Adding upstream version 5.6.0.upstream/5.6.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

6 files changed, 1053 insertions, 0 deletions

diff --git a/modules/rebinding/.packaging/test.config b/modules/rebinding/.packaging/test.config
new file mode 100644
index 0000000..0a84b88
--- /dev/null
+++ b/modules/rebinding/.packaging/test.config
@@ -0,0 +1,4 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+modules.load('rebinding')
+assert(rebinding)
+quit()
diff --git a/modules/rebinding/README.rst b/modules/rebinding/README.rst
new file mode 100644
index 0000000..222d1da
--- /dev/null
+++ b/modules/rebinding/README.rst
@@ -0,0 +1,29 @@
+.. SPDX-License-Identifier: GPL-3.0-or-later
+
+.. _mod-rebinding:
+
+Rebinding protection
+====================
+
+This module provides protection from `DNS Rebinding attack`_ by blocking
+answers which contain IPv4_ or IPv6_ addresses for private use
+(or some other special-use addresses).
+
+To enable this module insert following line into your configuration file:
+
+.. code-block:: lua
+
+  modules.load('rebinding < iterate')
+
+Please note that this module does not offer stable configuration interface
+yet. For this reason it is suitable mainly for public resolver operators
+who do not need to whitelist certain subnets.
+
+.. warning:: DNS Blacklists (`RFC 5782`_) often use `127.0.0.0/8` to blacklist
+   a domain. Using the rebinding module prevents DNSBL from functioning
+   properly.
+
+.. _`DNS Rebinding attack`: https://en.wikipedia.org/wiki/DNS_rebinding
+.. _IPv4: https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml
+.. _IPv6: https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml
+.. _`RFC 5782`: https://tools.ietf.org/html/rfc5782#section-2.1
diff --git a/modules/rebinding/rebinding.lua b/modules/rebinding/rebinding.lua
new file mode 100644
index 0000000..d5d6e74
--- /dev/null
+++ b/modules/rebinding/rebinding.lua
@@ -0,0 +1,115 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+local ffi = require('ffi')
+
+-- Protection from DNS rebinding attacks
+local kres = require('kres')
+local renumber = require('kres_modules.renumber')
+local policy = require('kres_modules.policy')
+
+local M = {}
+M.layer = {}
+M.blacklist = {
+	-- https://www.iana.org/assignments/iana-ipv4-special-registry
+	-- + IPv4-to-IPv6 mapping
+	renumber.prefix('0.0.0.0/8', '0.0.0.0'),
+	renumber.prefix('::ffff:0.0.0.0/104', '::'),
+	renumber.prefix('10.0.0.0/8', '0.0.0.0'),
+	renumber.prefix('::ffff:10.0.0.0/104', '::'),
+	renumber.prefix('100.64.0.0/10', '0.0.0.0'),
+	renumber.prefix('::ffff:100.64.0.0/106', '::'),
+	renumber.prefix('127.0.0.0/8', '0.0.0.0'),
+	renumber.prefix('::ffff:127.0.0.0/104', '::'),
+	renumber.prefix('169.254.0.0/16', '0.0.0.0'),
+	renumber.prefix('::ffff:169.254.0.0/112', '::'),
+	renumber.prefix('172.16.0.0/12', '0.0.0.0'),
+	renumber.prefix('::ffff:172.16.0.0/108', '::'),
+	renumber.prefix('192.168.0.0/16', '0.0.0.0'),
+	renumber.prefix('::ffff:192.168.0.0/112', '::'),
+	-- https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml
+	renumber.prefix('::/128', '::'),
+	renumber.prefix('::1/128', '::'),
+	renumber.prefix('fc00::/7', '::'),
+	renumber.prefix('fe80::/10', '::'),
