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Reply With QuoteThey're probably being auto-populated by your router. Try changing the DNS settings in your router/modem.
The Answer to Mac Support 
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Thread: Remove DNS servers.
- July 20th, 2010, 05:41 AM #1
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Remove DNS servers.
In my active System Preferences / Network / Advanced / DNS, there are two servers listed first, ahead of a local machine and the OpenDNS servers. I would like to remove them, but I can't - they are grayed out.
I know what they are and where they came from, but why can't I delete them?iMac 21.5" 2.7 Ghz Intel Core i5, 8 gb, 1 tb
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- July 20th, 2010, 08:45 AM #2
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- July 20th, 2010, 09:58 AM #3
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Nope. I rechecked that my router serves up DHCP but does not provide DNS servers. I don't recall why I set it up that why. Currently I configure each LAN node manually to use one LAN machine as DNS server. It runs BIND and forwards requests out to OpenDNS.
iMac 21.5" 2.7 Ghz Intel Core i5, 8 gb, 1 tb
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- July 27th, 2010, 11:56 AM #4
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You probably need to clear your DNS cache if the router is just using the ISP supplied server and you are not using any custom settings in the Network pane.
Don't be afraid of the command line (/Applications/Utilities/Terminal)! Just flush your OS X dNS cache in Terminal with the command: dscacheutil -flushcache
Then restart.Mac Pro Dual 2.8 Quad (2nd gen), 14G Ram, Two DVD-RW Drives, OS X 10.8.3
2006 Mac Book Pro 2.16 (first Gen) OS X 10.7.4
2TB Time Capsule, 2 TB
32G iPhone 4S Black, iPad (3rd Gen) 32G Black
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