DNS settings

[David C]

The XP client machines seem to be slower accessing the internet via our 2003
server. I have the client TCP/IP settings to point to the AD server as the
primary DNS IP address. When I go to access the internet, I get "Looking up
www.Google.com" in lower left and there is a delay. The 2nd time I try with
a different www address I get "Waiting for www.dell.com" (for example) and
the page is very slow.

I tested the DSL speed and all is fine with that, but it appears to be a DNS
problem. Am I right? and how can I set client correctly? Thanks.

p.s. I tried adding our outside (ISP) DNS as the secondary on my client and
the initial internet was very fast. But I could not access our SQL server
when I did that until I removed the secondary DNS. Also, we have a firewall
box that is our Gateway.

David

 

[Thee Chicago Wolf]

Re: DNS settings

>The XP client machines seem to be slower accessing the internet via our 2003
>server. I have the client TCP/IP settings to point to the AD server as the
>primary DNS IP address. When I go to access the internet, I get "Looking up
>www.Google.com" in lower left and there is a delay. The 2nd time I try with
>a different www address I get "Waiting for www.dell.com" (for example) and
>the page is very slow.
>
>I tested the DSL speed and all is fine with that, but it appears to be a DNS
>problem. Am I right? and how can I set client correctly? Thanks.
>
>p.s. I tried adding our outside (ISP) DNS as the secondary on my client and
>the initial internet was very fast. But I could not access our SQL server
>when I did that until I removed the secondary DNS. Also, we have a firewall
>box that is our Gateway.

You can do some uber DNS performance tweaking for very optimized speed
on both client and server. Open notepad, past in the following:



Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters]
"MaxNegativeCacheTtl"=dword:00000000
"MaxCacheTtl"=dword:00000e10
"NegativeSOACacheTime"=dword:00000000
"NetFailureCacheTime"=dword:00000000



Save it as dns-tweaks.reg (make sure the extension is not a .txt) so
as to make importing it easy. Double-click dns-tweaks.reg to import.
Reboot for the settings to take effect. Do a before and after, you'll
be amazed.

I use these tweaks on all 500+ clients and a few of my servers and the
response and performance improvement is insane. Give it a shot and let
me know how it goes. If you need to squeeze additional performance, I
can give you some more tips.

- Thee Chicago Wolf

 

[David C]

Re: DNS settings

It only helps when I go back to a page that I was previously on. Also, if I
close my browser then all web pages start up slow again. I think it has
something to do with the DNS on the server, but I didn't change anything
there. I am assuming the "Looking up ...." in lower left of my browser when
I first open the browser means that DNS lookup is slow on the server because
that is my primary DNS IP.

Any other ideas? Thanks.

David
"Thee Chicago Wolf" <.@.> wrote in message
news:q8moa41f6eqn1dg53k0vrv886ngs8pkqqj@4ax.com...
> >The XP client machines seem to be slower accessing the internet via our
> >2003
>>server. I have the client TCP/IP settings to point to the AD server as
>>the
>>primary DNS IP address. When I go to access the internet, I get "Looking
>>up
>>www.Google.com" in lower left and there is a delay. The 2nd time I try
>>with
>>a different www address I get "Waiting for www.dell.com" (for example) and
>>the page is very slow.
>>
>>I tested the DSL speed and all is fine with that, but it appears to be a
>>DNS
>>problem. Am I right? and how can I set client correctly? Thanks.
>>
>>p.s. I tried adding our outside (ISP) DNS as the secondary on my client
>>and
>>the initial internet was very fast. But I could not access our SQL server
>>when I did that until I removed the secondary DNS. Also, we have a
>>firewall
>>box that is our Gateway.
>
> You can do some uber DNS performance tweaking for very optimized speed
> on both client and server. Open notepad, past in the following:
>
>
>
> Windows Registry Editor Version 5.00
>
> [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters]
> "MaxNegativeCacheTtl"=dword:00000000
> "MaxCacheTtl"=dword:00000e10
> "NegativeSOACacheTime"=dword:00000000
> "NetFailureCacheTime"=dword:00000000
>
>
>
> Save it as dns-tweaks.reg (make sure the extension is not a .txt) so
> as to make importing it easy. Double-click dns-tweaks.reg to import.
> Reboot for the settings to take effect. Do a before and after, you'll
> be amazed.
>
> I use these tweaks on all 500+ clients and a few of my servers and the
> response and performance improvement is insane. Give it a shot and let
> me know how it goes. If you need to squeeze additional performance, I
> can give you some more tips.
>
> - Thee Chicago Wolf

 

[Thee Chicago Wolf]

Re: DNS settings

>It only helps when I go back to a page that I was previously on. Also, if I
>close my browser then all web pages start up slow again. I think it has
>something to do with the DNS on the server, but I didn't change anything
>there. I am assuming the "Looking up ...." in lower left of my browser when
>I first open the browser means that DNS lookup is slow on the server because
>that is my primary DNS IP.
>
>Any other ideas? Thanks.

