This revision includes some changes in response to Peter van Dijk's DNS directorate review, as well as addressing the left over "for discussion" topics. Although our conversation with Peter may still be ongoing, we wanted to get this version out so that other people can review the document as a whole in the meantime.
DW On 6/30/23, 1:31 PM, "DNSOP on behalf of internet-dra...@ietf.org <mailto:internet-dra...@ietf.org>" <dnsop-boun...@ietf.org <mailto:dnsop-boun...@ietf.org> on behalf of internet-dra...@ietf.org <mailto:internet-dra...@ietf.org>> wrote: A New Internet-Draft is available from the on-line Internet-Drafts directories. This Internet-Draft is a work item of the Domain Name System Operations (DNSOP) WG of the IETF. Title : Negative Caching of DNS Resolution Failures Authors : Duane Wessels William Carroll Matthew Thomas Filename : draft-ietf-dnsop-caching-resolution-failures-04.txt Pages : 16 Date : 2023-06-30 Abstract: In the DNS, resolvers employ caching to reduce both latency for end users and load on authoritative name servers. The process of resolution may result in one of three types of responses: (1) a response containing the requested data; (2) a response indicating the requested data does not exist; or (3) a non-response due to a resolution failure in which the resolver does not receive any useful information regarding the data's existence. This document concerns itself only with the third type. RFC 2308 specifies requirements for DNS negative caching. There, caching of type (1) and (2) responses is mandatory and caching of type (3) responses is optional. This document updates RFC 2308 to require negative caching for DNS resolution failures. The IETF datatracker status page for this Internet-Draft is: https://secure-web.cisco.com/1OwCImNw2PA9Wo17Q8aEqLytC1RP0oGi5WKJ41cpxQEKEw9VZiJHDBhotEYwUHPYl3ivi2kLtVCc7kPZpcO15J3V5-aTcxuQiCjyw_pxY7V0tA9UZ9RFG5hVrhtDubS_b_Bv5a2aNz6f-4ifEzDyN2OuXvANkhxT1O-lKZ0zb01GgYSta2d6mqCbdbPwVk_jQKdnbbNnJlOczz96StIidL6s4mHuk3X0daekc4QilkS8TuPwqmvlPH0HmhFBQ4dZHZBWccKjFwIk_nWSYcG5RbAz6DgwD8O950v_xL33wFBQ/https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-dnsop-caching-resolution-failures%2F <https://secure-web.cisco.com/1OwCImNw2PA9Wo17Q8aEqLytC1RP0oGi5WKJ41cpxQEKEw9VZiJHDBhotEYwUHPYl3ivi2kLtVCc7kPZpcO15J3V5-aTcxuQiCjyw_pxY7V0tA9UZ9RFG5hVrhtDubS_b_Bv5a2aNz6f-4ifEzDyN2OuXvANkhxT1O-lKZ0zb01GgYSta2d6mqCbdbPwVk_jQKdnbbNnJlOczz96StIidL6s4mHuk3X0daekc4QilkS8TuPwqmvlPH0HmhFBQ4dZHZBWccKjFwIk_nWSYcG5RbAz6DgwD8O950v_xL33wFBQ/https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-dnsop-caching-resolution-failures%2F> There is also an htmlized version available at: