Re: DNS Server Problems - Keep having to restart the DNS service
- From: "Herb Martin" <news@xxxxxxxxxxxxxx>
- Date: Mon, 15 Jan 2007 14:02:24 -0600
"eggedd2k" <chrisnrach17@xxxxxxx> wrote in message
news:1168878929.876294.63130@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
For about a week now during the day our office internet connection goes
down. When it goes down I have to restart the DNS service on our server
which brings the internet back online.
The "Internet" is NOT offline -- if it as you describe -- but rather
there seems to be a name resolution problem. It is very important
to accurately access such problem to be most effective when
troubleshooting them.
Our DNS server has forwarders set-up to send external requests to an
external internet based DNS server. We use NAT to share internet access
throughout the office.
Most likely unrelated.
When the connection goes down we can access websites by using IP
address. This obviously confirms the problem is DNS based.
Seems to do so. It could in theory be NAT issue that only affects the
DNS Server but this is unlikely.
You can test/confrim/disprove this by using a direct NSLookup command
while SPECIFYING the DNS Server IP to use:
nslookup www.google.com DNS.Server.IP.Address
Use this from the DNS server command line, specifying the
IP address of each and ever forwarder you have listed.
(You might also try this from a client, specifying each of the internal
DNS and the forwarder directly so as to look for differences.)
Curious: Do you have "Do Not use Recursion" checked on the
Forwarding tab (most of the time this is a good idea)?
But by changing this you may find you get different results (problem
might become permanent or more frequently if you are totally
dependent on the ISP DNS -- again, this isn't "fix" but a way to
look for more differences.
Whilst restarting the DNS service on our server sorts the problem I do
need to find out what's causing it to go down.
There are no errors or warning messages in the event log.
What version of Windows Server (you posted in Win2000), and what
is your "Service Pack" status -- generally all service packs and hotfixes
should be applied to Windows Servers.
You might also (strongly) consider a REPAIR install (from the original
CDROM) using install to the same directory AND ENSURING you
both receive the prompt to repair and confirm that.
--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com
(phone on web site)
.
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