DNS server responses extremely slow

I set up the DNS Server running on my LAN (authoritative for a fully-owned domain), and I do believe it's correctly set up - reverse mapping works fine, no error messages in the logs or while watching tcpdump, etc. It's behind my NAT/Firewall, is set to be recursive (but I have not tweaked it to make it recursive only for the subnet). My problem is with the performance. Using this internal DNS server to provide DNS for my client machines on the LAN, internet lookups are awfully slow - perhaps five to ten seconds to bring up a major site. Leaving everything else the same on a client machine, and removing the references to the internal DNS server - thus using my ISP's DNS servers outside my LAN - the same site can by fully up in one second.
Is this major lag in performance simply caused by the fact that the ISP's DNS server is so often caching many many more sites than I could ever request from my own LAN? Or should I be looking for something specific to hunt down perfformance problems?

If your server is stand-alone, you can run without internal DNS.
If OD Master, you also can run without internal DNS but config of course needs to be correct. Many people say it's best to run with internal DNS, but it's not a requirement.
One reason to run internal DNS..
If you connect to your server by fqdn (host.domain.com).
Without internal DNS, the client will connect to the public IP (wan side of your router). If your router supports loopback, this will work- if it doesn't support loopback it won't work. Even if it does work, you are forcing your client-server traffic to be processed (NAT) by the router, incredibly inneficient (although a simple config for basic requirements). If you're moving big files with AFP, you don't want all traffic to go from client-router(NAT)-server-router(NAT)client. You can get around this by connecting using .local or IP addresses. So this all depends on your config, requirements, habits of the users, etc.
JJ

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E4200 - DNS Lookup Is Extremely Slow

Pros: Sometimes, it times out. I don't know what's wrong. I'm thinking of returning the unit. I'm using Comcast and everything was super fast with my trusty old Linksys WRT-54GL. Nothing good about this unit. Cons: DNS Lookup Is Extremely Slow. Sometimes, it times out. I don't know what's wrong. I'm thinking of returning the unit. I'm using Comcast and everything was super fast with my trusty old Linksys WRT-54GL

If I relate your issue then the above mentioned solution justifies the troubleshooting steps to be taken, however, in addition to that I would also like to suggest you to try and install your Linksys E4200 router using the Cisco Connect Software just in case, if you are not using it....
Installation disc that came along with your router would help you in installing this router using the Cisco Connect Software, using which you can expect this router to offer you best throughput with both wired and wireless connectivity.....
To set up your router using the Cisco Connect Software, you can use:
http://www6.nohold.net/Cisco2/ukp.aspx?pid=80&app=vw&vw=1&login=1&json=1&docid=e30f926604334d5386685...
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Exchange 2013 with Outlook on RDS Server is extremely slow

Exchange 2013 CU5 on Server 2012 R2 fresh install/new to domain; Outlook 2010 or 2013 on Remote Desktop server not in cached mode is slow to open, search and send messages with attachments. Opening messages and opening attachments runs quickly.
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Hi,
How about the suggestion from Festivalman?
Feel free to contact me if there is any update.
Thanks
Mavis
If you have feedback for TechNet Subscriber Support, contact
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Mavis Huang
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Server 2012 extremly slow

Hi!
Just installed MS Server 2012 R2 Standard 64-bits on a HP Pro Liant 380p host. When trying to connect the network cable to the network and domain the GUI becomes extremly slow (can't drag the mouse without waiting for some seconds or open windows). We
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Hi
I would suggest getting up to date drivers for the machine. Also check the event viewer on what is failing.
how much ram do you have in the server?
Hope this helps. Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
Drivers is up to date, event viewer gives no information and it's 96GB RAM installed.

Snow Leopard Server running extremely slow all of a sudden!!

Hi, I'm not a qualified server technician but am currently trying my best to run a server in a Secondary School! Please help, need to fix ASAP.
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Your comment indicates "crash the computer"? Do you mean that OS X Server itself fails, and you have to reboot? Or that the application crashes, and you have to restart it?
The following are some general approaches toward gathering some data:
Launch Console.app from Applications > Utilities and see if there are blocks of repeating errors.
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sudo changeip -checkhostname
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Boot from the Snow Leopard installation DVD and run a volume verification pass using Disk Utility, this from the Utilities menu of the installation disl.
FWIW...
If the applications or OS X Server are crashing, then you're generally heard toward either a reinstallation of the software, or a hardware repair, or quite possibly a combination of the two.
Forcing a hard shutdown can lead to corruptions, depending on exactly what's going on when the power drops out; that's probably best left as a last-resort approach and one best avoided.

Mac OS X 10.4.11 Server gets extremely slow - virtual memory huge.

Hi there,
we use a XServe G5 with Mac OS X Server 10.4.11 installed for Directory and File Services. Since 2004 the server worked without any problems. But now it gets really slow sometimes. Using the keyboard connected directly to the XServe it is even hard to reboot it. We found out after trying to locate the error that the virtual memory is about 24 GB. That size is nearly unmanageable for that server. I don't know how the virtual memory gets that huge.
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Hello,
You can't increase the processor speed, what you can increase is the drive space (Either delete old files or replace the drive for a larger one) You could also increase the memory from 2.5 GB to 4 GB which should help speed this MacBook up a little more.
Upgrading the OS to Leopard wont make much difference on the speed of your MacBook, but it would increase the updates available. personally I would clear down files on my Hard drive, archive on USB disk anything not required. Then install more RAM were possible,
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DNS look up very slow

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See ideas in previous thread.