It definitely won't hurt to apply it to the server as it reversible.
Since the server is doing DNS, you should do it there. The settings
are much more performance tuned than default XP or Server 2003
settings could be. I'd be more surprise if you applied the tweaks to
the server and it was still slow in responding, then I would say it is
something else.

If the server is performing DNS duties for the clients, then for sure
it is caching the positive and negative DNS hits to outside sites but,
as you say, the initial is quick but afterwards it gets slow. This
server is on SP2 correct? You could also try applying the
QueryIpAddress tweak as well but it's more of a poorman's version of
the recent DNS update to remedy the DNS poisoning vulnerability.

Now you said this was a DSL connection, yes? Is this a DSL modem or
DSL router? If router, is it's firewall on or off? Is the server
running a firewall?

Do the tweak on the server as well, reboot, and see what happens.
Also, the NIC driver on the server is as current as it could be, yes?

- Thee Chicago Wolf

 

[Hikmat Kanaan]

Re: DNS settings

Hi,
IS you DNS server using forwarding to the ISP DNS or isn't trying to resolve
the names it's self.
My advise it should be configured to forward DNS lookup to ISP DNS server

"David C" <dlchase@lifetimeinc.com> wrote in message
news:#SnUDtuAJHA.524@TK2MSFTNGP06.phx.gbl...
> The XP client machines seem to be slower accessing the internet via our
> 2003 server. I have the client TCP/IP settings to point to the AD server
> as the primary DNS IP address. When I go to access the internet, I get
> "Looking up www.Google.com" in lower left and there is a delay. The 2nd
> time I try with a different www address I get "Waiting for www.dell.com"
> (for example) and the page is very slow.
>
> I tested the DSL speed and all is fine with that, but it appears to be a
> DNS problem. Am I right? and how can I set client correctly? Thanks.
>
> p.s. I tried adding our outside (ISP) DNS as the secondary on my client
> and the initial internet was very fast. But I could not access our SQL
> server when I did that until I removed the secondary DNS. Also, we have a
> firewall box that is our Gateway.
>
> David
>

 

[Meinolf Weber]

Re: DNS settings

Hello David,

Did you setup the FORWARDERS on the DC? Please post an unedited ipconfig
/all from client and DC.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> The XP client machines seem to be slower accessing the internet via
> our 2003 server. I have the client TCP/IP settings to point to the AD
> server as the primary DNS IP address. When I go to access the
> internet, I get "Looking up www.Google.com" in lower left and there is
> a delay. The 2nd time I try with a different www address I get
> "Waiting for www.dell.com" (for example) and the page is very slow.
>
> I tested the DSL speed and all is fine with that, but it appears to be
> a DNS problem. Am I right? and how can I set client correctly?
> Thanks.
>
> p.s. I tried adding our outside (ISP) DNS as the secondary on my
> client and the initial internet was very fast. But I could not access
> our SQL server when I did that until I removed the secondary DNS.
> Also, we have a firewall box that is our Gateway.
>
> David
>

 

[David C]

Re: DNS settings

Where in forward lookup would I add it? As a "New Host"? Thanks.

David
"Hikmat Kanaan" <hikmetsalim@hotmail.com> wrote in message
news:10CA3B30-8DB3-4FBF-B193-CE3487D399BC@microsoft.com...
> Hi,
> IS you DNS server using forwarding to the ISP DNS or isn't trying to
> resolve the names it's self.
> My advise it should be configured to forward DNS lookup to ISP DNS server
>
> "David C" <dlchase@lifetimeinc.com> wrote in message
> news:#SnUDtuAJHA.524@TK2MSFTNGP06.phx.gbl...
>> The XP client machines seem to be slower accessing the internet via our
>> 2003 server. I have the client TCP/IP settings to point to the AD server
>> as the primary DNS IP address. When I go to access the internet, I get
>> "Looking up www.Google.com" in lower left and there is a delay. The 2nd
>> time I try with a different www address I get "Waiting for www.dell.com"
>> (for example) and the page is very slow.
>>
>> I tested the DSL speed and all is fine with that, but it appears to be a
>> DNS problem. Am I right? and how can I set client correctly? Thanks.
>>
>> p.s. I tried adding our outside (ISP) DNS as the secondary on my client
>> and the initial internet was very fast. But I could not access our SQL
>> server when I did that until I removed the secondary DNS. Also, we have
>> a firewall box that is our Gateway.
>>
>> David
>>

 

[David C]

Re: DNS settings

I looked at the ipconfig and it showed an old DNS IP from our previous ISP.
I changed it on the DHCP setttings on the server and it seemed to improve it
greatly. Thank you.

