Slow internet

  • Thread starter Thread starter G. Mitchell Peterson
  • Start date Start date
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G. Mitchell Peterson

I have two win2k DNS servers. I used to have the AD controller set to
primary and the non AD DNS server set as secondary. When I had it set this
way the internet is incredibly slow. When I set the DNS in DHCP to _just_
the non AD DNS then it seems to go a bit faster. I have both boxes set to
check themselves first, then check an external DNS. Any idea what might be
going on here? It's like the AD server simple doesn't want to look to an
external DNS then forward on the results back to the client machine.

thanks in Advance,
Mitch
 
In
G. Mitchell Peterson said:
I have two win2k DNS servers. I used to have the AD controller set to
primary and the non AD DNS server set as secondary. When I had it
set this way the internet is incredibly slow. When I set the DNS in
DHCP to _just_ the non AD DNS then it seems to go a bit faster. I
have both boxes set to check themselves first, then check an external
DNS. Any idea what might be going on here? It's like the AD server
simple doesn't want to look to an external DNS then forward on the
results back to the client machine.

thanks in Advance,
Mitch
Click to expand...

Have you enabled a forwarder in both DNS servers?
What are their forwarders?
300202 - HOW TO: Configure DNS for Internet Access in Windows 2000
http://support.microsoft.com/?id=300202&FR=1
 
Each internal server has the other internal server in the forwarder list
(which probably is what is causing the delay). I remember that when I had
the external DNS servers in there I was getting errors in the event log.
Something along the lines of this server does not accept forwards. I'll
try it again and see if that helps with speed. Do you just ignore the
errors in the event log then?
 
In
G. Mitchell Peterson said:
Each internal server has the other internal server in the forwarder
list (which probably is what is causing the delay). I remember that
when I had the external DNS servers in there I was getting errors in
the event log. Something along the lines of this server does not
accept forwards. I'll try it again and see if that helps with
speed. Do you just ignore the errors in the event log then?
Click to expand...

You cannot forward to each other this causes a DNS loop that will cause DNS
to fail. Forward only to ISP's DNS.
 
I took those out and set the forwarded to the firewall's DNS cache server.
75% increase in performance. Thanks, you're a life saver.

Mitch
 
In
G. Mitchell Peterson said:
I took those out and set the forwarded to the firewall's DNS cache
server. 75% increase in performance. Thanks, you're a life saver.

Mitch
Click to expand...
Tell you what, set your forwarder to 4.2.2.2. Should be quicker only because
the firewall is not a true server and it's just proxying the request to
anohter external server. Use the one I gave you so it eliminates the
firewall as an extra hop for quicker performance.


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
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