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Date:      Fri, 20 Oct 2000 11:51:44 -0400
From:      James Housley <jim@thehousleys.net>
To:        Nate Williams <nate@yogotech.com>
Cc:        freebsd-hackers@FreeBSD.ORG
Subject:   Blocking Napster (WAS: IPFW bug/incoming TCP connections being let in.)
Message-ID:  <39F06A10.8643A0B0@thehousleys.net>
References:  <200010192029.OAA25357@nomad.yogotech.com> <200010201546.JAA04367@nomad.yogotech.com>

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Nate Williams wrote:
> 
> > I had blocked incoming TCP connections coming into my network using
> > IPFW, and I noticed that my brother was able to establish a Napster
> > connection, even though I had blocked it earlier.
> 
> *sigh*
> 
> Thanks to Guy Helmer for being patient with me as I fretted about this.
> 
> I just found out that Napster leaves a client running in the background,
> and even though I had added firewall rules to block new connections to
> the server, the old 'established' connection was still up and running.
> 

This might be helpful to you and others.  Since napster uses what ever
ports it can find the best way is to block the servers.

# Napster
$fwcmd add deny tcp from any to 208.178.163.56/29 via tun0
$fwcmd add deny tcp from any to 208.178.175.128/29 via tun0
$fwcmd add deny tcp from any to 208.49.239.240/28 via tun0
$fwcmd add deny tcp from any to 208.49.228.0/24 via tun0
$fwcmd add deny tcp from any to 208.184.216.0/24 via tun0

Jim
-- 
jeh@FreeBSD.org      http://www.FreeBSD.org     The Power to Serve
jim@TheHousleys.Net  http://www.TheHousleys.net
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Unix is very user-friendly.  It's just picky who its friends are.


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