On Wed, 3 Mar 2004, Emiel van Kalken wrote:

> I blocked access to all ftp sites, by putting a hash in front of the
> port 21 line in squid.conf.

This is better done by denying access to the ftp protocol

acl ftp protocol ftp
http_access deny ftp

> There is one user who needs access to one specific ftp site. Is it
> possible to just allow access to this one site and still deny all access
> to all other ftp traffic?

Then extend the above like

acl ftp protocol ftp
acl ftp_users src x.x.x.x
http_access deny ftp !ftp_users

This needs to be before where you allow access in http_access.