[Cpanel Blog] symlinks to files not owned by the user July,2012

What do I need to enable in cpanel to prevent users from creating symlinks to files they dont own?
symlinks to files not owned by the user
[Cpanel Blog] Add new User or what May,2012

[Cpanel Blog] How to set retraction on uploading file type or extensions? July,2012

Hi,

I want to limit only files with approved extensions such as ".gif", ".jpeg", ".doc", etc. are allowed to be uploaded to the web server. This is vitally important for my server's security, since the web server might attempt to execute or specially process files with extensions like ".php", ".cgi", etc.

Anybody can advice how and where can I set / configure to set restriction to upload file according to below Logic:

# Deny All File extension
# Except : .gif , .jpg , .pdf , .png.

Any help is highly appreciated.
How to set retraction on uploading file type or extensions?
[Cpanel Blog] Incomplete SSL Chain problem in Firefox June,2012