Hello all, I have to setup a system that required to block users access internet in work time but let them access internet on specified time window e.g lunch time. I plan to use iptables and squid to do block and web caching but I have no idea how to control access on time frame. Could any one of you experienced with this can give some starting point /document/howto start reading ? My firewal/proxy box will be CentOS 5.2 so I prefer something that can install via yum/rpm Thanks in advance!