File: iter_ns_spoof.rpl

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; config options
server:
	harden-referral-path: yes
	target-fetch-policy: "0 0 0 0 0"
stub-zone:
	name: "."
	stub-addr: 193.0.14.129 	# K.ROOT-SERVERS.NET.
CONFIG_END

SCENARIO_BEGIN Test NS record spoof protection.

; K.ROOT-SERVERS.NET.
RANGE_BEGIN 0 100
	ADDRESS 193.0.14.129 
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
. IN NS
SECTION ANSWER
. IN NS	K.ROOT-SERVERS.NET.
SECTION ADDITIONAL
K.ROOT-SERVERS.NET.	IN	A	193.0.14.129
ENTRY_END

ENTRY_BEGIN
MATCH opcode subdomain
ADJUST copy_id copy_query
REPLY QR NOERROR
SECTION QUESTION
com.	IN NS
SECTION AUTHORITY
com.	IN NS	a.gtld-servers.net.
SECTION ADDITIONAL
a.gtld-servers.net.	IN 	A	192.5.6.30
ENTRY_END

; for simplicity the root server is authoritative for root-servers.net
; and also for gtld-servers.net
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR AA NOERROR
SECTION QUESTION
K.ROOT-SERVERS.NET.	IN	A
SECTION ANSWER
K.ROOT-SERVERS.NET.	IN	A	193.0.14.129
ENTRY_END

ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR AA NOERROR
SECTION QUESTION
a.gtld-servers.net.	IN 	A
SECTION ANSWER
a.gtld-servers.net.	IN 	A	192.5.6.30
ENTRY_END

RANGE_END

; a.gtld-servers.net.
RANGE_BEGIN 0 100
	ADDRESS 192.5.6.30
ENTRY_BEGIN
MATCH opcode subdomain
ADJUST copy_id copy_query
REPLY QR NOERROR
SECTION QUESTION
example.com.	IN NS
SECTION AUTHORITY
example.com.	IN NS	ns.example.com.
SECTION ADDITIONAL
ns.example.com.		IN 	A	1.2.3.4
ENTRY_END

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
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
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A	10.20.30.40
SECTION AUTHORITY
example.com.	IN NS	ns.example.com.
SECTION ADDITIONAL
ns.example.com.		IN 	A	1.2.3.4
ENTRY_END

ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
mail.example.com. IN A
SECTION ANSWER
mail.example.com. IN A	10.20.30.50
SECTION AUTHORITY
example.com.	IN NS	ns.example.com.
SECTION ADDITIONAL
ns.example.com.		IN 	A	1.2.3.4
ENTRY_END

ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR AA NOERROR
SECTION QUESTION
example.com. IN NS
SECTION ANSWER
example.com.	IN NS	ns.example.com.
SECTION ADDITIONAL
ns.example.com.		IN 	A	1.2.3.4
ENTRY_END

ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR AA NOERROR
SECTION QUESTION
ns.example.com. IN A
SECTION ANSWER
ns.example.com.		IN 	A	1.2.3.4
SECTION AUTHORITY
example.com.	IN NS	ns.example.com.
ENTRY_END

;; answer to the spoofed query ; spoofed reply answer.
; here we put it in the nameserver for ease.
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
bad123.example.com. IN A
SECTION ANSWER
bad123.example.com. IN A	6.6.6.6
SECTION AUTHORITY
; evil NS set.
example.com.	IN NS	bad123.example.com.
ENTRY_END

RANGE_END

; evil server
RANGE_BEGIN 0 100
	ADDRESS 6.6.6.6
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A	6.6.6.6
SECTION AUTHORITY
example.com.	IN NS	bad123.example.com.
SECTION ADDITIONAL
bad123.example.com. IN A	6.6.6.6
ENTRY_END

ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
mail.example.com. IN A
SECTION ANSWER
mail.example.com. IN A	6.6.6.6
SECTION AUTHORITY
example.com.	IN NS	bad123.example.com.
SECTION ADDITIONAL
bad123.example.com. IN A	6.6.6.6
ENTRY_END

ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
bad123.example.com. IN A
SECTION ANSWER
bad123.example.com. IN A	6.6.6.6
SECTION AUTHORITY
; evil NS set.
example.com.	IN NS	bad123.example.com.
ENTRY_END
RANGE_END

STEP 1 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
www.example.com. IN A
ENTRY_END

; recursion happens here.
STEP 10 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A	10.20.30.40
SECTION AUTHORITY
example.com.	IN NS	ns.example.com.
SECTION ADDITIONAL
ns.example.com.		IN 	A	1.2.3.4
ENTRY_END

; spoofed query
STEP 20 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
bad123.example.com. IN A
ENTRY_END

; recursion happens here.
STEP 30 CHECK_ANSWER
ENTRY_BEGIN
; no matching here, just accept the answer to the spoofed query.
; it is wrong, but only one query ...
; this test is to check further on, that we still have the right nameserver.
;MATCH all
REPLY QR RD RA NOERROR
SECTION QUESTION
bad123.example.com. IN A
SECTION ANSWER
bad123.example.com. IN A	6.6.6.6
SECTION AUTHORITY
example.com.	IN NS	ns.example.com.
SECTION ADDITIONAL
ns.example.com.		IN 	A	1.2.3.4
ENTRY_END

; a new query 
STEP 40 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
mail.example.com. IN A
ENTRY_END

STEP 50 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA NOERROR
SECTION QUESTION
mail.example.com. IN A
SECTION ANSWER
mail.example.com. IN A 	10.20.30.50
SECTION AUTHORITY
example.com.	IN NS	ns.example.com.
SECTION ADDITIONAL
ns.example.com.		IN 	A	1.2.3.4
ENTRY_END

SCENARIO_END