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Running this router for 2 years without any problems (even on Windows7 since las year), recently it won't let me conect to the internet, Network and Sharing Center say that the pc's configuration are alright but no DNS Server response is present.
(Windows 7 Ultimate x86 RTM, Bellsouth/AT&T ISP in Florida, US. DSL conexion, brand new ethernet cables and hardware kept in the best shape, Network Adapter: Realtek RTL8102E/RTL8103 Family PCI-E Fast Ethernet NIC (NDIS 6.20)(v7.2)
================================================================================
What I tried:
Resetting the router and/or modem (connected to a Westell 6100), setting both to default settings over and over (Web based reset and reset buttons)
IP Flushing in CMD
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===========================================================================================
I'm not much of a tech guy, and reading the forum didn't help me much, so I'm asking for some help please.
Ps: Installed default CD for it with its old EasyLink Advisor to no avail, also tried the latest Lela 2 EasyLink Advisor to no avail.
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Message Edited by daydreamingby on 02-11-2010 07:49 PM
Message Edited by daydreamingby on 02-11-2010 07:50 PM
Solved!
Go to Solution.

As your ISP is an DSL provider, Most of the DSL Modem has a DHCP on them, so they acts like an Router. So right now you connection type is NAT behind NAT.
To make your Linksys Router work with an DSL Modem. Login to the Linksys Router setup page and below the setup tab you need to change the "Local IP Address" to 192.168.2.1 and click on Save Settings...
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DNS server not responding

Hi!
I've been having problems lately about my network. I cannot find any connections on my computer, and I have to use an ethernet cable to connect and use the WiFi. The trouble shooter told me to plug the ethernet cable in and try if it works, but later on
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hi Mr.
Park
Are
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Extremely Slow Response when attempting to display files on Windows Server

I have set up File Sharing on my MacBook Pro using SMB and defined the folders that are available to be shared. When I look at the Network Neighbourhood in Windows Explorer the Macbook appears listed with all the other PCs on the network. When I try to open the Macbook in Explorer it takes a very long time to open (about 2 minutes or so) and shows me the list of folders. When I try to open a folder the exact same thing happens - it opens after a couple of minutes, this continues for every folder that I try to open. I thought it might be that Explorer needed to "catalog" the files in the folders but the same thing happens each time - if I close the connection and try again it takes the same amount of time. What is very strange is that if I connect to the Windows Server from the Mac opening and looking at shared folders/files is instantaneous so clearly this is not a network problem. If I use the Win2K3 server to look at other computers/files the result is the same - instantaneous access, so it has nothing to do with the Win2K3 server - clearly the problem is with the MacBook serving up the file information to the Win2K3 server. I have tried with AFP on and off and the result is the same. The user name/pwd is the same on both the Win2K3 and the Macbook - and I have tried with a different username on the Win2K3 - no difference. Anyone have any ideas as to why this is happening?

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Weblogic 12c Admin Console Extremely Slow Response in "Servers" only

Hi,
I have downloaded and installed weblogic 12c today on IBM p702 blade centre running AIX 7.1 & IBM Java 7. Everything is working fine; Admin Server, Node Manager, etc.
I am facing a strange kind of problem and need your kind suggestions.
When i login to Admin Console 12c and i click on the "servers" link under the domain -> environment; the server response is extremely slow. However, the rest is fine. There is no application deployed and no warning + exception/error is in logs (node manager, admin server out etc.)
Please advice!
Good Day.
Atti
Edited by: user1659354 on 11-Jan-2013 01:07
Edited by: user1659354 on 11-Jan-2013 03:07

This happens when node managers are not running (or not reachable), as it tries to obtain the status of the servers that are deployed on different machines.
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Hi,
I am now using Translator API to translate input data from users in real time on our web application.
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Hi,
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I recently set up a new internet service with Cox, plugged in the SB6141 and A1408 and everything set up perfectly, solid green light and wireless was flawless. However, electricity to my house had to be reset, and when the power came back on the green light on the Airport Extreme started to flashing amber. I did several hard/factory resets of the Airport Extreme as well as unplugging the modem and leaving everything unplugged for several minutes and then plugging everything back in. No matter what combination of things I try to do, the Airport Utility always tells me the same 2 errors: invalid IP address and no DNS server. Why was the Airport Extreme able to automatically set up the first time, but not now? Any ideas of what I can do? Thanks!

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Hi Darren,
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How can I speed up logins using MacBooks to a Windows Server 2008 environment. Logging onto the network is extremely slow. We are using a wireless connection to the network in classrooms

I work in an Education environment with Windows Server 2008. I am trying to join our Macbooks to Active Directory. They are joined but the login is extremely slow. I read that this is because of a possible problem with an OS update.

Check the ethernet link speed when connected directly to the TC.. if you are plugged into the modem direct.. and comparing that with wireless on the TC we have no way of knowing where the issue is.
There is some issue related by someone when the TC was bridged.
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DNS server responses extremely slow

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