoo.com. How safe would be to clear the "." cache to
begin building the database again?

Thanks!

 

[hooty]

(I just posted a related question)

Try "dnscmd /clearcache" (dnscmd.exe may be a part of the
support tools)or right-click on the server object in the
DNS MMC and pick "Clear Cache".

I don't know if individual zones have their own cache. I
think that clears everything.

Hopfully that helps

 

[hooty]

dnscmd is for the cache on the server, I expect you would
need to at least be a member of the DnsAdmins group.

Clients have a cache that can be cleared via
"ipconfig /flushdns" on every effected client.
I'm not sure if you must be an Administrator or not, I
would guess so. I think the client's cache has a default
TTL of 1 day for good and 5 minutes for bad.

Yes, each first query for a given hostname gets forwarded
(here is the delay), the answer is returned to the client
and is cached. Any subsiquent queries for that hostname
are then resolved from the cache. As the cache grows,
forwarded DNS traffic reduces.

I just wish I knew the TTL of that cache and the reg key
to set it with.