Limited Internet Access -- Cannot resolve names but can ping IP addresses

Hi,
I'm almost at wits end here with the problem I'm having with my MBP running 10.6.7. Here's what's happened on my end:
I'm an IT professional working with both mac, linux and PC. I upgraded to 10.6.7 a few weeks ago and everything was fine. As a part of my job I volunteered to test a VPN accelerator application from Riverbed that uses one of their "Steelhead" appliances. I installed the software and was testing it when suddenly my machine froze completely and I had to force-power cycle the laptop to reboot it. When the laptop came back up, it reconnected to the network but I was unable to resolve any IP addresses from name.
I tested the connection repeatedly. I tried different networks. Switching between hardline and wi-fi. I blew away all network configuration and started from scratch. Three times. restarted the mDNSresponder. I uninstalled the appliance software, repeated the network blow away, and tried to connect. I tried reinstalling the software - no dice. Which leaves me where I am now: making a full backup of my drive and important information and formatting it.
I was hoping beyond hope that someone could point out a possible solution that doesn't involve the nuclear option on my files. I have a lot of applications installed and it will take DAYS of work just to get the machine back to where its supposed to be. I dare not reinstall from a full backup because I don't know which touched file is the culprit in my painful experience.
At the time when my PC crashed the software was likely intercepting and rerouting name-to-ip resolution to make the accelerator work. It must have temporarily altered a core networking file somehow to accomplish the redirect. When I crashed, the file was locked in a changed state and nothing I do can alter that. I've searched the appliances' web site and scoured Google looking for some hint as to what might have went wrong and tried to find a solution, but it seems that I'm the only person to have had this issue so far - either that or the solution is hidden on page 8,137 of Googles' results after all the ads have been passed up.
The only thing that I can think of is that my machine was running vmware at the time, and that a combination of VMNET screwing up and the Steelhead appliance application caused my machine to hose itself.
Like I said, the only thing I haven't done is format and reinstall - something I'm loathe to do at this moment because work is very busy. I still have my bootcamp partition and I've been using that for my work. Right now I am using a borrowed Mac Air to surf the net while I trawl through the various files on my Mac partition.
So if anyone has had the patience and fortitude to read this far, I'd greatly appreciate any help or suggestions that others might be able to offer! Especially since if I have to deal with any more problems from this VPN device it would be nice to know how to fix this issue.
Here's a brief summary of what works:
- Ping via IP address (any location on the net)
- Manual entry of IP to name translations in the hosts file. (did this to re-download the 10.6.7 cumulative updater)
- nslookup works for some god-unknown reason.
Here's what doesn't:
- Name resolution through web browser or ping from the terminal or network utilities.
Thanks,
Roger.

Roger,
Nslookup queries the DNS server directly, while other programs (e.g. web browser, ping, etc.) use a system call (gethostname2) which goes through Apple's DirectoryService. The fact that both your VM's and nslookup are working indicates your computer can contact the DNS server via UDP and that the problem probably lies with DirectoryServices.
Do you have a VPN client installed (something other than Steelhead)? VPN clients modify DNS resolution in order to give you name lookup for servers within the VPN. If you do have a VPN client installed, have you tried uninstalling/ reinstalling it?
Another approach is to enable DirectoryService verbose logging from the terminal:
sudo killall -USR1 DirectoryService
Try a ping and then take a look (or post) the log:
/Library/Logs/DirectoryService/DirectoryService.debug.log
-Brendan

Similar Messages

Can I still get CS5 trial - I have limited internet access and just want software on my pc - I am only running vista so that looks to be the latest that will work for me

Can I still get CS5 trial - I have limited internet access and just want software on my pc - I am only running vista so that looks to be the latest that will work for me
If so what url do I go to as I have been round in circles and always come back to CC
Thanks

Downloadable installation files available:
Suites and Programs: CC 2014 | CC | CS6 | CS5.5 | CS5 | CS4, CS4 Web Standard | CS3
Acrobat: XI, X | 9,8 | 9 standard
Premiere Elements: 13 |12 | 11, 10 | 9, 8, 7
Photoshop Elements: 13 |12 | 11, 10 | 9,8,7
Lightroom: 5.7.1| 5 | 4 | 3 | 2.7(win),2.7(mac)
Captivate: 8 | 7 | 6 | 5
Contribute: CS5 | CS4, CS3
Download and installation help for Adobe links
Download and installation help for Prodesigntools links are listed on most linked pages. They are critical; especially steps 1, 2 and 3. If you click a link that does not have those steps listed, open a second window using the Lightroom 3 link to see those 'Important Instructions'.window using the Lightroom 3 link to see those 'Important Instructions'.

I received a text today while at work about iCloud keychain verification code. I have not signed up for it or anything that uses it. I work out of the city with limited internet access so not sure why I would be getting this. Is my info safe??

