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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Apologies if this was answered before.<o:p></o:p></p><p class=MsoNormal>In router advertisements, is there a way to declare one prefix deprecated without deprecating the others?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Here’s my situation.<o:p></o:p></p><p class=MsoNormal>I’ve been using the dnsmasq option<o:p></o:p></p><p class=MsoQuote>dhcp-range=set:lan,::,constructor:br-lan,ra-stateless,ra-names,12h<o:p></o:p></p><p class=MsoNormal>to announce a dynamic IPv6 prefix delegated from an ISP, and life was beautiful ever since.<o:p></o:p></p><p class=MsoNormal>However, my ISP doesn’t delegate reverse DNS, so I obtained an additional IPv6 prefix delegated from a tunnel broker.<o:p></o:p></p><p class=MsoNormal>Since certain online services block connections from the tunnel broker, I’ll need systems to avoid selecting addresses in that prefix as the source address when initiating connections.<o:p></o:p></p><p class=MsoNormal>According to <a href="https://tools.ietf.org/html/rfc6724#section-5">RFC 6724</a>, announcing addresses in that prefix as deprecated will cause an appropriate selection.<o:p></o:p></p><p class=MsoNormal>I don’t see an obvious way to selectively deprecate one prefix and not others in <a href="http://www.thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html">the manual</a>.<o:p></o:p></p><p class=MsoNormal>I’ve tried adding the line<o:p></o:p></p><p class=MsoQuote>dhcp-range=set:lan,2001:db8::,ra-stateless,ra-names,deprecated<o:p></o:p></p><p class=MsoNormal>where <em><span style='font-family:"Calibri",sans-serif'>2001:db8::</span></em> would be the prefix delegated from the tunnel broker.<o:p></o:p></p><p class=MsoNormal>However,<o:p></o:p></p><ul style='margin-top:0in' type=disc><li class=MsoNormal style='mso-list:l2 level1 lfo3'>the router advertises twice, differently<o:p></o:p></li></ul><p class=MsoQuote>router advertisement on 2001:db8::<o:p></o:p></p><p class=MsoQuote>router advertisement on 2001:db8::, constructed for br-lan<o:p></o:p></p><ul style='margin-top:0in' type=disc><li class=MsoNormal style='mso-list:l2 level1 lfo3'>DNS records list addresses from that prefix twice.<o:p></o:p></li></ul><p class=MsoNormal><span style='font-family:Consolas'>$ dig hostname any<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:Consolas'>;; ANSWER SECTION:<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:Consolas'>hostname. 0 IN A 192.168.0.39<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:Consolas'>hostname. 0 IN AAAA fd64:cd08:2045::2<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:Consolas'>hostname. 0 IN AAAA 2001:db8::2<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:Consolas'>hostname. 0 IN AAAA 2001:db8::2<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is there a way to control advertisement options on 1 prefix without affecting the others?<o:p></o:p></p><p class=MsoNormal>Thanks.<o:p></o:p></p></div></body></html>