David
"Meinolf Weber" <meiweb(nospam)@gmx.de> wrote in message
news:ff16fb664b4e8cad17e16a480ac@msnews.microsoft.com...
> Hello David,
>
> Did you setup the FORWARDERS on the DC? Please post an unedited ipconfig
> /all from client and DC.
>
> Best regards
>
> Meinolf Weber
> Disclaimer: This posting is provided "AS IS" with no warranties, and
> confers no rights.
> ** Please do NOT email, only reply to Newsgroups
> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>
>> The XP client machines seem to be slower accessing the internet via
>> our 2003 server. I have the client TCP/IP settings to point to the AD
>> server as the primary DNS IP address. When I go to access the
>> internet, I get "Looking up www.Google.com" in lower left and there is
>> a delay. The 2nd time I try with a different www address I get
>> "Waiting for www.dell.com" (for example) and the page is very slow.
>>
>> I tested the DSL speed and all is fine with that, but it appears to be
>> a DNS problem. Am I right? and how can I set client correctly?
>> Thanks.
>>
>> p.s. I tried adding our outside (ISP) DNS as the secondary on my
>> client and the initial internet was very fast. But I could not access
>> our SQL server when I did that until I removed the secondary DNS.
>> Also, we have a firewall box that is our Gateway.
>>
>> David
>>
>
>

 

[Meinolf Weber]

Re: DNS settings

Hello David,

Make sure that all machines use only the domain internal DNS. To configure
the FORWARDER got to DNS management console, rightclick the server, open
properties and choose the forwarders tab.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> I looked at the ipconfig and it showed an old DNS IP from our previous
> ISP. I changed it on the DHCP setttings on the server and it seemed to
> improve it greatly. Thank you.
>
> David
> "Meinolf Weber" <meiweb(nospam)@gmx.de> wrote in message
> news:ff16fb664b4e8cad17e16a480ac@msnews.microsoft.com...
>> Hello David,
>>
>> Did you setup the FORWARDERS on the DC? Please post an unedited
>> ipconfig /all from client and DC.
>>
>> Best regards
>>
>> Meinolf Weber
>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>> confers no rights.
>> ** Please do NOT email, only reply to Newsgroups
>> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>>> The XP client machines seem to be slower accessing the internet via
>>> our 2003 server. I have the client TCP/IP settings to point to the
>>> AD server as the primary DNS IP address. When I go to access the
>>> internet, I get "Looking up www.Google.com" in lower left and there
>>> is a delay. The 2nd time I try with a different www address I get
>>> "Waiting for www.dell.com" (for example) and the page is very slow.
>>>
>>> I tested the DSL speed and all is fine with that, but it appears to
>>> be a DNS problem. Am I right? and how can I set client correctly?
>>> Thanks.
>>>
>>> p.s. I tried adding our outside (ISP) DNS as the secondary on my
>>> client and the initial internet was very fast. But I could not
>>> access our SQL server when I did that until I removed the secondary
>>> DNS. Also, we have a firewall box that is our Gateway.
>>>
>>> David
>>>

 

[David C]

Re: DNS settings

Meinolf,
Do I even need the ISP's DNS in our internal DNS settings? I already have
them designated in the firewall box (Symantec Security appliance) and the
servers have that IP set as the Gateway IP address. Thanks.

