I want to block Messengers like Gtalk, MSN, yahoo etc along with a lot of websites in my office. I don't want people to waste time on these and compromise the work, since we are into hosting, we need internet for all. We have squid setup in our office, but the squid does not block the messengers and also gtalk from inside gmail if gmail is accessed using https. Is there a way to do it in squid or which is the best and inexpensive option for me to do this?
