1 ; config options 2 server: 3 module-config: "validator iterator" 4 qname-minimisation: "no" 5 minimal-responses: no 6 serve-expired: yes 7 serve-expired-client-timeout: 0 8 serve-expired-reply-ttl: 123 9 ede: yes 10 ede-serve-expired: yes 11 12 13 stub-zone: 14 name: "example.com" 15 stub-addr: 1.2.3.4 16 CONFIG_END 17 18 SCENARIO_BEGIN Test serve-expired without client-timeout and a SERVFAIL upstream reply 19 ; Scenario overview: 20 ; - query for example.com. IN A 21 ; - answer from upstream is SERVFAIL; will be cached for NORR_TTL(5) 22 ; - check that the client gets the SERVFAIL; also cached 23 ; - query again right after the TTL expired 24 ; - cached SERVFAIL should be ignored and upstream queried 25 ; - answer from upstream is still SERVFAIL; the cached error response will be 26 ; refreshed for another NORR_TTL(5) 27 ; - check that the client gets the SERVFAIL 28 ; - query again; the upstream now has the answer available 29 ; - check that we get the refreshed cached response instead 30 31 ; ns.example.com. 32 RANGE_BEGIN 0 50 33 ADDRESS 1.2.3.4 34 ; response to A query 35 ENTRY_BEGIN 36 MATCH opcode qtype qname 37 ADJUST copy_id 38 REPLY QR AA SERVFAIL 39 SECTION QUESTION 40 example.com. IN A 41 ENTRY_END 42 RANGE_END 43 44 ; ns.example.com. 45 RANGE_BEGIN 60 100 46 ADDRESS 1.2.3.4 47 ENTRY_BEGIN 48 MATCH opcode qtype qname 49 ADJUST copy_id 50 REPLY QR NOERROR 51 SECTION QUESTION 52 example.com. IN NS 53 SECTION ANSWER 54 example.com. 10 IN NS ns.example.com. 55 SECTION ADDITIONAL 56 ns.example.com. 10 IN A 1.2.3.4 57 ENTRY_END 58 59 ENTRY_BEGIN 60 MATCH opcode qtype qname 61 ADJUST copy_id 62 REPLY QR NOERROR 63 SECTION QUESTION 64 example.com. IN A 65 SECTION ANSWER 66 example.com. 10 IN A 5.6.7.8 67 SECTION AUTHORITY 68 example.com. 10 IN NS ns.example.com. 69 SECTION ADDITIONAL 70 ns.example.com. 10 IN A 1.2.3.4 71 ENTRY_END 72 RANGE_END 73 74 ; Query with RD flag 75 STEP 0 QUERY 76 ENTRY_BEGIN 77 REPLY RD 78 SECTION QUESTION 79 example.com. IN A 80 ENTRY_END 81 82 ; Check that we get the SERVFAIL (will be cached) 83 STEP 10 CHECK_ANSWER 84 ENTRY_BEGIN 85 MATCH all 86 REPLY QR RD RA SERVFAIL 87 SECTION QUESTION 88 example.com. IN A 89 ENTRY_END 90 91 ; Query again 92 STEP 20 QUERY 93 ENTRY_BEGIN 94 REPLY RD 95 SECTION QUESTION 96 example.com. IN A 97 ENTRY_END 98 99 ; Check that we get the cached SERVFAIL 100 STEP 30 CHECK_ANSWER 101 ENTRY_BEGIN 102 MATCH all 103 REPLY QR RD RA SERVFAIL 104 SECTION QUESTION 105 example.com. IN A 106 ENTRY_END 107 108 ; Wait for the SERVFAIL to expire 109 STEP 31 TIME_PASSES ELAPSE 6 110 111 ; Query again 112 STEP 40 QUERY 113 ENTRY_BEGIN 114 REPLY RD 115 SECTION QUESTION 116 example.com. IN A 117 ENTRY_END 118 119 ; Check that we get the SERVFAIL (will be refreshed) 120 STEP 50 CHECK_ANSWER 121 ENTRY_BEGIN 122 MATCH all 123 REPLY QR RD RA SERVFAIL 124 SECTION QUESTION 125 example.com. IN A 126 ENTRY_END 127 128 ; Query again, upstream has the real answer available 129 STEP 60 QUERY 130 ENTRY_BEGIN 131 REPLY RD 132 SECTION QUESTION 133 example.com. IN A 134 ENTRY_END 135 136 ; Check that we get the refreshed cached SERVFAIL 137 STEP 70 CHECK_ANSWER 138 ENTRY_BEGIN 139 MATCH all 140 REPLY QR RD RA SERVFAIL 141 SECTION QUESTION 142 example.com. IN A 143 ENTRY_END 144 145 SCENARIO_END 146
Indexes created Mon Jun 01 00:24:59 UTC 2026