I am not responsible for the login page - this is a DNN thing. Please post your question about DotNetNeuke to the DNN forum at http://www.dotnetnuke.com.
(Anyway: see Admin :: User Accounts :: User settings. You'll find the setting there.)
Best wishes
Michael
PS: Apply to all module does only apply general settings - not module specific settings. From all of your posts, I have the impression that you are a newby in DNN, IIS and .Net in general. Please read the documentations about these programs and technologies and don't post your general questions about installing and using DNN, .Net, IIS etc. to this forum. Please understand that I am only supporting my module.