+} -- second parameter for renumber module is ignored except for being v4 or v6
+
+local function is_rr_blacklisted(rr)
+	for i = 1, #M.blacklist do
+		local prefix = M.blacklist[i]
+		-- Match record type to address family and record address to given subnet
+		if renumber.match_subnet(prefix[1], prefix[2], prefix[4], rr) then
+			return true
+		end
+	end
+	return false
+end
+
+local function check_section(pkt, section)
+	local records = pkt:section(section)
+	local count = #records
+	if count == 0 then
+		return nil end
+	for i = 1, count do
+		local rr = records[i]
+		if rr.type == kres.type.A or rr.type == kres.type.AAAA then
+			local result = is_rr_blacklisted(rr)
+			if result then
+				return rr end
+		end
+	end
+end
+
+local function check_pkt(pkt)
+	for _, section in ipairs({kres.section.ANSWER,
+				  kres.section.AUTHORITY,
+				  kres.section.ADDITIONAL}) do
+		local bad_rr = check_section(pkt, section)
+		if bad_rr then
+			return bad_rr
+		end
+	end
+end
+
+local function refuse(req)
+	policy.REFUSE(nil, req)
+	local pkt = req:ensure_answer()
+	if pkt == nil then return nil end
+	pkt:aa(false)
+	pkt:begin(kres.section.ADDITIONAL)
+
+	local msg = 'blocked by DNS rebinding protection'
+	pkt:put('\11explanation\7invalid\0', 10800, pkt:qclass(), kres.type.TXT,
+	string.char(#msg) .. msg)
+	return kres.DONE
+end
+
+-- act on DNS queries which were not answered from cache
+function M.layer.consume(state, req, pkt)
+	if state == kres.FAIL then
+		return state end
+
+	local qry = req:current()
+	if qry.flags.CACHED or qry.flags.ALLOW_LOCAL then  -- do not slow down cached queries
+		return state end
+
+	local bad_rr = check_pkt(pkt)
+	if not bad_rr then
+		return state end
+
+	qry.flags.RESOLVED = 1  -- stop iteration
+	qry.flags.CACHED = 1  -- do not cache
+
+	--[[ In case we're in a sub-query, we do not touch the final req answer.
+		Only this sub-query will get finished without a result - there we
+		rely on the iterator reacting to flags.RESOLVED
+		Typical example: NS address resolution -> only this NS won't be used
+		but others may still be OK (or we SERVFAIL due to no NS being usable).
+	--]]
+	if qry.parent == nil then
+		state = refuse(req)
+	end
+	log_qry(qry, ffi.C.LOG_GRP_REBIND,
+		'blocking blacklisted IP in RR \'%s\'\n', kres.rr2str(bad_rr))
+	return state
+end
+
+return M
diff --git a/modules/rebinding/test.integr/deckard.yaml b/modules/rebinding/test.integr/deckard.yaml
new file mode 100644
index 0000000..9b1793b
--- /dev/null
+++ b/modules/rebinding/test.integr/deckard.yaml
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+programs:
+- name: kresd
+  binary: kresd
+  additional:
+    - --noninteractive
+  templates:
+    - modules/rebinding/test.integr/kresd_config.j2
+    - tests/integration/hints_zone.j2
+  configs:
+    - config
+    - hints
diff --git a/modules/rebinding/test.integr/kresd_config.j2 b/modules/rebinding/test.integr/kresd_config.j2
new file mode 100644
index 0000000..aed3551
--- /dev/null
+++ b/modules/rebinding/test.integr/kresd_config.j2
@@ -0,0 +1,59 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+{% raw %}
+-- make sure DNSSEC is turned off for tests
+trust_anchors.remove('.')
