For anyone who is experiencing slow DNS lookups...

I finally worked out what was wrong with my network config last night and thought I'd share it with everyone in a simgle post in the hope it'll help someone else.
I tried the BIND work around, but it wasn't all that much faster.
I tried disabling IPv6, but that didn't do much...
The solution?
In 'System Preferences' -> 'Network'
Go to configure the adaptor (Airport / Ethernet / etc)
In 'DNS Servers' where you'd normally specify the DNS servers given to you by your ISP... don't do this! As crazy as it sounds don't
Of course, if you're using newer routers you'd not be having this slow DNS lookup problem and specifying the ISPs DNS Servers would be appropriate... still
What you want to specify here is your ROUTER's IP:
eg. 192.168.0.1
With this simple modifcation you'll be fine. Why? You ask?
In Linux / OSX (I imagine in Unix as well) the way the lookups are carried out are different from Windows. I have other Windows computers on our network and they never had DNS lookup problems and they've been given the ISPs DNS IPs... anyway I think I'm talking out of my depth now heh.
This works!
Remember: Specify your router as the DNS Server!

I've had this problem on a G4 PowerMac running Panther, and it still had it after a Tiger upgrade. I just replaced it with a Core Duo MacMini, 10.4.7, same problem of slow DNS lookups (i.e., slow initial start to loading a web page, then it goes quickly). Windows machines on the same subnet have no such problem. I've tried the various suggestions on various forums, none of which worked. I tried:
- turn off IPv6 (no help)
- directly enter my ISPs DNS servers (no help)
- manually configure both IP and DNS (no help, went back to DHCP)
- swear at the computer (a little help, mentally)
After some more reading, I tried resolving some addresses using the host command from the Terminal:
host -v www.apple.com 24.34.240.9
where the IP address is one of the DNS servers for my ISP (Comcast). I got a no server found message! I then tried the second DNS server in the Comcast list (found from my router), also no server found. Tried the third one in Comcast's list of DNS servers, and it worked. Entered it in System Preferences -> Network as a DNS server, and now web browsing is zippy! I verified that the two DNS servers that MacOS couldn't see are also down as far as Windows was concerned (using the nslookup command in windows).
What this tells me is that the OS X algorithm for handling unreachable or slow DNS servers is different from that in Windows. Maybe Windows remembers a bad experience with a DNS server and uses ones that it has success with, while OS X just keeps trying them in order, slowing timing them out until it finds one that works?
This could also explain many of the puzzling symptoms people have been seeing (things work some times, other times not; some people have luck specifying the DNS server manually, others don't). It all depends on what DNS servers got distributed to the Mac via DHCP, and how far down the list you have to go to find one that is responsive.
Anyone reading this forum with technical knowledge of both UNIX and Windows DNS lookup implementations? Is there some way to tweak in MacOS to make it perform more like Windows in this situation (like, maybe shortening the DNS server failure timeout)?

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    Last edited by Sharpeee (2008-11-15 10:39:42)

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    I just tried to disable wicd and enable the wired network in /etc/rc.conf. After a reboot and it's still the same, even on the wired, so it's got be some other settings somewhere that's messing things up!
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    Last edited by Sharpeee (2008-11-11 05:01:46)

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    The #1 problem I had once I connected to my office VPN on either wireless or 3G, was that DNS lookups to general internet sites took forever. So to get around this, I created TWO VPN connections to my office network in Network Preferences and in both connections I made sure the option to send all traffic over VPN was left UNCHECKED.
    The first connection I then designated for use when connecting wirelessly at home. Here I manually added the IP address of my home router as a DNS entry.
    The second connection I did the same by adding a new DNS entry, except here I used the DNS server of my cellular data connection, in this case T-Mobile UK.
    When connecting to my office network I just use either of the above connections depending on whether I am connecting wirelessly at home or via my mobile phone.
    It seems a bit long winded I grant you, but after literally months of trying to resolve this annoying problem, this appears to be the only fix that works.
    The downfall of this would be that DNS resolution to any servers on your office network might not work, but that isn't a problem for me since I manually add any servers I use at work to my local hosts file. This negates any need for DNS lookups and actually speeds up access to my work servers.
    In amongst this I did several reboots, so you give your machine a reboot once you've completed the above steps, just in case.
    The 3G connection won't work for you if your provider changes the DNS server every time you connect, but this is unlikely.
    If anyone's got any comments, I'd love to hear them.
    Cheers
    Phil

  • Issue with very slow DNS lookup. SBS 2008 R2.