David
"Meinolf Weber" <meiweb(nospam)@gmx.de> wrote in message
news:ff16fb664d228cad2468baebbd5@msnews.microsoft.com...
> Hello David,
>
> Make sure that all machines use only the domain internal DNS. To configure
> the FORWARDER got to DNS management console, rightclick the server, open
> properties and choose the forwarders tab.
>
> Best regards
>
> Meinolf Weber
> Disclaimer: This posting is provided "AS IS" with no warranties, and
> confers no rights.
> ** Please do NOT email, only reply to Newsgroups
> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>
>> I looked at the ipconfig and it showed an old DNS IP from our previous
>> ISP. I changed it on the DHCP setttings on the server and it seemed to
>> improve it greatly. Thank you.
>>
>> David
>> "Meinolf Weber" <meiweb(nospam)@gmx.de> wrote in message
>> news:ff16fb664b4e8cad17e16a480ac@msnews.microsoft.com...
>>> Hello David,
>>>
>>> Did you setup the FORWARDERS on the DC? Please post an unedited
>>> ipconfig /all from client and DC.
>>>
>>> Best regards
>>>
>>> Meinolf Weber
>>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>>> confers no rights.
>>> ** Please do NOT email, only reply to Newsgroups
>>> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>>>> The XP client machines seem to be slower accessing the internet via
>>>> our 2003 server. I have the client TCP/IP settings to point to the
>>>> AD server as the primary DNS IP address. When I go to access the
>>>> internet, I get "Looking up www.Google.com" in lower left and there
>>>> is a delay. The 2nd time I try with a different www address I get
>>>> "Waiting for www.dell.com" (for example) and the page is very slow.
>>>>
>>>> I tested the DSL speed and all is fine with that, but it appears to
>>>> be a DNS problem. Am I right? and how can I set client correctly?
>>>> Thanks.
>>>>
>>>> p.s. I tried adding our outside (ISP) DNS as the secondary on my
>>>> client and the initial internet was very fast. But I could not
>>>> access our SQL server when I did that until I removed the secondary
>>>> DNS. Also, we have a firewall box that is our Gateway.
>>>>
>>>> David
>>>>
>
>

 

[Meinolf Weber]

Re: DNS settings

Hello David,

To forward DNS request the DNS server needs to know a DNS server outside
your network. I think the router/firewall will not be enough. But to be sure
just test it, once with forwarder and once without.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> Meinolf,
> Do I even need the ISP's DNS in our internal DNS settings? I already
> have
> them designated in the firewall box (Symantec Security appliance) and
> the
> servers have that IP set as the Gateway IP address. Thanks.
> David
> "Meinolf Weber" <meiweb(nospam)@gmx.de> wrote in message
> news:ff16fb664d228cad2468baebbd5@msnews.microsoft.com...
>> Hello David,
>>
>> Make sure that all machines use only the domain internal DNS. To
>> configure the FORWARDER got to DNS management console, rightclick the
>> server, open properties and choose the forwarders tab.
>>
>> Best regards
>>
>> Meinolf Weber
>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>> confers no rights.
>> ** Please do NOT email, only reply to Newsgroups
>> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>>> I looked at the ipconfig and it showed an old DNS IP from our
>>> previous ISP. I changed it on the DHCP setttings on the server and
>>> it seemed to improve it greatly. Thank you.
>>>
>>> David
>>> "Meinolf Weber" <meiweb(nospam)@gmx.de> wrote in message
>>> news:ff16fb664b4e8cad17e16a480ac@msnews.microsoft.com...
>>>> Hello David,
>>>>
>>>> Did you setup the FORWARDERS on the DC? Please post an unedited
>>>> ipconfig /all from client and DC.
>>>>
>>>> Best regards
>>>>
>>>> Meinolf Weber
>>>> Disclaimer: This posting is provided "AS IS" with no warranties,
>>>> and
>>>> confers no rights.
>>>> ** Please do NOT email, only reply to Newsgroups
>>>> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>>>>> The XP client machines seem to be slower accessing the internet
>>>>> via our 2003 server. I have the client TCP/IP settings to point
>>>>> to the AD server as the primary DNS IP address. When I go to
>>>>> access the internet, I get "Looking up www.Google.com" in lower
>>>>> left and there is a delay. The 2nd time I try with a different
>>>>> www address I get "Waiting for www.dell.com" (for example) and the
>>>>> page is very slow.
>>>>>
>>>>> I tested the DSL speed and all is fine with that, but it appears
>>>>> to be a DNS problem. Am I right? and how can I set client
>>>>> correctly? Thanks.
>>>>>
>>>>> p.s. I tried adding our outside (ISP) DNS as the secondary on my
>>>>> client and the initial internet was very fast. But I could not
>>>>> access our SQL server when I did that until I removed the
>>>>> secondary DNS. Also, we have a firewall box that is our Gateway.
>>>>>
>>>>> David
>>>>>

 

[Hikmat Kanaan]

Re: DNS settings

you Can find the forwarders tab at the properties of DNS server
Start DNS manger --> right click server name --> select Forwards Tab --> add
ISP DNS IP addrss