+
+-- Disable RFC5011 TA update
+if ta_update then
+        modules.unload('ta_update')
+end
+
+-- Disable RFC8145 signaling, scenario doesn't provide expected answers
+if ta_signal_query then
+        modules.unload('ta_signal_query')
+end
+
+-- Disable RFC8109 priming, scenario doesn't provide expected answers
+if priming then
+        modules.unload('priming')
+end
+
+-- Disable this module because it make one priming query
+if detect_time_skew then
+        modules.unload('detect_time_skew')
+end
+
+modules.load('rebinding < iterate')
+
+_hint_root_file('hints')
+cache.size = 2*MB
+log_level('debug')
+net.ipv6 = false
+{% endraw %}
+
+net = { '{{SELF_ADDR}}' }
+
+
+{% if QMIN == "false" %}
+option('NO_MINIMIZE', true)
+{% else %}
+option('NO_MINIMIZE', false)
+{% endif %}
+
+
+-- Self-checks on globals
+assert(help() ~= nil)
+assert(worker.id ~= nil)
+-- Self-checks on facilities
+assert(cache.count() == 0)
+assert(cache.stats() ~= nil)
+assert(cache.backends() ~= nil)
+assert(worker.stats() ~= nil)
+assert(net.interfaces() ~= nil)
+-- Self-checks on loaded stuff
+assert(net.list()[1].transport.ip == '{{SELF_ADDR}}')
+assert(#modules.list() > 0)
+-- Self-check timers
+ev = event.recurrent(1 * sec, function (ev) return 1 end)
+event.cancel(ev)
+ev = event.after(0, function (ev) return 1 end)
diff --git a/modules/rebinding/test.integr/module_rebinding.rpl b/modules/rebinding/test.integr/module_rebinding.rpl
new file mode 100644
index 0000000..1e344c5
--- /dev/null
+++ b/modules/rebinding/test.integr/module_rebinding.rpl
@@ -0,0 +1,834 @@
+; SPDX-License-Identifier: GPL-3.0-or-later
+; config options
+;	target-fetch-policy: "0 0 0 0 0"
+;	module-config: "iterator"
+;	name: "."
+	stub-addr: 193.0.14.129 	# K.ROOT-SERVERS.NET.
+CONFIG_END
+
+SCENARIO_BEGIN Test protection from DNS rebinding
+
+; K.ROOT-SERVERS.NET.
+RANGE_BEGIN 0 1000
+	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
+
+; net.
+ENTRY_BEGIN
+MATCH opcode qname
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+net. IN NS
+SECTION AUTHORITY
+.	IN SOA	. . 0 0 0 0 0
+ENTRY_END
+
+; root-servers.net.
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+root-servers.net. IN NS
+SECTION ANSWER
+root-servers.net.	IN NS	k.root-servers.net.
+SECTION ADDITIONAL
+k.root-servers.net.	IN 	A	193.0.14.129
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qname
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+root-servers.net. IN A
+SECTION AUTHORITY
+root-servers.net.	IN	SOA	. . 0 0 0 0 0
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+k.root-servers.net.	IN 	A
+SECTION ANSWER
+k.root-servers.net.	IN 	A	193.0.14.129
+SECTION ADDITIONAL
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+k.root-servers.net.	IN 	AAAA
+SECTION AUTHORITY
+root-servers.net.	IN	SOA	. . 0 0 0 0 0
+ENTRY_END
+
+; gtld-servers.net.
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+gtld-servers.net. IN NS
+SECTION ANSWER
+gtld-servers.net.	IN NS	a.gtld-servers.net.
+SECTION ADDITIONAL
+a.gtld-servers.net.	IN 	A	192.5.6.30
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qname
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+gtld-servers.net. IN A
+SECTION AUTHORITY
+gtld-servers.net.	IN	SOA	. . 0 0 0 0 0
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+a.gtld-servers.net.	IN 	A
+SECTION ANSWER
+a.gtld-servers.net.	IN 	A	192.5.6.30
+SECTION ADDITIONAL
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+a.gtld-servers.net.	IN 	AAAA
+SECTION AUTHORITY
+gtld-servers.net.	IN	SOA	. . 0 0 0 0 0
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+com. IN A
+SECTION AUTHORITY
+com.	IN NS	a.gtld-servers.net.
+SECTION ADDITIONAL
+a.gtld-servers.net.	IN 	A	192.5.6.30
+ENTRY_END
+RANGE_END
+
+; a.gtld-servers.net.
+RANGE_BEGIN 0 1000
+	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 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.		IN 	A	1.2.3.4
+ENTRY_END
+
+; NS with address pointing into a private range must not be followed
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+attacker.com. IN A
+SECTION AUTHORITY
+attacker.com.	IN NS	ns.attacker.com.
+SECTION ADDITIONAL
+ns.attacker.com.		IN 	A	192.168.3.5
+ENTRY_END
+RANGE_END
+
+; ns.attacker.com.
+RANGE_BEGIN 0 1000
+	ADDRESS 19.168.3.5
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attacker.com. IN NS
+SECTION ANSWER
+attacker.com.	IN NS	ns.attacker.com.
