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I'm having problems with the DNS resolution after a wakeup from sleep. The system I'm running is Mac OS X Lion 10.7, and I am properly connected to my Wifi.

When I issue a ping google.com in the Terminal, it just works. But going through any browser or Application that requires internet access, they all can't resolve the hostname.

I can solve this issue by going to System Preferences > Network Settings and I deactive/activate my Wifi. After that everything works again.

Where else can I look into to solve this permanently?

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I'm experiencing the exact same problem. I'm starting to think that this is a virus of some sort, but am unable to find anything conclusive. I've "favorited" this question. Hopefully someone will chime in with something useful soon! Very oddly it's specific to google.com. I'm not on Lion, I'm still on 10.6, so, it's not an OS specific issue. –  Dr.Dredel Dec 2 '11 at 8:17

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