I received a text today while at work about iCloud keychain verification code. I have not signed up for it or anything that uses it. I work out of the city with limited internet access so not sure why I would be getting this. I only got this number about a month ago. Apparently someone else had the number before because I get texts from his family members wondering whats going on. I got one yesterday and the person didn't seem to thrilled that the number was cutoff and today I got 2 texts about iCloud Keychain which I don't even know what it is. Seems suspicious to me. If the person who use to own the number is doing it he should know it is not his number anymore because he obviously didn't pay his bills. I'm not too sure about iCloud Keychain so just want to know my info safe?? It says it can store credit card numbers which is what gets me worried. Frankly I think it's pretty stupid to save that kind if information with any kind of app. But I don't want some random person trying to access my personal information because they are bitter they lost their number. Please let me know as soon as possible so I can change passwords or anything that is needed.
thanks

If it were me, I would go to my carrier and get a new number. Since you have only had it for a month, the inconvenience would be minimal.
Barry

Installing Sun ONE 5.2 on Win2003 w/no domain "cannot resolve name"

Hi all,
Any way to install Sun ONE 5.2 on Win2003 server w/no domain? We only have workgroup. I cannot get past this 1st step of install. If I try to make something up, I get "cannot resolve name" error. It allowed "Dell-2003.domain.com" (Dell-2003 is computername) the first time through, but install failed. Any tips?

Just what is your hosts file looking like?
I guess your XP box has an IP address... if not you will get problems sooner or later.
Ok. assuming you have an IP allocated to your XP system a line like:
123.123.123.123 xpbox.mydummydomain.com
in the c:\winnt\system32\drivers\etc\hosts file should work...
where 123.123.123.123 is the IP address of your workstation and xpbox is the name. mydummydomain.com is the dummy domain that xpbox is faked to be a member of.
Now, when you install iPlanet the install process gets the computer name and you provide the domain (mydummydomain.com) the install process can resolve the name to an ip via the hosts file as last resort.
If your xp box uses DHCP and gets an IP address dynamically then sooner or later you will get problems trying to host a Directory Server with this approach.
Also, ping xpbox.mydummydomain.com beforehand, just to make sure that computer doesnt already exist. grin

Cannot resolve name

Hi:
I am trying to install Sun One Directory Distribution version 5.2 on my computer.
My computer name is "albertlam".
My workgroup is "workgroup2".
I tried the following for fully qualified computer name:
albertlam.workgroup2
But it gives me an error:cannot resolve name
Yours,
Frustrated.

Hi,
Your issue is that you are not able to resolve the DNS name.
and more over you have not given the correct fully qualified computer name:
To find the same right click on your 'my computer' and reach properties and you'll see a tab 'network identification' and i that you can see your fully qualified computer name.
copy the same and use in place..it should hopefully work.

VPN and limiting internet access

I posted this under the SMB as well but wanted to post under the VPN header at the same time.
Hello all, I am very new to VPN's and Firewalls so please forgive me for lack of terminology usage.
I am part of a company that has 20 internal PC's and 25 external sites (Convienient stores) that are all now being placed on a VPN. We purchased a ASA 5510 for the office and we are placing Linksys RV042 routers at the stores. What my question is, is that we have a few stores that need limited internet access because we have Subway restaurants there and they need to download and upload at times. What I dont want is to allow full access to the net because of the chance of outside attacks or viruses.
My question is, what can be done to set the VPN in place but only allow certain access to web addresses that we say is alright to have communication with?
Is this possible and / or what else needs to be purchased?
I thank you in advance for any help you can advise on.
JJ

The problem with the internet is, how do you define this 'certain' addresses. Is this possible for you?
There is an option in VPNs called split tunneling, which has a "Exclude specified" mode, that might help.
Regards\
Farrukh

HT1725 42404 error after downloading itunes (20+ times!) can access the itunes store but can't do any downloads... itunes support has not offered any valid suggestions

42404 error after downloading itunes (20+ times!) can access the itunes store but can't do any downloads... itunes support has not offered any valid suggestions

This is EXACTLY what happened to me and many others. Tech support returned most of my money but not all of it. Figure that one out! It is clear no music is downloaded (or in queue), it is clear an unknown error message is produced, and it is clear we, the consumer, are still being charged anyway. Will Apple require a credit card from its customers and alienate those that do not wish to use a credit card? Will Apple insult its customers and make silly suggestions such as 'Use an iTunes gift card' in much the same way a forum moderator has already recommended?
I have an idea: Acknowledge the problem publicly (via email, for example) and fix it in a future update. Customers will be more understanding if they know there is a temporary problem and Apple is working hard to fix it. Oh, and return our money, please!
Windows XP Pro
Windows XP Pro

TS4002 when I was assigned my ".me accounts.... I used the name of the company that I worked for. Then I received a iCloud account. The problem is I want to change the two original names but can't because they're greyed out. Is there anything I can do?

When I was assigned my ".me accounts I used the name of the company that I worked for. Then I received a iCloud account. The problem is I want to change the two original names but can't because they're greyed out. Is there anything I can do?
Thanks in advance,
Majormidi

http://discussions.apple.com/thread.jspa?messageID=3366422
Odd, the link works for me.
-mj
[email protected]

HT4061 i have cellular data internet connectivity (no wi-fi) but can't download and install software updates

i have cellualr data internet connectivity (no wi-fi) but can't download and install software updates. how can i update the software?

i have cellualr data internet connectivity (no wi-fi) but can't download and install software updates. how can i update the software?

