While configuring our SharePoint environment for APPS we Created a Generic/Blank Web Application as I was getting 404 error until I created the blank web app on port 80
But after that i am getting the below alert in health analyzer
"A default zone url is pointing to the machine name of a web front end. Since this installation has more than one web front end, this can result in a variety of errors including incorrect links and failed operations."
Also from time to time we are having strange issues in our SharePoint like the web sites open fine in IE 11 but in Chrome we will get 401 Unauthorized and according to this technet blog "https://social.technet.microsoft.com/Forums/sharepoint/en-US/dbd7563e-52e7-4456-9102-74c9e4766646/can-not-access-sharepoint-2013-site-i-am-getting-401-unauthorized?forum=sharepointadmin" they suggest to keep the "IP address is in the Alternate Access Mapping collection for your site"
Can you suggest if that's valid approach and the errors we are having are related with AAM configuration ?