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</style><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";">Dear TF members,<o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";"> <o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";">Here are the minutes from our </span><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">seventh </span><span style="font-size: 10pt; font-family: "Courier New";">call.<o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";"> <o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";">Cheers,<o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";">Boris <o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";"> <o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";">***<o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";"> <o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Tuesday</span><span style="font-size: 10pt; font-family: "Courier New";">, </span><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">8 August</span><span style="font-size: 10pt; font-family: "Courier New";"> 2023 1</span><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">7</span><span style="font-size: 10pt; font-family: "Courier New";">:00 (UTC+</span><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">2</span><span style="font-size: 10pt; font-family: "Courier New";">)<o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";"> <o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";">Attendees: </span><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Marteen Aertsen, </span><span lang="EN-GB" style="font-size: 10pt; font-family: "Courier New";">Shane Kerr, Andronikos Kyriakou, Tim Wicinski</span><span style="font-size: 10pt; font-family: "Courier New";"><o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";"> <o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";">Scribe: Boris Duval <o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";"><br></span></p><p class="MsoNormal" style="font-size: medium;"><span style="font-size: 10pt; font-family: "Courier New";"><br></span></p><p class="MsoListParagraph" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l1 level1 lfo1"><!--[if !supportLists]--><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-font-family:"Courier New";
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:#0C00;mso-fareast-language:
EN-GB">1.<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Recommended Knobs Settings </span><span style="font-size: 10pt; font-family: "Courier New";"><o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">The Task Force discussed recommendations for specific DNS settings:<br></span><span lang="EN-GB"><a href="https://github.com/DNS-Resolver-BCP-TF/Resolver-Recommendations/issues/10"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">https://github.com/DNS-Resolver-BCP-TF/Resolver-Recommendations/issues/10</span></a></span><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";"><o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";"><br></span></p><p class="MsoNormal" style="font-size: medium;"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Here’s a summary:<o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";"><br></span></p><p class="MsoNormal" style="font-size: medium;"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">DNSSEC Validation:<o:p></o:p></span></p><p class="MsoListParagraphCxSpFirst" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l4 level1 lfo2;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Recommended enabling DNSSEC validation.<o:p></o:p></span></p><p class="MsoListParagraphCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l4 level1 lfo2;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Negative caching (NSEC, NSEC3) reduces traffic, safeguards against random subdomain attacks (RFC 8198).<o:p></o:p></span></p><p class="MsoListParagraphCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l4 level1 lfo2;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Root KSK update essential; RFC 5011 or resolver operator for updates via OS.<o:p></o:p></span></p><p class="MsoListParagraphCxSpLast" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l4 level1 lfo2;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Valuable material in RFC9364 for DNSSEC operations.<o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">TTL Limits (max & min):<o:p></o:p></span></p><p class="MsoListParagraphCxSpFirst" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l0 level1 lfo3;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Software default TTL of 1-2 days; potential reduction for cache size.<o:p></o:p></span></p><p class="MsoListParagraphCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l0 level1 lfo3;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Lower TTL removes infrequently-used records, minimal operational impact, memory savings.<o:p></o:p></span></p><p class="MsoListParagraphCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l0 level1 lfo3;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Some implementations allow minimum TTL, though a DNS protocol violation.<o:p></o:p></span></p><p class="MsoListParagraphCxSpLast" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l0 level1 lfo3;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Software can set differing max/min TTL, impacting queries.<o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">TTL Record Pre-fetch:<o:p></o:p></span></p><p class="MsoListParagraphCxSpFirst" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l3 level1 lfo4;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Certain resolvers prefetch records before cache expiration to extend TTL.<o:p></o:p></span></p><p class="MsoListParagraphCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l3 level1 lfo4;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Feature not standardized; related proposal: </span><span lang="EN-GB"><a href="https://datatracker.ietf.org/doc/html/draft-wkumari-dnsop-hammer-03" target="_new"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New"; color: windowtext; text-decoration: none;">https://datatracker.ietf.org/doc/html/draft-wkumari-dnsop-hammer-03</span></a></span><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";"><o:p></o:p></span></p><p class="MsoListParagraphCxSpLast" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l3 level1 lfo4;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Recommended enabling if available. <o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Cache Saving:<o:p></o:p></span></p><p class="MsoListParagraph" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l2 level1 lfo5;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Exploring downsides; input sought from implementors, DNS OARC list.<o:p></o:p></span></p><p class="MsoNormal" style="font-size: medium;"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Local Root (and maybe local TLD?):<o:p></o:p></span></p><p class="MsoListParagraphCxSpFirst" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l2 level1 lfo5;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Beneficial to use local root (RFC8806).<o:p></o:p></span></p><p class="MsoListParagraphCxSpLast" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l2 level1 lfo5;tab-stops:
list 36.0pt"><!--[if !supportLists]--><span lang="EN-US" style="font-size:10.0pt;
font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;
mso-font-kerning:0pt;mso-ligatures:none;mso-ansi-language:EN-US;mso-fareast-language:
EN-GB">·<span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"> </span></span><!--[endif]--><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Not applicable to most TLDs due to frequent changes.<o:p></o:p></span></p><p class="MsoListParagraphCxSpLast" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-add-space:auto;text-indent:-18.0pt;mso-list:l2 level1 lfo5;tab-stops:
list 36.0pt"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";"><br></span></p><p class="MsoNormal" style="font-size: medium;"><span lang="EN-US" style="font-size: 10pt; font-family: "Courier New";">Shane offered to develop these notes and come up with a first draft.<o:p></o:p></span></p></body></html>