DNS problems on Lion

Hello,
Ever since I "upgraded" to Lion I have had DNS issues.
I know it's a DNS problem because IP addresses work fine. And I know it's not a browser issue, because I am running 'ping google.com' from the command line.
The symptoms are non-responsive queries to DNS servers, in web browsers or the command line (using ping). Currently I am using google's DNS servers: 8.8.8.8 and 8.8.4.4. I'm absolutely sure that there is nothing wrong with those servers. The request to the DNS servers eventually times out, and then I hit "Refresh" and the page loads fine.
Also, if I recylce the network adapter, e.g.
$ sudo ifconfig en1 down
$ sudo ifconfig en1 up
DNS starts working again, temporarily until the next time. It happens again (randomly, not at regular intervals), I then run the ifconfig down/up again, and DNS works again, and so on.
This started happening when I went to Lion.
Thank you

I have just purchased a brand new Mac Mini Server with Lion Server running. Managed to set up DNS service and 5 zones configured and running fine for 1 to 2 days.
The DNS in Server Admin suddenly stopped loading the information and buttons are all greyed out last night, with no changes made since I was away at work. It keeps getting the same situation as thread starter mentioned. I have tried all possible means but it just stop loading zones information anymore.
I would like to try John's approach but it seems I am unable to get 'root' access to perform those actions. Thus would appreciate some advice on how to proceed forward to resolve the issue.
1. Tried the Directory Utility approach to "Enable Root" but when enter terminal, 'sudo root' does not seem to accept the password I have set. Is there any other means to enable an account to have sufficient access to perform those DNS related resolution steps?
2. Is there any location to obtain a copy of the default named.conf?

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I am having a DNS problem with my computer. My laptop connects to the internet and my skype works normally but when i try to surf the web it says "DNS Look up failed".

MY PROBLEM
I am having a DNS problem with my laptop. It connects normally to th e wifi internet but when i try to surf the net it says "DNS Look up failed"
This problem only occurs when with the internet at my house. whenever i connect elsewhere my computer works normally. My ipod, iphone, tablet and other friends computers work normally when they are connected to my internet. i use dmy neigbours nework a couple of times from my house and it wrks normally.
Also when i turn my laptop on or off i can browse for a few minutes or seconds before it fails again. My skype works like there is no problem
WHAT I HAVE TRIED TO RESOLVE IT
I have tried changing the DNS, i used open DNS and google free DNS and it still didnt make a difference.
I have rebooted router many times, nothing
I have changed my home router, nothing
I backed up my computer, resored everything it to factory setting and put everything back on; still nothing
Run a diagnostics at 'Best buy' and they say nothing is wrong; but i know there is something wrong with the DNS
I have tried different "sudo" type of codes on my comupter from stuff i got online and nothign has proved fruitful yet.
i tried using safari, Google chrome and firefox, all not loading
WHAT DO I DO TO FIX THIS?

You are correct. Syncing should transfer any purchased media, including videos, from your device to your iTunes library provided your computer is authorized for the Apple ID used to make these purchases. You mentioned that you have uninstalled iTunes before, but if you didn't follow this guide exactly, uninstalling iTunes and all of its components in the order specified, it may not have been successful so you should try again: Windows XP or Windows Vista/7.

Problem with Lion 10.7.3 with hp laserjet 3600n network printer

Hi
Problem with Lion 10.7.3 with hp laserjet 3600n network printer
Guys i am having a mad day with this new OS and some network printer none of them work with new LION,The software for this printer is currently unavaliable. Please contact the printers manufacturer for the latest software, i need the drivers for this, please give a hand with this issue
Best Regards

Exactly the same infuriating problem we and many others get with OS X from 10.6 on when Apple dropped Apple Talk.
Having spent days fighting to get drivers that will run our older laser printers like HP5000, 5100, 2100, 2200 and 4MV, we came up with a simple solution:
We use an iMac running 10.5.8 as a print server. All the 10.6 upwards Macs on the same network will see and add the printers immediately through the shared older (Apple Talk) iMac.
Cheapest and simplest option really .... it'sannoying that a brand new Mac can no longer see existing network printers without complex investigation and trying various downloads.
Answer is simple and cheap if you happen to own a 4 or 5 year old Mac with an OS lower than 10.6 which still has Apple Talk.

