<font color='black' size='2' face='arial'> <div> <font size="2"><font face="Arial, Helvetica, sans-serif">Most bittorrent clients are no longer using standard ports. Blocking it without knowing what port it will be on requires some sophisticated packet inspection. Comcast was using 3rd party software to do this and injecting session termination packets into the stream to disrupt the connections. I don't remember the name of </font></font><font size="2"><font face="Arial, Helvetica, sans-serif">this comcastic </font></font><font size="2"><font face="Arial, Helvetica, sans-serif">software but you can google it. This solution will not be cheap however so you have to really NEED to block it to be worth the cost. AFAIK, the only way you can do it is to have a white list of ports and/or client machines for your proxy to filter. This will have marginal success as I have busted this blockade myself on many occasions. Also, this approach won't stop bittorrent through tunneling which can pretty much get around anything you do as long as you have an open connection. Probably the best you can do is take the simple route like AT&T and impose draconian bandwidth limits.</font></font><br> </div> <div> <br> </div> -----Original Message-----<br> From: shali Kallumpuram <vidyaserveradmin@gmail.com><br> To: ubuntu-users@lists.ubuntu.com<br> Sent: Fri, Oct 30, 2009 8:16 am<br> Subject: IPTABLES Help<br> <br> <div id="AOLMsgPart_3_8f4a8457-963a-4e52-9fd0-fce5a7e9f50e"> Dear all,<br> <br> i need help in blocking bittorent files downloading through proxi, we are using squid proxi, any help??/<br> <br> <br> Shali K R <br> </div>  <div id="AOLMsgPart_4_8f4a8457-963a-4e52-9fd0-fce5a7e9f50e" style="margin: 0px; font-family: Tahoma,Verdana,Arial,Sans-Serif; font-size: 12px; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);"> <pre style="font-size: 9pt;"><tt>-- <br> ubuntu-users mailing list<br> <a href="mailto:ubuntu-users@lists.ubuntu.com">ubuntu-users@lists.ubuntu.com</a><br> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-users</a><br> </tt></pre> </div>  </font>