    (Preface: sorry if this is the wrong forum...new at this! X-posted from Reddit)
    I'm stumped with this one. Last week, the server installed a few updates, no problem, a handful of security stuff. Since then, I've been having issues with DNS lookups on every computer on the network. It will hang on "looking up <domain>.com..."
    and then after 20-30 seconds, it will show a "can't find the server" error. BUT THEN! When you click try again, it loads right up. And then it works fine. For a day or so. Then, the next day, or maybe just a few hours later, sometimes while browsing
    the same site, it will do the same thing. It's like the DNS server just forgets the lookups it's already done after a time.
    Things I've tried:
    restarting server (duh)
    rolling back updates
    reinstalling said updates
    restarting all network hardware from the gateway outwards
    restarting the service itself while the server is running
    The only thing the event log shows is a single error during startup - event ID 4015. The text reads:
    "The DNS server has encountered a critical error from the Active Directory. Check that the Active Directory is functioning properly. The extended error debug information (which may be empty) is ' '."
    This error has only occurred once that I saw and did not occur on the most recent startup, but the issue is still present
    Active directory seems to be fine. No errors or warnings in it and no info from the event log is showing anything that seems to be helpful.
    I've looked around the KB but every article seems to be troubleshooting a much more specific problem or a different problem altogether, such as a misnamed, stuck, or incorrect DNS zone, or a DNS lookup that fails to complete altogether.

    Hi Craigglesofdoom,
    Would you please let us know current situation of this issue? Did you refer to above suggestions and solve this problem? If any update, please feel free to let us know.
    Please also run SBS BPA tool and check if find relevant issues.
    For Event ID 4015, please refer to following article and check if can help you.
    Event ID 4015 — DNS Server Active Directory Integration
    -->The DNS server has encountered a critical error from the Active Directory. Check that the Active Directory is functioning properly.
    Please use dcdiag command-line tool. Any find?
    Domain Controller Diagnostics Tool (dcdiag.exe)
    Dcdiag for DNS: Test details explained
    Hope this helps.
    Best regards,
    Justin Gu
    Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

  • Question for anyone who has the American Ball game

    I've been spending a lot of time saving up my tickets in American Ball so I can unlock some more items.
    I've finally reached 5,000 tickets and I'm wondering if the table that costs 5,000 tickets is worth it.
    Is there any difference between the different skee-ball tables aside  from the appearance?  For example, does the skee-ball table that costs  5,000 tickets have a higher ticket pay-out than the one that only costs  1,000 tickets?  Or is it basically just a different skin with all the same features?

    Hi Julio,
    I sat exam 98-364: Database Fundamentals just to see what the MTA exams were like and found the question difficulty and content very similar to what was outlined in the study guide available from Certiport. I found
    the exam rather easy however I've had quite a lot of experience with databases and also have a number of other Microsoft database certifications.
    You need to keep in mind that the MTA exams are designed for people who are just starting an IT career path or are looking to enhance their understanding of IT fundamentals i.e. These exams are really for beginners. As stated by Davin, you'd probably be
    better off looking into the MCSD: Web Applications certifications.
    When you see answers and helpful posts, please click Vote As Helpful,
    Propose As Answer, and/or Mark As Answer
    Jeff Wharton
    MSysDev (C.Sturt), MDbDsgnMgt (C.Sturt), MCT, MCPD, MCSD, MCITP, MCDBA
    Blog: Mr. Wharty's Ramblings
    Twitter: @Mr_Wharty
    MC ID:
    Microsoft Transcript

  • Still looking for anyone who composes Dubstep?

    I've been working on a project which is dubstep based and was wondering if there was anyone out there who is knowledgeable in this genre?

    I'm afraid you're not really going to get an answer on this forum because your question is a bit too broad based  - it looks like you've got some decent equipment for the kind of stuff you want to do, so..
    It may be because I'm getting to be an old geezer, but I'm not entirely sure what the exact definition of 'Dubstep' is, to be honest - there have been so many variations of music that have been created using sequencer software in some way or another and some people keep imagining that they've created a whole new genre of music, so they give it a name, you know..

  • For anyone who wants a challenge....

    I have an old imac that will not boot into any other form than the login screen.  The computer person who set up the computer did not make me the admin, and I have no idea what the admin password is, so I cannot change what the startup disk is, nor disable the login screen from the system preferences.  I also cannot boot from target disk mode, an installation CD/DVD or any other magical keyboard combinations.  I tried resetting the PRAM, no bongs were heard, other than the original startup.  All I want to do at this point is erase the hard drive and reinstall the system software, but as mentioned earlier, I cannot start up from the DVD.  I do have the Al keyboard connected, but I highly doubt that changing that will fix things, but I will use another one tomorrow to see if that fixes anything.  Does anyone else have any other suggestions? 
    It is designed to connect to our network, so I can login there, and get to my user interface, but again, I am not the admin - but I should also mention that I do own the computer... it is not stolen, hacked or whatever, I would just like it back to it's original state so it could function as a computer again.  I am pretty sure my applecare has expired on this one too, which is unfortunate. 
    Any other ideas would be greatly appreciated! 

    So what does one do when you cannot login the single user mode?
    You need to buy a license of Snow Leopard ($29.00) which is still available from Apple or Amazon and upgrade. Make sure your computer meets the minimum specifications for Snow Leopard which are:
    System Requirements
    Mac computer with an Intel processor
    1GB of memory
    5GB of available disk space
    DVD drive for installation
    Some features require a compatible Internet service provider; fees may apply.
    Some features require Apple's MobileMeservice; fees and terms apply.
    Once you have that you can use this video for instructions on how to do an Erase and Install. The kid is kind of annoying but he knows what he's doing. Clean Install Of Snow Leopard video

  • FOR ANYONE WHOS IPOD WILL NOT APPEAR IN ITUNES NO MATTER WHAT YOU TRY!

