<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Dec 17, 2016 at 12:34 AM, Eric S. Raymond <span dir="ltr"><<a href="mailto:esr@thyrsus.com" target="_blank">esr@thyrsus.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div id="gmail-:un" class="gmail-a3s gmail-aXjCH gmail-m159087cabbda71b7">All the multicast stuff is now gone, client and server side both. My<br>
original plan was to keep multicast server just in case, though I can<br>
find zero evidence anywhere of production use. But it turned out to<br>
be too entangled with things we wanted to drop. Daniel's comment from<br>
his infosec perch was "Good riddance."<br>
<br>
I would have been more worried about dropping these things, but it<br>
seems to me from search-engining the issue that to the extent<br>
automatic server discovery was ever actually used in Unix-land, those<br>
use cases have largely been taken over by pool-style DNS<br>
round-robining.</div></blockquote></div><br></div><div class="gmail_extra">Can I clarify:<br></div><div class="gmail_extra">This 'multicast' is not necessarily the same as the IANA addresses, 224.0.1.1 and FF0X::101. <br><br><br><a href="http://doc.ntp.org/4.1.1/confopt.htm">http://doc.ntp.org/4.1.1/confopt.htm</a> says:<br><span style="color:rgb(0,0,0);font-family:monospace;font-size:13.3333px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline;float:none"></span></div><div class="gmail_extra"><span style="color:rgb(0,0,0);font-family:"times new roman";font-size:medium;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline;float:none">The NTP multicast address 224.0.1.1 assigned by the IANA should NOT be used, unless specific means are taken to avoid spraying large areas of the Internet with these messages<br><br></span><div><div class="gmail_signature"><a href="https://docs.ntpsec.org/latest/discover.html">https://docs.ntpsec.org/latest/discover.html</a><br></div><div class="gmail_signature">does not have this section, of course.<br><br></div><div class="gmail_signature">On my IPv6-enabled server, the ntpsec by default does not seem to be listening to 224.0.1.1 , and ::101 <br></div><div class="gmail_signature">-- <br>Sanjeev Gupta<br>+65 98551208 <a href="http://www.linkedin.com/in/ghane" target="_blank">http://www.linkedin.com/in/ghane</a></div></div>
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