I'm using OS X Mountain Lion. I'm using
dnsmasq to set up wildcard localhost domain names, such as http://local.dev, to point to localhost. But I have to add 127.0.0.1 in my system preference -> network settings.
After I set up 127.0.0.1 as the DNS server, the ISP's default DNS servers were over wrote by mine. This was preventing me from accessing websites. It's not a big deal when I don't move my computer, I could manually enter the ISP's DNS server. But if I change places, the ISP's DNS changes.
I also tried to use google's DNS server, but it's not working in some instance. How can I reserve (or update) the ISP's DNS server without deleting 127.0.0.1 as a DNS.
Thank you in advance.