The DNS servers I use are assigned by DHCP, each of which finally auto forwards to Google DNS.
There is a big problem with changing the DNS to point directly externally, rather than use an internal one, in a corporate environment you will not be able to resolve local servers.
Not really a viable solution.
The only viable solution to this nightmare is to wait for apple to fix it, how long you want to wait is entirely up to you, but for me if a resolution hasn't been delivered 4 weeks after the launch date of Yosemite, then I'm for one going to roll back to Mavericks, possibly skipping Yosemite all-to-together, or at least until I read that a full resolution has been found.
To be honest I'm thinking about rolling back anyway as I'm not overly keen on the new look, it's almost as though Apple has lost it's style and class, once with a class comparable to Sony & Mercedes, I would say personally that they are now comparable to LG and Ford.
As previously commented on this thread, we are all clutching at straws over this matter, nothing has worked to resolve the problem, albeit some of the solutions have made life a little simpler for some, the problem always seems to return.
I dread to think of the commercial cost for business users due to this problem, I'm in a lucky environment where I still have machines on Mavericks that actually work, so it's not effected me so much.
But what with Yosemite being a free, almost forced upgrade, there must be thousands of hours wasted just due to this nasty little bug.