Thanks Flavio. Also I'm from Brazil ...
I am researching the subject and if you think back to post the list.
If I wanted to keep in touch feel comfortable.

Obrigado Flávio. Também sou do Brasil...
Estou a pesquisar sobre o assunto e se achar volto a postar na lista.
Caso queria manter contato sinta-se a vontade.

Em Seg, 2010-04-19 às 02:35 +0000, Flavio Machado escreveu:
> I think you can try to do something with RECENT.
> 
>  Like marking the first packet and redirecting the traffic to a SQUID
> server with transparent proxy and some kind of redirector answering
> the
> same page always (squidguard, for example).
> 
>  Than you can have another rule checking the mark (must be at least
> one
> line BEFORE the RECENT mark rule) and allowing the traffic.
> 
>  Problem is you cannot have the RECENT mark forever or else people
> would
> only see the warning message once (after every restart, of course). To
> counter this establish a timeout long enough for the entire work hours
> and
> maybe 1 hour more.
> 
>  I'm too tired to try to map this on shorewall now, please forgive me
> for
> not implementing it myself.  I'm sure someone better than me can try
> to
> help you more.
> 
> Flavio Machado
> Brasil 


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