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RES: How to block Kazaa; NIS authentication

Ok. Block a specific port is really easy... But the problem is: kazaa
tries to use the port 1214, but if it's blocked, he use other ports...
And if i block all other, it uses the port 80, that i can't block, cause
my users need web.....
I'm googling for the answer too... If i find something, i put it on the
list too.

-----Mensagem original-----
De: fedora-list-bounces redhat com
[mailto:fedora-list-bounces redhat com] Em nome de jludwig
Enviada em: quarta-feira, 5 de maio de 2004 16:40
Para: For users of Fedora Core releases
Assunto: Re: How to block Kazaa; NIS authentication

On Wed, 2004-05-05 at 15:03, Markku Kolkka wrote:
> Artur Sampaio kirjoitti viestissään (lähetysaika keskiviikko, 5.
> toukokuuta 2004 21:12):
> > 1) The W2k user insist in use kazaa, that was prohibited from 
> > enterprise's owner.....I wish to block the port of kazaa on the 
> > server (iptables??). someone knows how?
> http://www.linuxjournal.com/article.php?sid=6945
> -- 
> 	Markku Kolkka
> 	markku kolkka iki fi
Blocking a port with iptables is rather trivial. A couple of examples.

$IPTABLES -A INPUT -p udp --sport 23 -s 0/0 -j LOG --log-prefix \
"Incorrect DNS source" $IPTABLES -A INPUT -i lo --sport 631 -j ACCEPT
$IPTABLES -A FORWARD -o $EXTIF -p tcp --dport 137 -j DROP $IPTABLES -A
FORWARD -o $EXTIF -p tcp --dport 138 -j DROP $IPTABLES -A FORWARD -o
$EXTIF -p tcp --dport 139 -j DROP

See http://www.linuxguruz.com/iptables/ for more and better information
jludwig <wralphie comcast net>

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