Catching user switching and getting current active user from root on linux

[Emile van Sebille]

On 12/22/2010 11:28 AM mpnordland said...
> ok, I'll give one more chance.

... which probably won't be enough -- this is potentially a huge 
question you're asking with lots of little bits to put together.  I have 
an installation where I did somthing similar seven-ish years ago using 
squid, squidguard, blacklists from Université Toulouse in France, 
python, iptables, sql, php, zope, bash, and who knows what else.  It 
authenticates, logs, tracks, blocks, unblocks, reports activity on an 
automated In and Out board by user, provides historical stats, automates 
new user setup and invalidation, and probably more.  I put maybe a week 
or two into it initially, and about the same again over the years adding 
to it.

> First, to pacify those who hate google groups: What is a good usenet
> client?

I use thunderbird to access gmane groups.

> second, How should I set up this proxy so that when a connection is
> made, it request's authentication, and then log's the request, if
> authentication is not gotten, how do I have it block (or firewall) the
> request? Furthermore, I would like for the proxy to be squid. So all
> of the nitty gritty should have to do with squid.

... and that's where I'd start looking.  Check out the current status of 
Squid to see how much of what you want can be done out of the box.  When 
you hit the limits of what it'll do for you, start writing glue to fill 
in the puzzle.

HTH,

Emile