On my Readynas Duo for some time ive had a share with HTTP setup with read-only and set as the default webserver and had no issues Ive then also had a second share with read/write access over HTTP and secured with a username and password. Ive had no issues with this until today.
I wanted an 3rd share that had FTP access for myself to upload and HTTP read-only for clients to download from and keep the existing two shares as they are. But following setting this up the 3rd share 'HTTP read-only' is asking for username and password even though ive not set any, all security is left blank.
All shares enabled for HTTP access will always require a user id and password to access with the one exception of the read-only share designated as a the default web server share where you can specify the option to disable authentication if you wish.
Check the Frontview option for the default web server share to verify this - you'll see the authentication option under where you specify which share to use