    Hey Guys i suffered from this problem for a frustrating three weeks before i tried somthing completely random and it fixed my problem.
    My ipod would appear in mycomputer and itunes would even open when connecting my ipod but would not appear in the menu. TRY THIS!
    1. goto start menu
    2. Click control panel -> Administrative tools -> Computer management.
    3. Click disk management under the storage tab.
    4. Right click your ipod (must be plugged in and possibly in disk mode) and select format.
    5. In the file system tab select "FAT" NOT "FAT32"!!, select 'perform quick format' and click ok.
    After this step my ipod appeared in itunes as a corrupt ipod!
    6. In itunes restore your ipod since it is now on the menu.
    THIS FIXED MY PROBLEM!! i hope this helps anyone with the same problem. :D!!!!
    It is really hard to find a real soloution for problems like this instead of the old "reinstall itunes" I REALLY HOPE THIS WORKS FOR YOU!

    Many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache.
    Note: ''This will temporarily log you out of all sites you're logged in to.''
    To clear cache and cookies do the following:
    #Go to Firefox > History > Clear recent history or (if no Firefox button is shown) go to Tools > Clear recent history.
    #Under "Time range to clear", select "Everything".
    #Now, click the arrow next to Details to toggle the Details list active.
    #From the details list, check ''Cache'' and ''Cookies'' and uncheck everything else.
    #Now click the ''Clear now'' button.
    Further information can be found in the [[Clear your cache, history and other personal information in Firefox]] article.
    Did this fix your problems? Please report back to us!

  • $100 Reward for anyone who can fix this issue

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    http://h30434.www3.hp.com/t5/Other-printing-questions/Ink-cartridge-empty-but-it-s-not/m-p/176836
    The fix must eliminate the false error message that a cartridge is empty and enable the printer to resume printing. 
    As you can see in the link, people have struggled with this problem for years and no consistent fix has been discovered.  I am hoping that a smart person out there can find the cause of this problem and a solution for it. 
    I suspect that a file or registry entry must be set that indicates a false empty cartridge.  This false entry is retained even when a new cartridge is installed, or the printer software is removed and reinstalled.
    Even though many people have worked on this issue over the years, there still may be a creative solution out there.  Let's hear it and if it works you get the money.

    Hi,
    Reward not required nor needed...
    But... I didn't see a post in your link about using a newly created utility by hp.  I don't know if there is a fix in the utility although it has fixed some other printer issues... something that could be tried.
    http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=mp-82717-1&lc=en&dlc=en&cc=us&...=
    Say Thanks by clicking the Kudos Star in the post that helped you. Please mark the post that solves your problem as Accepted Solution.
    I am employed by HP

  • Sourcecode for anyone who's interested

    Hi there,
    I started a project on sourceforge. DevEnhancer
    https://sourceforge.net/projects/sapb1-ui-di-fw
    It's a framework or a toolbox for Business One developers.
    About 2500 lines of code.
    I decided to put it on sourceforge, because the project is
    very nice hosted there.
    You'll find there two files. The first one is the C# file with the code
    and the second one is a chm file with the extracted class and method
    definitions. I haven't included so much examples, but I think most of the code
    is self explaining.
    Only thing to do is to include it in your Visual Studio Project and add two
    references to SAPbobsCOM and SAPbouiCOM.
    If anyone is interested in joining the project ask me.
    If you think, it's useful, write me suggestions or bugreports.
    If you want to use it, no problem, it's under GPL, open source
    Any comments are welcome.
    <b>[email protected]</b>
    <b>[email protected]</b>
    Hope, you have fun.
    Regards,
    Holger
    PS: This is a prealpha release, so don't think, it is bugfree

    My 23" display is one of the first to ship last July (2004). It has the uneven colors (when viewing a blue screen) and the pink hue. So far in its life it has had two pixels go stuck blue (I check it when i got it and it had zero stuck pixels) and one firewire port die.
    Lately I've had problems with "burn-in" such that on gray color backgrounds or windows (like the default color it seems to pick when switching wallpaper) show residual images (faded ghost images) of previously displayed things. The top bar where the menu is seems really burned in (I can see it on the blue login screen).
    I've been holding out too for a confirmed fix. I have an extended warranty till 2007 so I'm in no rush.
    I had someone postl this on my thread at macrumors about their display being repaired:
    Here is the message that has just been posted:
    I purchased a reconditioned 23" Aluminum from Apple last month, and after the first one died within 5 days, I received a second one with serious pink hue problems and MAJOR ghosting. After an hour on the phone with apple, they said all they can do was fix it. I wanted out of the 23" because of all the problems I've heard. Anyway, they sent a box, I packed it, and when it returned, it was finally excellent. They replaced Part # 646-0264 APPLE, Q49, LCD, LM230W02(ST)(02)and #630-6942 APPLE, Q49 MLB REV C whatever that is. Hope this helps.

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