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10.5: Disable DHCP-specified DNS servers
Authored by: rpaege on Jul 31, '08 03:35:32PM

Excellent hint and thread. This problem has confounded me since Sprint's DNS servers refused to resolve properly to a common news site, I complained to Sprint, and they did eventually fix it, but not before telling me it was Apple's fault and that I had to dump my cache. They were, of course, completely in the wrong and they figured that out eventually.

In a recent OS X admin course, I brought up this issue. I as told that even in versions prior to 10.5 that it still used the DHCP-supplied DNS as this was a spec of DHCP. I was not able to verify this, but I have tinkered a bit on my corporate network (using 10.4.11) and have found that I can in fact change my servers, but the DHCP DNS still shows up in the list (using "cat /etc/resolv.conf"). My servers show up first though, so this leads me to believe that it may be a spec of DHCP, but it is easy to override - until leopard.

Thanks for the great advice! Apple needs to address this issue and stop denying it can't do anything about it.

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