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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>I believe they have a similar option but you will have to ask the Bind mailing list.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thanks, S<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> McGhee, Karen (Evolver) [mailto:Karen.Mcghee@USPTO.GOV] <br><b>Sent:</b> Wednesday, January 16, 2013 1:42 AM<br><b>To:</b> Stephan Lagerholm; dns-operations@lists.dns-oarc.net<br><b>Subject:</b> RE: [dns-operations] Can you force your IPv4/v6 DNS server to return v4 responses only on recursive lookups<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:#1F497D'>I should have said, the name server is BIND 9.8 running on RHEL5.5.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>k<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Stephan Lagerholm [<a href="mailto:stephan.lagerholm@secure64.com">mailto:stephan.lagerholm@secure64.com</a>] <br><b>Sent:</b> Tuesday, January 15, 2013 3:09 PM<br><b>To:</b> McGhee, Karen (Evolver); <a href="mailto:dns-operations@lists.dns-oarc.net">dns-operations@lists.dns-oarc.net</a><br><b>Subject:</b> RE: [dns-operations] Can you force your IPv4/v6 DNS server to return v4 responses only on recursive lookups<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:#1F497D'>Hi Karen,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>There are a few vendors (disclaimer I work for one of them) that has implemented a “disable-aaaa-on-v4-transport” feature that might be able to do what you are looking for.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>You can google for ‘yahoo dns hack’ to get more info.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>/Stephan<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:dns-operations-bounces@lists.dns-oarc.net">dns-operations-bounces@lists.dns-oarc.net</a> <a href="mailto:[mailto:dns-operations-bounces@lists.dns-oarc.net]">[mailto:dns-operations-bounces@lists.dns-oarc.net]</a> <b>On Behalf Of </b>McGhee, Karen (Evolver)<br><b>Sent:</b> Wednesday, January 16, 2013 1:22 AM<br><b>To:</b> <a href="mailto:dns-operations@lists.dns-oarc.net">dns-operations@lists.dns-oarc.net</a><br><b>Subject:</b> [dns-operations] Can you force your IPv4/v6 DNS server to return v4 responses only on recursive lookups<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal>Is it possible to configure my IPv4/IPv6 DNS server to return v4 queries only when doing recursive lookups? <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>k<o:p></o:p></p></div></div></div></body></html>