HT201441 I restored my iPhone 5 to a back up on my brothers iMac ..now I have access to the phone but can't turn off the find my phone with the owner of the account I backed my phone to .. What can I do to solve this issue??

I restored my iPhone 5 to a back up on my brothers iMac ..now I have access to the phone but can't turn off the find my phone with the owner of the account I backed my phone to .. What can I do to solve this issue??

You sould be able to sync both ways. Check your default calendar on your phone by going to Settings>Mail,Contacts,Calendars>scroll down to the calendars section to Default Calendar. Check to be sure you have selected your mac calendar as your default (and not, for example, On My iPhone). Then enter a new event on your phone and sync to confirm that it appears on your mac.

Extend Wireless Network using a Telstra technicolor Gateway wireless Router to Airpot extreme but Airport will only except join not extend and I can not get a network on the Airpor Extreme ethernet ports but can ping Airport extreme from Technicolor Rout/

Extend Wireless Network using a Telstra technicolor Gateway wireless Router to Airpot extreme but Airport will only except "join a wireless network (which it does) not "extend a wireless network" (Led turns yellow and I can not get a network working on the Airpor Extreme ethernet ports but can ping Airport extreme from Technicolor Router.
Airport gets it address DHCP.

Funny how I can ping the Extreme but the Hard Ethernet ports dont seem to work correctly.
When the AirPort Extreme is configured to "Join" a wireless network, the Ethernet ports are not enabled.
Oddly, the AirPort Express has a special feature that will allow it to to "Join" virtually any wireless network.....and the Ethernet port can be enabled. So, an Express would work for your purpose to provide an Ethernet connection to the media player. This assumes that the Express is located where it can receive a strong wireless signal from your main router.
Note that the Express will not provide any additional wireless coverage when it "Joins".

HT1414 I cannot access the internet on my home network but can on any other network

My iPad is able to access the internet on all other networks but my new home network doesn't allow me to get on.

I do not think so. It seems that this has happened to some people that use comcast. I am wondering if anyone has figured out a way to override the issue.

Cannot connect to internet on at&t 3G but can connect wirelessly. Anybody help?

Cannot connect to internet on at&t3G but can connect wirelessly. Any suggestions?

I have the exact same phone with the exact same situation. Verizon to ATT. I called att and recieved some help. I chnaged my data package to include a personal black berry service and now I have full EDGE. they also sent to my phone the service books for a bold which is the closet they have to the tour. still says that I need to contact my provider and get them to enable the browser. did you ever figure it out?

Losing internet connection but can ping severs

Hi. Something weird has been happening with my powerbook the last month. Safari, mail and skype cant access the internet suddenly. Rebooting my router does nothing, neither does logging out/in, but rebooting the pb resolves. When this happens I can still ping www addresses and ip addresses but all apps seem to lose connectivity. Anyone got a suggestion?

This resolved itself. Maybe it was a problem with my ISP

Cannot control/observe but can send commands and update apps

I've researched the discussions here and basically came up with several ways of fixing the problem. Also I see I am not the only one with this particular problem.
Ok with that said, here are the details.
I am running a G5 behind a linksys wireless router (g5 is hard wired to the ethernet port of the router), my router is set up to open ports 5900 and 3283 just for ARD 2.0. The ports are pointing to my mac's IP address given by the router. I currently use optimum online for my internet usage, so basically I have a static IP address. From work I can access my G5, control/observe, update, etc...
I also have set up ARD on my mothers imac, she sits behind a verizon dsl modem, and an old netgear router I used at one point. I have the router set up the same way, ports 5900 and 3283 are opened up for tcp and udp. From her machine I can actually connect to my G5 at home and control/observe, etc..
My main problem is when I am on the G5 and try to connect to her machine, I can only send messages, update software but cannot visually observe or control her mac. I've gone and had her change the tcp port to 10000 and no luck with control or observe. I then had her delete ARD with an application I found over the net (appdelete). I had her install ARD client and set it up from scratch again. Nothing... I have spoken with verizon IT and they aren't blocking any ports. I am at my wits end, can't figure this one out. OH, I also tried disconnecting the router and had my mother connect the dsl modem straight to the imac and still cannot control or observe. Within ARD It tells me what program she is running, etc... because of port 3283 but that's about it. I know everyone here has given alot of information. But is there something I am missing?
Could it be a hardware issue (mac or router)? or software?

I've tested timbuktu pro 8.6 and I can access my G5 at home the same way as ARD, I just had to open up the port 5901 and set up the user prefs. My only issue is going to be setting up my mothers imac with timbuktu. crossing my fingers to see if it works tonight. If there are any other thoughts out there please feel free to tell me.

Limited Internet Access -- Cannot resolve names but can ping IP addresses

Similar Messages

Maybe you are looking for