I'm not sure if DNS is the correct approach to resolve this issue, but here's the situation.
We have a couple of sites that use integrated authentication (sharepoint for example). When a user attempts to access the site from a non domain computer they will receive the generic login popup window. These users are typically wireless guests which are on a separate subnet. I'd like to direct those users to a TMG / ADFS proxy page that utilizes FBA authentication.
All subnets use the same DNS servers and I do not want to add a new one. Is there a way to make that subnet resolve to another address or somehow do a redirect in IIS?
All dns / DHCP servers are windows 2012
Any help would be appreciated.