2022-06-29 15:31:23 +00:00
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|
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; Check if fallback to the parent side works when MAX_TARGET_NX is reached.
|
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server:
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module-config: "iterator"
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trust-anchor-signaling: no
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|
target-fetch-policy: "0 0 0 0 0"
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verbosity: 3
|
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access-control: 127.0.0.1 allow_snoop
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qname-minimisation: no
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minimal-responses: no
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rrset-roundrobin: no
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stub-zone:
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name: "."
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stub-addr: 193.0.14.129 # K.ROOT-SERVERS.NET.
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CONFIG_END
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SCENARIO_BEGIN Test the NXNS fallback
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; K.ROOT-SERVERS.NET.
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RANGE_BEGIN 0 100
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|
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ADDRESS 193.0.14.129
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ENTRY_BEGIN
|
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|
|
MATCH opcode qtype qname
|
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|
|
ADJUST copy_id
|
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|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
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|
. IN NS
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|
|
SECTION ANSWER
|
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|
. IN NS K.ROOT-SERVERS.NET.
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|
|
SECTION ADDITIONAL
|
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|
|
K.ROOT-SERVERS.NET. IN A 193.0.14.129
|
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|
|
ENTRY_END
|
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|
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|
|
ENTRY_BEGIN
|
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|
|
MATCH opcode qtype subdomain
|
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|
|
ADJUST copy_id copy_query
|
|
|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
example.com. IN A
|
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|
|
|
SECTION AUTHORITY
|
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|
com. IN NS a.gtld-servers.net.
|
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|
|
SECTION ADDITIONAL
|
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|
a.gtld-servers.net. IN A 192.5.6.30
|
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|
ENTRY_END
|
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|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH opcode subdomain
|
|
|
|
|
ADJUST copy_id copy_query
|
|
|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
nonexistant.com. IN A
|
|
|
|
|
SECTION AUTHORITY
|
|
|
|
|
com. IN NS a.gtld-servers.net.
|
|
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|
|
SECTION ADDITIONAL
|
|
|
|
|
a.gtld-servers.net. IN A 192.5.6.30
|
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|
|
|
ENTRY_END
|
|
|
|
|
RANGE_END
|
|
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|
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|
|
; a.gtld-servers.net.
|
|
|
|
|
RANGE_BEGIN 0 100
|
|
|
|
|
ADDRESS 192.5.6.30
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH opcode qtype qname
|
|
|
|
|
ADJUST copy_id
|
|
|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
com. IN NS
|
|
|
|
|
SECTION ANSWER
|
|
|
|
|
com. IN NS a.gtld-servers.net.
|
|
|
|
|
SECTION ADDITIONAL
|
|
|
|
|
a.gtld-servers.net. IN A 192.5.6.30
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH opcode qtype subdomain
|
|
|
|
|
ADJUST copy_id copy_query
|
|
|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
example.com. IN A
|
|
|
|
|
SECTION AUTHORITY
|
|
|
|
|
example.com. IN NS ns.example.com.
|
|
|
|
|
SECTION ADDITIONAL
|
|
|
|
|
ns.example.com. 10 IN A 1.2.3.4
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH opcode subdomain
|
|
|
|
|
ADJUST copy_id copy_query
|
|
|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
nonexistant.com. IN A
|
|
|
|
|
SECTION AUTHORITY
|
|
|
|
|
nonexistant.com. IN NS ns.example.com.
|
|
|
|
|
SECTION ADDITIONAL
|
|
|
|
|
ns.example.com. 10 IN A 1.2.3.4
|
|
|
|
|
ENTRY_END
|
|
|
|
|
RANGE_END
|
|
|
|
|
|
|
|
|
|
; ns.example.com.
|
|
|
|
|
RANGE_BEGIN 0 100
|
|
|
|
|
ADDRESS 1.2.3.4
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH opcode qtype qname
|
|
|
|
|
ADJUST copy_id
|
|
|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
example.com. IN NS
|
|
|
|
|
SECTION ANSWER
|
|
|
|
|
example.com. IN NS ns1.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns2.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns3.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns4.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns5.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns6.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns7.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns8.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns9.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns10.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns11.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns12.nonexistant.com.
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH opcode qtype qname
|
|
|
|
|
ADJUST copy_id
|
|
|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
ns.example.com. IN A
|
|
|
|
|
SECTION ANSWER
|
|
|
|
|
ns.example.com. 10 IN A 1.2.3.4
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH opcode qtype qname
|
|
|
|
|
ADJUST copy_id
|
|
|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
ns.example.com. IN AAAA
|
2023-02-09 08:56:40 +00:00
|
|
|
SECTION AUTHORITY
|
|
|
|
|
example.com. IN SOA ns.example.com. root.example.com. 4 14400 3600 604800 3600
|
2022-06-29 15:31:23 +00:00
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH opcode subdomain
|
|
|
|
|
ADJUST copy_id copy_query
|
|
|
|
|
REPLY QR NXDOMAIN
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
nonexistant.com. IN A
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH opcode qtype qname
|
|
|
|
|
ADJUST copy_id
|
|
|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
a.example.com. IN A
|
|
|
|
|
SECTION ANSWER
|
|
|
|
|
a.example.com. IN A 10.20.30.40
|
|
|
|
|
SECTION AUTHORITY
|
|
|
|
|
example.com. IN NS ns1.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns2.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns3.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns4.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns5.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns6.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns7.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns8.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns9.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns10.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns11.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns12.nonexistant.com.
