<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><BR><DIV><DIV>On 10 Aug 2005, at 16:48, Michiel van Baak wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">On 08:45, Wed 10 Aug 05, Jean-Michel Hiver wrote:</DIV> <BR><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">1) your provider is voluntarily screwing up VoIP traffic</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">2) some idiot purposingly fills up your pipe with UDP traffic</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV> <BR></BLOCKQUOTE><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">If they fill the pipe with TCP traffic, UDP will be dead as</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">well. Protocols don't matter, bandwidth does.</DIV></BLOCKQUOTE><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Actually they do. A smart router/firewall can manage inbound </DIV><DIV>TCP traffic by delaying or dropping outbound acks. This will cause any</DIV><DIV>correct TCP implementation to back off.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Clearly this isn't perfect, it won't help you if you are being DOS'd</DIV><DIV>but it will throttle inbound http/smtp.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Tim.</DIV><BLOCKQUOTE type="cite"></BLOCKQUOTE></DIV><BR><BR><DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica"><A href="http://www.westhawk.co.uk">http://www.westhawk.co.uk</A>/</FONT></DIV> </DIV><BR></BODY></HTML>