"David C" <dlchase@lifetimeinc.com> wrote in message
news:OWlfTh6AJHA.4172@TK2MSFTNGP03.phx.gbl...
> Where in forward lookup would I add it? As a "New Host"? Thanks.
>
> David
> "Hikmat Kanaan" <hikmetsalim@hotmail.com> wrote in message
> news:10CA3B30-8DB3-4FBF-B193-CE3487D399BC@microsoft.com...
>> Hi,
>> IS you DNS server using forwarding to the ISP DNS or isn't trying to
>> resolve the names it's self.
>> My advise it should be configured to forward DNS lookup to ISP DNS server
>>
>> "David C" <dlchase@lifetimeinc.com> wrote in message
>> news:#SnUDtuAJHA.524@TK2MSFTNGP06.phx.gbl...
>>> The XP client machines seem to be slower accessing the internet via our
>>> 2003 server. I have the client TCP/IP settings to point to the AD
>>> server as the primary DNS IP address. When I go to access the internet,
>>> I get "Looking up www.Google.com" in lower left and there is a delay.
>>> The 2nd time I try with a different www address I get "Waiting for
>>> www.dell.com" (for example) and the page is very slow.
>>>
>>> I tested the DSL speed and all is fine with that, but it appears to be a
>>> DNS problem. Am I right? and how can I set client correctly? Thanks.
>>>
>>> p.s. I tried adding our outside (ISP) DNS as the secondary on my client
>>> and the initial internet was very fast. But I could not access our SQL
>>> server when I did that until I removed the secondary DNS. Also, we have
>>> a firewall box that is our Gateway.
>>>
>>> David
>>>
>
>

 

[David C]

Re: DNS settings

Works perfect. Thank you.
The forward DNS that was in there was defunct. Once I put our new one in
things seem to be back to normal.

David
"Meinolf Weber" <meiweb(nospam)@gmx.de> wrote in message
news:ff16fb664de98cad29a125ad069@msnews.microsoft.com...
> Hello David,
>
> To forward DNS request the DNS server needs to know a DNS server outside
> your network. I think the router/firewall will not be enough. But to be
> sure just test it, once with forwarder and once without.
>
> Best regards
>
> Meinolf Weber
> Disclaimer: This posting is provided "AS IS" with no warranties, and
> confers no rights.
> ** Please do NOT email, only reply to Newsgroups
> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>
>> Meinolf,
>> Do I even need the ISP's DNS in our internal DNS settings? I already
>> have
>> them designated in the firewall box (Symantec Security appliance) and
>> the
>> servers have that IP set as the Gateway IP address. Thanks.
>> David
>> "Meinolf Weber" <meiweb(nospam)@gmx.de> wrote in message
>> news:ff16fb664d228cad2468baebbd5@msnews.microsoft.com...
>>> Hello David,
>>>
>>> Make sure that all machines use only the domain internal DNS. To
>>> configure the FORWARDER got to DNS management console, rightclick the
>>> server, open properties and choose the forwarders tab.
>>>
>>> Best regards
>>>
>>> Meinolf Weber
>>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>>> confers no rights.
>>> ** Please do NOT email, only reply to Newsgroups
>>> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>>>> I looked at the ipconfig and it showed an old DNS IP from our
>>>> previous ISP. I changed it on the DHCP setttings on the server and
>>>> it seemed to improve it greatly. Thank you.
>>>>
>>>> David
>>>> "Meinolf Weber" <meiweb(nospam)@gmx.de> wrote in message
>>>> news:ff16fb664b4e8cad17e16a480ac@msnews.microsoft.com...
>>>>> Hello David,
>>>>>
>>>>> Did you setup the FORWARDERS on the DC? Please post an unedited
>>>>> ipconfig /all from client and DC.
>>>>>
>>>>> Best regards
>>>>>
>>>>> Meinolf Weber
>>>>> Disclaimer: This posting is provided "AS IS" with no warranties,
>>>>> and
>>>>> confers no rights.
>>>>> ** Please do NOT email, only reply to Newsgroups
>>>>> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>>>>>> The XP client machines seem to be slower accessing the internet
>>>>>> via our 2003 server. I have the client TCP/IP settings to point
>>>>>> to the AD server as the primary DNS IP address. When I go to
>>>>>> access the internet, I get "Looking up www.Google.com" in lower
>>>>>> left and there is a delay. The 2nd time I try with a different
>>>>>> www address I get "Waiting for www.dell.com" (for example) and the
>>>>>> page is very slow.
>>>>>>
>>>>>> I tested the DSL speed and all is fine with that, but it appears
>>>>>> to be a DNS problem. Am I right? and how can I set client
>>>>>> correctly? Thanks.
>>>>>>
>>>>>> p.s. I tried adding our outside (ISP) DNS as the secondary on my
>>>>>> client and the initial internet was very fast. But I could not
>>>>>> access our SQL server when I did that until I removed the
>>>>>> secondary DNS. Also, we have a firewall box that is our Gateway.
>>>>>>
>>>>>> David
>>>>>>
>
>