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH opcode qtype qname
|
|
|
|
|
ADJUST copy_id
|
|
|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
b.example.com. IN A
|
|
|
|
|
SECTION ANSWER
|
|
|
|
|
b.example.com. IN A 10.20.30.40
|
|
|
|
|
SECTION AUTHORITY
|
|
|
|
|
example.com. IN NS ns1.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns2.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns3.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns4.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns5.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns6.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns7.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns8.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns9.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns10.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns11.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns12.nonexistant.com.
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH opcode qtype qname
|
|
|
|
|
ADJUST copy_id
|
|
|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
c.example.com. IN A
|
|
|
|
|
SECTION ANSWER
|
|
|
|
|
c.example.com. IN A 10.20.30.40
|
|
|
|
|
SECTION AUTHORITY
|
|
|
|
|
example.com. IN NS ns1.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns2.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns3.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns4.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns5.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns6.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns7.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns8.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns9.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns10.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns11.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns12.nonexistant.com.
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH opcode qtype qname
|
|
|
|
|
ADJUST copy_id
|
|
|
|
|
REPLY QR NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
d.example.com. IN A
|
|
|
|
|
SECTION ANSWER
|
|
|
|
|
d.example.com. IN A 10.20.30.40
|
|
|
|
|
SECTION AUTHORITY
|
|
|
|
|
example.com. IN NS ns1.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns2.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns3.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns4.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns5.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns6.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns7.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns8.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns9.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns10.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns11.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns12.nonexistant.com.
|
|
|
|
|
ENTRY_END
|
|
|
|
|
RANGE_END
|
|
|
|
|
|
|
|
|
|
STEP 1 QUERY
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
REPLY RD
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
a.example.com. IN A
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
; This was resolved by asking the parent side nameservers
|
|
|
|
|
STEP 2 CHECK_ANSWER
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH all
|
|
|
|
|
REPLY QR RD RA NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
a.example.com. IN A
|
|
|
|
|
SECTION ANSWER
|
|
|
|
|
a.example.com. IN A 10.20.30.40
|
|
|
|
|
SECTION AUTHORITY
|
|
|
|
|
example.com. IN NS ns1.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns2.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns3.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns4.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns5.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns6.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns7.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns8.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns9.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns10.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns11.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns12.nonexistant.com.
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
; The child side nameservers are now known to Unbound
|
|
|
|
|
|
|
|
|
|
; Query again, the child server nameservers will be asked now
|
|
|
|
|
STEP 3 QUERY
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
REPLY RD
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
b.example.com. IN A
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
; This was resolved by falling back to the parent side nameservers
|
|
|
|
|
STEP 4 CHECK_ANSWER
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH all
|
|
|
|
|
REPLY QR RD RA NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
b.example.com. IN A
|
|
|
|
|
SECTION ANSWER
|
|
|
|
|
b.example.com. IN A 10.20.30.40
|
|
|
|
|
SECTION AUTHORITY
|
|
|
|
|
example.com. IN NS ns1.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns2.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns3.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns4.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns5.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns6.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns7.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns8.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns9.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns10.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns11.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns12.nonexistant.com.
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
; Query a third time, this will get the cached NXDOMAINs (no NX counter for
|
|
|
|
|
; those) and will go to the parent as a last resort. This query will test that
|
|
|
|
|
; we will not have resolution for the lame(parent side) addresses that could
|
|
|
|
|
; raise the NX counter because of no address addition to the delegation point
|
|
|
|
|
; (the same addresses are already there).
|
|
|
|
|
STEP 5 QUERY
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
REPLY RD
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
c.example.com. IN A
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
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; This was resolved by going back to the parent side nameservers (child side
|
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|
; was exhausted from cache and queries < MAX_TARGET_NX).
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|
STEP 6 CHECK_ANSWER
|
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ENTRY_BEGIN
|
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|
MATCH all
|
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|
|
REPLY QR RD RA NOERROR
|
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|
|
|
SECTION QUESTION
|
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|
|
|
c.example.com. IN A
|
|
|
|
|
SECTION ANSWER
|
|
|
|
|
c.example.com. IN A 10.20.30.40
|
|
|
|
|
SECTION AUTHORITY
|
|
|
|
|
example.com. IN NS ns1.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns2.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns3.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns4.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns5.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns6.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns7.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns8.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns9.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns10.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns11.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns12.nonexistant.com.
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
; Allow for the nameserver glue to expire
|
|
|
|
|
STEP 10 TIME_PASSES ELAPSE 11
|
|
|
|
|
|
|
|
|
|
; Query again for the parent side fallback
|
|
|
|
|
STEP 11 QUERY
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
REPLY RD
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
d.example.com. IN A
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
; This was resolved by falling back to the parent side nameservers
|
|
|
|
|
STEP 12 CHECK_ANSWER
|
|
|
|
|
ENTRY_BEGIN
|
|
|
|
|
MATCH all
|
|
|
|
|
REPLY QR RD RA NOERROR
|
|
|
|
|
SECTION QUESTION
|
|
|
|
|
d.example.com. IN A
|
|
|
|
|
SECTION ANSWER
|
|
|
|
|
d.example.com. IN A 10.20.30.40
|
|
|
|
|
SECTION AUTHORITY
|
|
|
|
|
example.com. IN NS ns1.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns2.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns3.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns4.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns5.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns6.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns7.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns8.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns9.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns10.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns11.nonexistant.com.
|
|
|
|
|
example.com. IN NS ns12.nonexistant.com.
|
|
|
|
|
ENTRY_END
|
|
|
|
|
|
|
|
|
|
SCENARIO_END
|