Windows 7 VM has DNS Problem When Using Wireless

Hello All,
I've been fighting this virtual machine networking problem for over a week now. If anyone has a well-informed suggestion (not a guess) I would appreciate hearing about it.
Here's the problem in a nutshell and then I'll give more details: I'm running Windows 7 Ultimate (64 bit) as my primary (i.e., host) OS. I'm running Windows 7 Home Professional (32 bit) as the guest OS in "Windows Virtual PC" (note that this is *not* the same as "Virtual PC 2007"). If I configure the VM to use my host's wired Ethernet connection, the guest OS can always see the machines on my local network and can always reach the Internet just fine. On the other hand, if I configure the VM to use only my host's wireless connection then the guest OS can still see machines on my local network but CANNOT reach the Internet, except very intermittently (e.g., for maybe 1-2 minutes every hour or so).
I've tried to anticipate the questions you might ask so here is some additional information:
The computer is a Lenovo W500 laptop running Windows 7 Ultimate, 64-bit. The wireless network adapter is an "Intel WiFi Link 5300 AGN".
My Internet connection is via AT&T DSL using a wire2 wireless modem/router.
I have all the updates from Microsoft and Lenovo for this machine. It is 100% up to date with the latest patches and drivers.
I'm running the 64-bit version (or at least I used the 64 bit installer) of "Windows Virtual PC" which I downloaded from this link.
I am *not* running and I did not download "XP Mode".
When the guest OS loses it's connection to the Internet the following message appears in the Windows Event Log:
"Name resolution for the name address.yahoo.com timed out after none of the configured DNS servers responded."
I am able to ping an external machines outside my network but only if I use the IP address. If I specify the host name it cannot be resolved.
ARE YOU GETTING THE IMPRRESSION THIS IS A DNS PROBLEM??? It looks like I do not have access to a DNS when using the host's wireless connection.
On the host OS, the "Virtual PC Network Filter Driver" *IS* installed and selected under my "Wireless Network Connection Properties" settings.
Below are the results of running ipconfig on the guest OS and then the host OS. Note that I am able to ping 192.168.1.254 from the host OS but not from the guest OS. I think this is the crux of the problem.
Here's what I get from an ipconfig /all executed on the guest OS:
Windows IP Configuration
   Host Name . . . . . . . . . . . . : Win7_01
   Primary Dns Suffix . . . . . . . :
   Node Type . . . . . . . . . . . . : Broadcast
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : gateway.2wire.net
Ethernet adapter Local Area Connection:
   Connection-specific DNS Suffix . : gateway.2wire.net
   Description . . . . . . . . . . . : Intel 21140-Based PCI Fast Ethernet Adapter (Emulated)
   Physical Address. . . . . . . . . : 00-03-FF-5A-E5-8C
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::6452:ad20:724a:4d3a%11(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.1.75(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Friday, May 14, 2010 7:22:30 PM
   Lease Expires . . . . . . . . . . : Friday, May 21, 2010 7:22:30 PM
   Default Gateway . . . . . . . . . : 192.168.1.254
   DHCP Server . . . . . . . . . . . : 192.168.1.254
   DHCPv6 IAID . . . . . . . . . . . : 234882047
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-13-79-57-1A-00-03-FF-5A-E5-8C
   DNS Servers . . . . . . . . . . . : 192.168.1.254
   NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter isatap.gateway.2wire.net:
   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix . : gateway.2wire.net
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Teredo Tunneling Pseudo-Interface:
   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
And here's what I get when I do ipconfig /all on the host OS:
Windows IP Configuration
   Host Name . . . . . . . . . . . . : LEONA
   Primary Dns Suffix . . . . . . . :
   Node Type . . . . . . . . . . . . : Broadcast
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : gateway.2wire.net
Wireless LAN adapter Wireless Network Connection:
   Connection-specific DNS Suffix . : gateway.2wire.net
   Description . . . . . . . . . . . : Intel(R) WiFi Link 5300 AGN
   Physical Address. . . . . . . . . : 00-21-6A-59-E5-8C
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::94b0:4080:c30f:95da%12(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.1.78(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Friday, May 14, 2010 6:20:52 PM
   Lease Expires . . . . . . . . . . : Friday, May 21, 2010 6:20:53 PM
   Default Gateway . . . . . . . . . : 192.168.1.254
   DHCP Server . . . . . . . . . . . : 192.168.1.254
   DHCPv6 IAID . . . . . . . . . . . : 218112362
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-13-79-34-70-00-22-68-14-2F-CB
   DNS Servers . . . . . . . . . . . : 192.168.1.254
   NetBIOS over Tcpip. . . . . . . . : Enabled
Ethernet adapter Local Area Connection:
   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix . : gateway.2wire.net
   Description . . . . . . . . . . . : Intel(R) 82567LM Gigabit Network Connection
   Physical Address. . . . . . . . . : 00-22-68-14-2F-CB
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
Tunnel adapter isatap.gateway.2wire.net:
   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix . : gateway.2wire.net
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Teredo Tunneling Pseudo-Interface:
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e74:3ca6:3214:b4fb:72d4(Preferred)
   Link-local IPv6 Address . . . . . : fe80::3ca6:3214:b4fb:72d4%13(Preferred)
   Default Gateway . . . . . . . . . : ::
   NetBIOS over Tcpip. . . . . . . . : Disabled

