Mac some websites not available
Posted by: admin in Mac Repair, tags: available, DNS, Mac, websitesQUESTION:
Last night my internet connection went down. (Both my wife’s and mine computers at the same time.)
Mac OS X v10.4.? (updated to the most recent) PowerMac Dual 2.0
Mac Mini OS X v10.4.? (also current) Intel Mac
I thought maybe I had to turn off the router and that would fix it. No luck there.
I called Verizon FIOS tech support and I reset the router. (pushing the little button in the back) Still no luck. They say everything is ok according to their systems and there is no problem in my area. They said to call Apple. :sigh:
I can:
- ping websites using the Terminal
- ping websites logging into the router
- I can chat using Adium
- I can send email using Thunderbird
- I can access my gmail account (sent test emails back and forth to it from home email.)
- I can access photoshoptechniques.com and google (and gmail)
I Cannot:- access any other web pages
I rebuilt Permissions but nothing changed.
I searched google but got frustrated since the first several pages did not help and I couldn’t get any of them to load.
Has anyone heard of something like this?
Any help would be greatly appreciated.
ANSWER:
I recommend (and clients have had great results) AppleJack for monthly maintenance and problem solving.
http://applejack.sourceforge.net/
Info about AppleJack
http://www.pcworld.com/printable/art…printable.html
http://www.macfixit.com/article.php?…05041817191411
Among other things, AppleJack deletes caches. If you have a damaged cache that has to do with browser history…
One possibility is that your DNS setting is corrupt or has been modified.
Check your Network settings (ethernet or wireless)
Some high level Domain Name Servers are
Level7 4.2.2.2 and 4.2.2.1
OpenDNS 208.67.222.222 and 208.67.220.220
https://www.opendns.com/homenetwork/start
When troubleshooting internet problems
Start with computer, then router and then cable/dsl modem/router turn off in that order
Computer to wall.
Go the opposite direction and wait for the led’s to stablize, powerup next device…
Another troubleshooting step is to setup a TEST user in Accounts in System Preferences.
Logout and login as TEST user, test, if it works, there is probably a preference (plist in user/library/preferences that is damaged.
AppleJack DOES Delete the DNS Cache
SEE http://forums.macosxhints.com/showthread.php?t=66160
The DNS Cache Flush Command (Panther Tiger)
Once you go to a Web site, or do any DNS lookup, the IP gets cached for quite a while. This becomes a royal pain if you’re a systems administrator who is in the middle of migrating domains from one server to another. Executing
sudo killall lookupd lookupd -flushcache
clears the cache, restarts the caching daemon, and fetches fresh DNS records. And there was much rejoicing…
Leopard (Mac OS X 10.5) command has changed to dscacheutil -flushcache and lookupd has been deprecated.
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