Here's the story.
There's a local sharepoint server called brksharepoint at ip address 10.2.1.40.
I had set up my computer to use google's dns because I found it to be more reliable than my local isp.
Using an app that had recently been set up I was getting 401 errors, I couldn't figure out why as I was logged into the local domain and it should have 'just worked'.
Browsing to the ip address "10.2.1.40" worked (however it prompted me for my user credentuals when I am logged into the local domain) and browsing to the computer name brksharepoint in ie 10 failed with a 404.
I then edited my hosts file to resolve to the correct ip address as I thought this was the problem - this fixed nothing.
Here's where it gets weird.
I found I could ping brksharepoint (with a wiped hosts file), and tried browsing with chrome... this worked, where ie would fail.
I then turned off google's dns and used my local gateway instead - magically this fixed everything.
What's going on here? Can I use google dns if I want to use this sharepoint server?
Thanks for any ideas - more curious than anything.