DHCP Security Leak

[Chuck Anderson]

On Wed, May 02, 2007 at 09:15:15AM -0400, guru.bidari at sirvisetti.com wrote:
> We are using the server to ftp it to the directory and permissions are set
> properly for each indivisual users. The problem we think it is a leak that
> another user on a different pc can get the output of that request, because
> that pc has leased the IP-address.

Through what protocol does the user get the output?  How is that 
protocol authenticated?