I've tried searching through the archives for data transfer limits but all I can find is stuff on bandwidth limiting through the use of delay pools to restrict users to a specific transfer rate. Here is my situation. I have a Squid server on the internet that users around the world can connect to but it requires that they know their own username and password (this is not an open proxy) in order to connect. So I have this in my squid.conf: auth_param basic program /usr/lib/squid/ncsa_auth /etc/squid/passwd auth_param basic children 5 auth_param basic realm Squid proxy-caching web server auth_param basic credentialsttl 2 hours auth_param basic casesensitive off acl ncsa_users proxy_auth REQUIRED http_access allow ncsa_users /etc/squid/passwd has a list of usernames and their associated passwords. How can I limit each user to a specific amount of data transfer per month such as 100GB. I do not want to limit the rate to anything such as 64kbps. I want my users to use my full 10Mbps connection if they can but once they reach 100GB of transferred data, I want to disable them. Is this possible? Thanks