; This is a comment. ; config options go here. server: serve-expired: yes prefetch: yes forward-zone: name: "." forward-addr: 216.0.0.1 CONFIG_END SCENARIO_BEGIN Zero ttl answer needs to override servfail in cache. RANGE_BEGIN 0 100 ENTRY_BEGIN MATCH opcode qtype qname ADJUST copy_id REPLY QR RD RA SERVFAIL SECTION QUESTION www.example.com. IN A SECTION ANSWER ENTRY_END RANGE_END RANGE_BEGIN 200 300 ENTRY_BEGIN MATCH opcode qtype qname ADJUST copy_id REPLY QR RD RA NOERROR SECTION QUESTION www.example.com. IN A SECTION ANSWER www.example.com. 0 IN A 10.20.30.40 ENTRY_END RANGE_END STEP 1 QUERY ENTRY_BEGIN REPLY RD SECTION QUESTION www.example.com. IN A ENTRY_END STEP 10 CHECK_ANSWER ENTRY_BEGIN MATCH all REPLY QR RD RA SERVFAIL SECTION QUESTION www.example.com. IN A SECTION ANSWER ENTRY_END ; enough to pass by the TTL of the servfail answer in cache STEP 50 TIME_PASSES ELAPSE 5 ; this query triggers a prefetch STEP 210 QUERY ENTRY_BEGIN REPLY RD SECTION QUESTION www.example.com. IN A ENTRY_END STEP 220 CHECK_ANSWER ENTRY_BEGIN MATCH all REPLY QR RD RA SERVFAIL SECTION QUESTION www.example.com. IN A SECTION ANSWER ENTRY_END ; this query gets the 0ttl answer STEP 230 QUERY ENTRY_BEGIN REPLY RD SECTION QUESTION www.example.com. IN A ENTRY_END STEP 240 CHECK_ANSWER ENTRY_BEGIN MATCH all REPLY QR RD RA NOERROR SECTION QUESTION www.example.com. IN A SECTION ANSWER www.example.com. 0 IN A 10.20.30.40 ENTRY_END SCENARIO_END