[knot-resolver-users] Re: Resolving problem connectivity.samsung.com.cn even on dual-stack

Hello Robert, thanks for hint. The trace: curl http://localhost:8453/trace/connectivity.samsung.com.cn [iterat][4123608.00] 'connectivity.samsung.com.cn.' type 'A' new uid was assigned .01, parent uid .00 [cache ][4123608.01] => no NSEC* cached for zone: samsung.com.cn. [cache ][4123608.01] => skipping zone: samsung.com.cn., NSEC, hash 0;new TTL -123456789, ret -2 [cache ][4123608.01] => skipping zone: samsung.com.cn., NSEC, hash 0;new TTL -123456789, ret -2 [zoncut][4123608.01] found cut: samsung.com.cn. (rank 010 return codes: DS 1, DNSKEY 1) [resolv][4123608.01] => NS is provably without DS, going insecure [select][4123608.01] => id: '61652' choosing: 'dns1.esamsungchina.com.cn.'(a)'27.106.204.42#00053' with timeout 10000 ms zone cut: 'samsung.com.cn.' [resolv][4123608.01] => id: '61652' querying: 'dns1.esamsungchina.com.cn.'(a)'27.106.204.42#00053' zone cut: 'samsung.com.cn.' qname: 'coNNECTIVitY.SAMSunG.com.CN.' qtype: 'A' proto: 'tcp' [worker][4123608.01] => connecting to: '27.106.204.42#00053' [worker][4123608.01] => connection to '27.106.204.42#00053' failed (internal timeout) [select][4123608.01] => id: '61652' noting selection error: 'dns1.esamsungchina.com.cn.'(a)'27.106.204.42#00053' zone cut: 'samsung.com.cn.' error: 4 TCP_CONNECT_TIMEOUT [iterat][4123608.01] 'connectivity.samsung.com.cn.' type 'A' new uid was assigned .02, parent uid .00 [select][4123608.02] => id: '65410' choosing to resolve AAAA: ' dns1.esamsungchina.com.cn.' zone cut: 'samsung.com.cn.' [plan ][4123608.02] plan 'dns1.esamsungchina.com.cn.' type 'AAAA' uid [4123608.03] [iterat][4123608.03] 'dns1.esamsungchina.com.cn.' type 'AAAA' new uid was assigned .04, parent uid .02 [cache ][4123608.04] => no NSEC* cached for zone: esamsungchina.com.cn. [cache ][4123608.04] => skipping zone: esamsungchina.com.cn., NSEC, hash 0;new TTL -123456789, ret -2 [cache ][4123608.04] => skipping zone: esamsungchina.com.cn., NSEC, hash 0;new TTL -123456789, ret -2 [zoncut][4123608.04] found cut: esamsungchina.com.cn. (rank 010 return codes: DS 1, DNSKEY 1) [resolv][4123608.04] => NS is provably without DS, going insecure [select][4123608.04] => id: '29392' choosing: 'dns.esamsungchina.com.cn.'(a)'27.106.204.41#00053' with timeout 10000 ms zone cut: 'esamsungchina.com.cn.' [resolv][4123608.04] => id: '29392' querying: 'dns.esamsungchina.com.cn.'(a)'27.106.204.41#00053' zone cut: ' esamsungchina.com.cn.' qname: 'DNS1.ESAMsUNgchiNa.coM.cN.' qtype: 'AAAA' proto: 'tcp' [worker][4123608.04] => connecting to: '27.106.204.41#00053' [worker][4123608.04] => connection to '27.106.204.41#00053' failed (internal timeout) [select][4123608.04] => id: '29392' noting selection error: 'dns.esamsungchina.com.cn.'(a)'27.106.204.41#00053' zone cut: ' esamsungchina.com.cn.' error: 4 TCP_CONNECT_TIMEOUT [iterat][4123608.04] 'dns1.esamsungchina.com.cn.' type 'AAAA' new uid was assigned .05, parent uid .02 [cache ][4123608.05] => no NSEC* cached for zone: esamsungchina.com.cn. [cache ][4123608.05] => skipping zone: esamsungchina.com.cn., NSEC, hash 0;new TTL -123456789, ret -2 [cache ][4123608.05] => skipping zone: esamsungchina.com.cn., NSEC, hash 0;new TTL -123456789, ret -2 [select][4123608.05] => id: '16382' choosing: 'dns1.esamsungchina.com.cn.'(a)'27.106.204.42#00053' with timeout 10000 ms zone cut: 'esamsungchina.com.cn.' [resolv][4123608.05] => id: '16382' querying: 'dns1.esamsungchina.com.cn.'(a)'27.106.204.42#00053' zone cut: ' esamsungchina.com.cn.' qname: 'DNs1.esamSUNgcHiNA.COM.cn.' qtype: 'AAAA' proto: 'udp' [select][4123608.05] => id: '16382' noting selection error: 'dns1.esamsungchina.com.cn.'(a)'27.106.204.42#00053' zone cut: ' esamsungchina.com.cn.' error: 1 QUERY_TIMEOUT [worker][4123608.00] internal timeout for resolving the request has expired [resolv][4123608.00] request failed, answering with empty SERVFAIL [resolv][4123608.05] finished in state: 8, queries: 0, mempool: 114752 B po 19. 9. 2022 o 13:29 Robert Šefr <robert.sefr(a)whalebone.io> napísal(a):