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Fix a DNS resolution failure
Authored by: Dimka on Dec 21, '09 02:31:17PM

I had the same issue on three of my laptops that were upgraded to 10.6 in various places, at home, at my friends house.
I tried the following (with no success)
* Reset my router
* Reset my cable modem
* Disabled WPA/WEP protection
* Changed security protocol from WEP to WPA/WPA2
* Switched wireless channels Ė pick a channel no neighbor is using.
* Turned Airport on & off (via menu or Network preferences)
* Deleted and then recreate/reestablish wireless network connection
* Created a new Network Location
* Made sure your router firmware and Airport card firmware is up to date
* Zaped the PRAM on your Mac (hold Command+Option+P+R on restart)
* Flushed the DNS cache using the Terminal command: dscacheutil -flushcache
* Deleted the and files from ~/Library/Preferences
* Trashed my home directories SystemConfiguration folder and reboot
* Reset my Macís System Management Controller (SMC)

All those steps have helped a bit, but problem remained.
After all it turned out that thorough troubleshooting DNS settings in the routers fixed it.
My conclusion that it is a collective fault of IPS, router makers and Apple, who never tested their stuff well. The problem is really widespread, I found hunderds of calls for help from desperate snow leopard users.

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