Hello,
I am not very familiar wth Microsoft Security Essentials, but believe that it just makes use of the existing Windows Firewall which is present with the operating system.
To me it is odd that the guest OS reports 192.168.1.254 as the IP address for its gateway and DHCP server yet it cannot access them when pinged. Let's try pinging from host to guest (and vice-versa) and see what happens:
From the host OS at 192.168.1.78, try pinging the guest OS at 192.168.1.75.
Then, from the guest OS at 192.168.1.75, trying ping the host OS at 192.168.1.78.
Is each operating system able to ping each other?
Regards,
Aryeh Goretsky
I am a volunteer and neither a Lenovo nor a Microsoft employee. • Dexter is a good dog • Dexter je dobrý pes
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Startup problem with Lion OS 10.7.3

Just recently, I've been experiencing a startup problem with Lion. I don't usually have any issues running my Mac, so I'm at a loss why this is happening now.
I have an Intel Mac Pro running 10.7.3. I usually leaving my Mac running all the time and only restart when the need arises. In addition to being my main computer, this mac alsocontrols a MacMini that serves as a music server thru screen sharing.
This past weekend, I restarted my Mac and could not get past the grey screen. The mac chimes, the apple logo appears with the spinning gear, the blue screen briefly appears, but instead of progressing to the desktop it reverts to the grey screen with a repeating cycle of the spinning gear appearing (spins for a while, stops, disappears, reppears spinning, stops, disappears, over and over) - never progressing beyond that stage.
I decided to reinstall the system and things have been fine for the past few days. Today, restarting again resulting in the same problem.
I've tried several things without success. I disconnected all peripherals, reset the PRAM/SMC, ran Disk Utility from a install volume and ran repair and permissions (no problems reported). Tried safe mode startup - a progress bar appeared but never fully progressed and could not get to the desktop.
Recent changes included updating the OS to 10.7.3 and Adobe Photoshop CS5.5 - no recent hardware changes. No bluetooth devices connected.
Any thoughts? Thanks -

Thanks -
I've reinstalled the OS today and am back up and running.
But, since this is twice this has happened within the past week, I'm worried about might be causing this issue - besides bad luck. My Mac is usually rock solid - can't remember the last time I've had to reinstall the OS in the past few generations of OS X.

My problem started when system preferences was unresponsive and would not force quit. I tryed to restart and got the grey screen, but it never restarted. I closed the lid and now the screen is blank. Has anyone had a similar problem after Lion?

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No, as I have yet to be convinced on Lion.
Did a permissions repair help from the install DVD?

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Is there a fix for the WIFI problem with Lion? How can I get Lion off of my Mac?

Is there a fix for the WIFI problem with Lion? How can I get Lion off of my Mac?

gmiller0 wrote:
My mac has 10.7.3 and will not connect to wifi after it wakes up. Have contacted AppleCare but the problem cannot seem to be resolved.. I guess this is a major issue with Lion:(
What model of Mac? I have a MBP running 10.7.3 and do not have that issue. From the other couple of posts I've seen about it, it seems to be maybe an issue with some iMacs? Have your tried searching the Lion or iMac forums for similar issues, just to see if anyone has hit on why it is happening?

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I have the MacIntosh volume and the Boot Camp partition only. I know that when I installed Lion, I had to go through a whole back-up and recovery of Windows and then re-format the drive.
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I do not have another installation, so that is not an option. I will try to create an external, I have plenty of hard drives around and see if I can get it done that way. It might take me a week or two to get back to it, but I will comment back upon completion of that effort. Thanks for your help....Dave Iverson

My MacBook Pro, 1.83 GHz Intel Core Duo gives me an error message during Lion install. My Intel Duo Core is not an Intel Duo Core and cannot install Lion. I already have Snow Leopard what is the problem with Lion?