+SECTION ADDITIONAL
+ns.attacker.com.		IN 	A	192.168.3.5
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+www.attacker.com. IN A
+SECTION ANSWER
+www.attacker.com. IN A	192.0.2.55
+ENTRY_END
+RANGE_END
+
+
+; ns.example.com.
+RANGE_BEGIN 0 1000
+	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	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
+www.example.com. IN A
+SECTION ANSWER
+www.example.com. IN A	192.0.2.40
+ENTRY_END
+
+; blacklisted IP addresses
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4-0-0-0-0.example.com. IN A
+SECTION ANSWER
+attack-ipv4-0-0-0-0.example.com. IN A	0.0.0.0
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4over6-0-0-0-0.example.com. IN AAAA
+SECTION ANSWER
+attack-ipv4over6-0-0-0-0.example.com. IN AAAA	::ffff:0.0.0.0
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4-10-1-2-3.example.com. IN A
+SECTION ANSWER
+attack-ipv4-10-1-2-3.example.com. IN A	10.1.2.3
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4over6-10-2-3-4.example.com. IN AAAA
+SECTION ANSWER
+attack-ipv4over6-10-2-3-4.example.com. IN AAAA	::ffff:10.2.3.4
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4-100-127-255-254.example.com. IN A
+SECTION ANSWER
+attack-ipv4-100-127-255-254.example.com. IN A	100.127.255.254
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4over6-100-127-255-255.example.com. IN AAAA
+SECTION ANSWER
+attack-ipv4over6-100-127-255-255.example.com. IN AAAA	::ffff:100.127.255.255
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4-127-0-0-1.example.com. IN A
+SECTION ANSWER
+attack-ipv4-127-0-0-1.example.com. IN A	127.0.0.1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4over6-127-0-0-1.example.com. IN AAAA
+SECTION ANSWER
+attack-ipv4over6-127-0-0-1.example.com. IN AAAA	::ffff:127.0.0.1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4-169-254-255-255.example.com. IN A
+SECTION ANSWER
+attack-ipv4-169-254-255-255.example.com. IN A	169.254.255.255
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4over6-169-254-0-0.example.com. IN AAAA
+SECTION ANSWER
+attack-ipv4over6-169-254-0-0.example.com. IN AAAA	::ffff:169.254.0.0
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4-172-16-0-0.example.com. IN A
+SECTION ANSWER
+attack-ipv4-172-16-0-0.example.com. IN A	172.16.0.0
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4over6-172-31-255-255.example.com. IN AAAA
+SECTION ANSWER
+attack-ipv4over6-172-31-255-255.example.com. IN AAAA	::ffff:172.31.255.255
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4-192-168-3-8.example.com. IN A
+SECTION ANSWER
+attack-ipv4-192-168-3-8.example.com. IN A	192.168.3.8
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv4over6-192-168-254-210.example.com. IN AAAA
+SECTION ANSWER
+attack-ipv4over6-192-168-254-210.example.com. IN AAAA	::ffff:192.168.254.210
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv6-.example.com. IN AAAA
+SECTION ANSWER
+attack-ipv6-.example.com. IN AAAA	::
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv6-1.example.com. IN AAAA
+SECTION ANSWER
+attack-ipv6-1.example.com. IN AAAA	::1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv6-fc00.example.com. IN AAAA
+SECTION ANSWER
+attack-ipv6-fc00.example.com. IN AAAA	fc00::
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+attack-ipv6-fe80.example.com. IN AAAA
+SECTION ANSWER
+attack-ipv6-fe80.example.com. IN AAAA	fe80::
+ENTRY_END
+
+RANGE_END
+
+STEP 11 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; recursion happens here, no blacklisted IP address is present
+STEP 12 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	192.0.2.40
+;SECTION AUTHORITY
+;example.com.	IN NS	ns.example.com.
