RE: stop audio streams

["Jason Beauford" <jmbeauford () hotmail com>]

One way I have found effective is not to block the audio streams themselves, 
but rather the RADIO LISTING Streams.  Run an ethereal sessions between some 
of the internet radio clients (Winamp, Real Player, Itunes etc..) and your 
router.  You should see connections made to specific sites as the program 
loads.  When this happens it is downloading an XML file which lists the 
radio channels available.  Block access to that site and you will cause the 
program to error out.  Effectively stopping the radio communications.

Now if the user has any bookmarked, you're out of luck.  Also wont work if 
they go to websites that stream over port 80, like some radio station 
websites do.  But again, I've had great success with the solution I 
mentioned.

Good Luck.

JMB

> From: Jared Lyvers <jared () lewiscommunications com>
> To: security-basics () securityfocus com
> Subject: stop audio streams
> Date: Tue, 2 Aug 2005 16:17:14 -0500
>
> I was wondering if anyone new of a way to block all online radio / audio
> streams w/ iptables.
>
> I am currently only blocking itunes ( due to the amount of OSX users )
> w/ the following:
> iptables -t nat -I POSTROUTING --destination 17.254.4.130 -j DROP
>
> I tried blocking the ports that it used but some stations will also use
> port 80 so I didn't want to block that due to its use for standard
> websites.  However, I know that a few people have tried to get other
> programs ie. audion in order to by pass the itunes rule I have in place.
>
> Is there a better solution for this that I am overlooking?  Would
> blocking shoutcast, Icecast or any others be as simple as blocking a
> port number or range.
>
> Thanks,
> JL
>
> --
>
> // Jared Lyvers
> // ---------------------------
> // Director of Interactive
> // Director of IT
> // ---------------------------
> // www.lewiscommunications.com
> // 205  .  980  .  0774