https://secure-web.cisco.com/1DpyEyJ5UqQFPgxeVLmSp_8DqEXGgk5Px9g_3lIEl--fuiQgSF6ch9RJy6voDPXIGgu5OCVaQwFKn5QZiTh_iW4enizK-nvIqJiSyT07kziDZyptRX54oBrJDpxL0r_jcpnHn26BhMu0g9hAc_OKykYY0ZC68WrJ6CRnvo-CVHUDesdXWMC7IpjjgPCGZ2BhPHCL7osOXd5JNZa9yL2iWAs3JpybcRPibEB_2HXjkP9rwj2RbRHMey0MpYZ7_bLZeRMOFTuarXvvlKKpxEbHQ4caGkrH8oIarGDjDuzNQrH0/https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dnsop-caching-resolution-failures-04 <https://secure-web.cisco.com/1DpyEyJ5UqQFPgxeVLmSp_8DqEXGgk5Px9g_3lIEl--fuiQgSF6ch9RJy6voDPXIGgu5OCVaQwFKn5QZiTh_iW4enizK-nvIqJiSyT07kziDZyptRX54oBrJDpxL0r_jcpnHn26BhMu0g9hAc_OKykYY0ZC68WrJ6CRnvo-CVHUDesdXWMC7IpjjgPCGZ2BhPHCL7osOXd5JNZa9yL2iWAs3JpybcRPibEB_2HXjkP9rwj2RbRHMey0MpYZ7_bLZeRMOFTuarXvvlKKpxEbHQ4caGkrH8oIarGDjDuzNQrH0/https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dnsop-caching-resolution-failures-04> A diff from the previous version is available at: https://secure-web.cisco.com/1bn_iNzpDhB2yHSrxPja5HjIbPI2Q4Bx67XzycqYhmNca_Xh3xzm_O_QgEcCQRgNNKLBT1jjuLk2_lpMH5tzoD8b5Fa_QzA7yspSzRtUEI6XcOOqtzvuypRbsHyXJnFJys5d6RTC1boPX0r6yRRm0U2-3qOaiza1kXVf0AK3Aco0liOnqS_VyTbq6Y0QDhJT9cI4tKHokH38M9hlx_ZlAlYZ1V7eCnV-YOPcVMqSs_XBvBVeQN1NRPrtYu6WyrsG4xzxya5ZpGQNChlDwTKLpHoZXNRO-KAg4Eo6W6nbCTtY/https%3A%2F%2Fauthor-tools.ietf.org%2Fiddiff%3Furl2%3Ddraft-ietf-dnsop-caching-resolution-failures-04 <https://secure-web.cisco.com/1bn_iNzpDhB2yHSrxPja5HjIbPI2Q4Bx67XzycqYhmNca_Xh3xzm_O_QgEcCQRgNNKLBT1jjuLk2_lpMH5tzoD8b5Fa_QzA7yspSzRtUEI6XcOOqtzvuypRbsHyXJnFJys5d6RTC1boPX0r6yRRm0U2-3qOaiza1kXVf0AK3Aco0liOnqS_VyTbq6Y0QDhJT9cI4tKHokH38M9hlx_ZlAlYZ1V7eCnV-YOPcVMqSs_XBvBVeQN1NRPrtYu6WyrsG4xzxya5ZpGQNChlDwTKLpHoZXNRO-KAg4Eo6W6nbCTtY/https%3A%2F%2Fauthor-tools.ietf.org%2Fiddiff%3Furl2%3Ddraft-ietf-dnsop-caching-resolution-failures-04> Internet-Drafts are also available by rsync at rsync.ietf.org::internet-drafts _______________________________________________ DNSOP mailing list DNSOP@ietf.org <mailto:DNSOP@ietf.org> https://secure-web.cisco.com/10Davxpn2GVxfE0qHaASfSIn5r6yAI_Hb6JiPqMhZ1oEuXN7L-4OymURDpVqHQLCSSJI5bnBGrhR5_fnzzkyP9LiJToGfSvqvEzCCM83VaCZdDcwa9ctBVg7dZQtRJVxDy9t3Eotezt_gua4AKVd1KtF-WAbHqRK9VUyKSnl7XaeAKPnMTfp8Ad-FcffBbdqN0sNf6E9_jnQxf0xIeHtDzWTKuBe7jwNDb0aakGuUgi8StmEZ0sPrues_Fy_PL2cbf2XiUIS2OuMnWBr-zpRqjhTVKdhZpGut5IspWRDXBTI/https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2Fdnsop <https://secure-web.cisco.com/10Davxpn2GVxfE0qHaASfSIn5r6yAI_Hb6JiPqMhZ1oEuXN7L-4OymURDpVqHQLCSSJI5bnBGrhR5_fnzzkyP9LiJToGfSvqvEzCCM83VaCZdDcwa9ctBVg7dZQtRJVxDy9t3Eotezt_gua4AKVd1KtF-WAbHqRK9VUyKSnl7XaeAKPnMTfp8Ad-FcffBbdqN0sNf6E9_jnQxf0xIeHtDzWTKuBe7jwNDb0aakGuUgi8StmEZ0sPrues_Fy_PL2cbf2XiUIS2OuMnWBr-zpRqjhTVKdhZpGut5IspWRDXBTI/https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2Fdnsop> _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