+;SECTION ADDITIONAL
+;ns.example.com.		IN 	A	1.2.3.4
+ENTRY_END
+
+; test that 0.0.0.0 is blacklisted
+STEP 201 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4-0-0-0-0.example.com. IN A
+ENTRY_END
+
+STEP 202 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4-0-0-0-0.example.com. IN A
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that ::ffff:0.0.0.0 is blacklisted
+STEP 211 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4over6-0-0-0-0.example.com. IN AAAA
+ENTRY_END
+
+STEP 212 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4over6-0-0-0-0.example.com. IN AAAA
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that 10.1.2.3 is blacklisted
+STEP 221 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4-10-1-2-3.example.com. IN A
+ENTRY_END
+
+STEP 222 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4-10-1-2-3.example.com. IN A
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that ::ffff:10.2.3.4 is blacklisted
+STEP 231 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4over6-10-2-3-4.example.com. IN AAAA
+ENTRY_END
+
+STEP 232 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4over6-10-2-3-4.example.com. IN AAAA
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that 100.127.255.254 is blacklisted
+STEP 241 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4-100-127-255-254.example.com. IN A
+ENTRY_END
+
+STEP 242 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4-100-127-255-254.example.com. IN A
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that ::ffff:100.127.255.255 is blacklisted
+STEP 251 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4over6-100-127-255-255.example.com. IN AAAA
+ENTRY_END
+
+STEP 252 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4over6-100-127-255-255.example.com. IN AAAA
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that 127.0.0.1 is blacklisted
+STEP 261 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4-127-0-0-1.example.com. IN A
+ENTRY_END
+
+STEP 262 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4-127-0-0-1.example.com. IN A
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that ::ffff:127.0.0.1 is blacklisted
+STEP 271 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4over6-127-0-0-1.example.com. IN AAAA
+ENTRY_END
+
+STEP 272 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4over6-127-0-0-1.example.com. IN AAAA
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that 169.254.255.255 is blacklisted
+STEP 281 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4-169-254-255-255.example.com. IN A
+ENTRY_END
+
+STEP 282 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4-169-254-255-255.example.com. IN A
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that ::ffff:169.254.0.0 is blacklisted
+STEP 291 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4over6-169-254-0-0.example.com. IN AAAA
+ENTRY_END
+
+STEP 292 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4over6-169-254-0-0.example.com. IN AAAA
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that 172.16.0.0 is blacklisted
+STEP 301 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4-172-16-0-0.example.com. IN A
+ENTRY_END
+
+STEP 302 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4-172-16-0-0.example.com. IN A
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that ::ffff:172.31.255.255 is blacklisted
+STEP 311 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4over6-172-31-255-255.example.com. IN AAAA
+ENTRY_END
+
+STEP 312 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4over6-172-31-255-255.example.com. IN AAAA
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that 192.168.3.8 is blacklisted
+STEP 321 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4-192-168-3-8.example.com. IN A
+ENTRY_END
+
+STEP 322 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4-192-168-3-8.example.com. IN A
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that ::ffff:192.168.254.210 is blacklisted
+STEP 331 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv4over6-192-168-254-210.example.com. IN AAAA
+ENTRY_END
+
+STEP 332 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv4over6-192-168-254-210.example.com. IN AAAA
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that :: is blacklisted
+STEP 341 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv6-.example.com. IN AAAA
+ENTRY_END
+
+STEP 342 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv6-.example.com. IN AAAA
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that ::1 is blacklisted
+STEP 351 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv6-1.example.com. IN AAAA
+ENTRY_END
+
+STEP 352 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv6-1.example.com. IN AAAA
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that fc00:: is blacklisted
+STEP 361 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv6-fc00.example.com. IN AAAA
+ENTRY_END
+
+STEP 362 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv6-fc00.example.com. IN AAAA
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+; test that fe80:: is blacklisted
+STEP 371 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+attack-ipv6-fe80.example.com. IN AAAA
+ENTRY_END
+
+STEP 372 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+attack-ipv6-fe80.example.com. IN AAAA
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+STEP 401 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; it still works if no blacklisted IP address is present
+STEP 402 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	192.0.2.40
+ENTRY_END
+
+STEP 501 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.attacker.com. IN A
+ENTRY_END
+
+; NS for attacker.com. has IP address from private range, it must fail
+STEP 502 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all answer authority
+REPLY QR RD RA REFUSED
+SECTION QUESTION
+www.attacker.com. IN A
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+explanation.invalid.	TXT	"blocked by DNS rebinding protection"
+ENTRY_END
+
+SCENARIO_END