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Try booting in Safe Mode by holding the the shift key immediately after powering on your system. Safe boot mode will for a directory check of your startup volume, then load only the required kernal extensions (kext files), and deletes some cache files. Once the system boots into Safe Mode you can simply restart the system to see whether the issue has been resolved.
If you still have the issue try resetting the SMC by shutting down the system and disconnecting the power cord for ~15 seconds, then reconnecting the power cord. Next, reset the parameter RAM (PRAM) by holding down the option-option-P-R keys after powering ON the system. Wait until the iMac restarts twice, then let the system boot normally.

Strange DNS problems wrt160n v2

My router worked fine with 60mbit internet, i bumped up to 90mbit, and it worked fine for 2 weeks or so, and then one day my desktop, with a wired connection, started to go nuts with the DNSserver, what screwed up the internet, pages would not load, when i refreshed the page it would load, but 5 or 6 mouseclicks further and the DNS was gone again... i changed everything, all the settings, the utp cable, even Vista had to go, just to be sure.. but nothing worked, except removing the router, but that was no option for my laptop, which was working perfect, never had a bad connection or DNS problems....
I went back to the store with the router and there it worked fine, tested everything, but no problems, i came back home, hooked it up, and the problems where back...
Anybody got a clue, my only idea about this is that the 160n cant cope with the 90mbit,i got p. off and bought myself a wrt320n which works perfect, wired and wireless.

WRT160N does work with 90 Mbit...might be the settings are not proper on the router.
However its great that your were able to resolve the issue by WRT160N...

Snow Leopard and DNS problems

Hi
I read a lot about SL and DNS problems while accessing websites. It seems that you have to put your DNS server in system settings/network so that you don't get the error message "can't connect to the internet' in your browser window. My problem is that I change locations with my mac quite frequently (home, uni etc) so whenever I am a a new location I have to go to the network settings and manually put in the DNS server. Why do I have to do that with SL when it worked completely fine before the upgrade to SL?
Cheers
Martin

waschbaer22 wrote:
That is exactly what is happening. The problem with my DHCP server at home is that it doesn't submit the DNS address to the computer somehow. That's why I have to put it in manually each time I reconnect the MB at home after I had it at uni. Once back at uni I then have to go into the settings and delete my manually added home DNS server. Right after that the uni DNS server address appears automatically. So I guess that is just how SL now works and I have to live with it, right? However, why do we need a DNS server anyway to connect to the internet. I thought a DNS server just facilitates the connection to websites but I didn't know that it is crucial.
You should really try to figure out why your home router isn't providing you with a DNS server address and fix that. It could be a firmware issue, or it could be as simple as you have things set up so that one must manually be set up in the router, and one is not.
You are also misinformed as to DNS' importance.
DNS is the service that translates names - say "apple.com" - to the IP addresses - say "17.149.160.49" - that your machine needs to be able to connect to any site.
Without being able to resolve names to addresses, you have to manually specify numeric IP addresses for everything - effectively meaning you will be unable to use the Internet.

I'm having to many problems with Lion freezing up and want to go back to Snow Leopard,how can I do this?

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2 Nights ago we had storms in the area; next morning wife calls me at work and says that internet connection does not work. Get home and take a look at it. I can connect to router wired or wirelessly, was able to look at the configurations, etc. but when I try to access internet pages I get an error indicating DNS problems.
I have cycled power on cable modem (also Linksys but don't remember model number at the moment) and router. Still had the same problem wired and wirelessly.
I reset the router to factory defaults, connected to it both wired and wirelessly and still had the DNS rpoblems.
I reconfigured the router with my original security settings, connected to it wired and wirelessly and still had the DNS problems.
I connected directly to the cable modem and had no problems accessing internet at all.
Is there any way that I can force the router into updating DNS information? Or possibly reset DNS information?
I have run out of things that I know to try. I hope someone can help.

Usually a DNS problem is caused because the router is not connecting to the Internet properly.
Since you have a cable modem, you can usually leave the WRT54G set to its factory default settings, except that you might need to "Clone the MAC address" of the computer that works when connected to your modem.
Hope this helps.
If you need more help, please do the following:
1) state your ISP
2) state the make and exact model number of your modem (not the WRT54G).
3) Connect your computer, by ethernet cable, directly to your modem (not the WRT54G). Verify that you have a properly working Internet connection, then do the following test:
Go to "Start" > All Programs > Accessories > Command Prompt.
A black DOS box will appear. Type in "ipconfig /all" (with no quotes), then hit the Enter key. Post all of the results, except if your "IP address" does not start with 192, then post only the first 3 digits of it, along with the rest of the info. To copy the info to your post, highlight (select) the info, then use the copy (Ctrl-c) and paste (Ctrl-v) keys.
Message Edited by toomanydonuts on 05-16-2008 07:13 AM

DNS problems on Lion

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