FTP website in IIS with anonymous authentication requires username and password

Question

I have a FTP website in IIS 8 that I want to expose to public (non-authenticated visitors) that is configured using the following settings from here:

• No SSL
• Authentication: Anonymous (Basic authentication is disabled)
• Allow access to: Anonymous Users
• Read permission selected

Whenever I try to connect to the website externally using the ftp://mysite.com address, I am always prompted with a dialog that says:

Authentication Required - The server ftp://mysite.com:21 requires a username and password

I've tried every credentials (even for the users that have read permissions to folder that the website is pointing to) and still nothing. Basic Authentication is disabled for the website.

How can I configure the FTP site in order to allow external read access for any visitor?

PS: it is okay even with a solution that implies Basic Authentication in place since I can provide the users with an account on the server for my purposes, but even with Basic Authentication enabled and providing the correct credentials, it failed to authenticate.

Regards, Ionut

Answer 1

Four things to check:

1. FTP Authentication->Anonymous Authentication->Enable, then edit, User:IUSR Pass:<blank>
2. FTP Authorization Rules->All Anonymous Users->Read

3. FTP User Isolation->Do not isolate. Start in: FTP root directory

4. Add the "IUSR" account to the root directory NTFS Security Permissions with Read, Read and Execute, and List Folder Contents.