Linux FTP suggestion?

Well I have used a few FTP programs but I am still trying to find on that meets my needs. Can any of you recommend one that can perform the following:

1. Has "virtual users" instead of using the linux users.
2. Can restrict all file types except those that I specify.
3. Can restrict access to only the folders I specify.
4. Can bind only to an IP/Port I specify.
5. Is secure.
6. And if all possible, has a webmin module I can use for easy setup/configuration.


Basically what I want to do is offer a free CSLinux FTP suggestion? server to a clan and allow them to update their configs without having to worry about my server being compromised. Although I ask for virtual users, I want to be able to say if this virtual user uploads something make the owner of the file this user. Does anyone know of a ftp program that can do this?

 

 

 

 

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