diff --git a/bin/named/server.c b/bin/named/server.c
index 6857416a4d..5c46598bc4 100644
--- a/bin/named/server.c
+++ b/bin/named/server.c
@@ -700,8 +700,9 @@ configure_view_nametable(const cfg_obj_t *vconfig, const cfg_obj_t *config,
 }
 
 static isc_result_t
-dstkey_fromconfig(const cfg_obj_t *vconfig, const cfg_obj_t *key,
-		  bool managed, dst_key_t **target, isc_mem_t *mctx)
+dstkey_fromconfig(dns_view_t *view, const cfg_obj_t *vconfig,
+		  const cfg_obj_t *key, bool managed, dst_key_t **target,
+		  isc_mem_t *mctx)
 {
 	dns_rdataclass_t viewclass;
 	dns_rdata_dnskey_t keystruct;
@@ -793,6 +794,14 @@ dstkey_fromconfig(const cfg_obj_t *vconfig, const cfg_obj_t *key,
 	CHECK(dst_key_fromdns(keyname, viewclass, &rrdatabuf,
 			      mctx, &dstkey));
 
+	if (!dns_resolver_algorithm_supported(view->resolver, keyname, alg)) {
+		cfg_obj_log(key, named_g_lctx, ISC_LOG_WARNING,
+			    "%s key for '%s': algorithm is disabled",
+			    managed ? "managed" : "trusted", keynamestr);
+		result = DST_R_UNSUPPORTEDALG;
+		goto cleanup;
+	}
+
 	*target = dstkey;
 	return (ISC_R_SUCCESS);
 
@@ -850,9 +859,9 @@ load_view_keys(const cfg_obj_t *keys, const cfg_obj_t *vconfig,
 		     elt2 = cfg_list_next(elt2))
 		{
 			key = cfg_listelt_value(elt2);
-			result = dstkey_fromconfig(vconfig, key, managed,
+			result = dstkey_fromconfig(view, vconfig, key, managed,
 						   &dstkey, mctx);
-			if (result ==  DST_R_UNSUPPORTEDALG) {
+			if (result == DST_R_UNSUPPORTEDALG) {
 				result = ISC_R_SUCCESS;
 				continue;
 			}
@@ -10584,7 +10593,7 @@ add_zone_tolist(dns_zone_t *zone, void *uap) {
 	struct zonelistentry *zle;
 
 	zle = isc_mem_get(dctx->mctx, sizeof *zle);
-	if (zle ==  NULL)
+	if (zle == NULL)
 		return (ISC_R_NOMEMORY);
 	zle->zone = NULL;
 	dns_zone_attach(zone, &zle->zone);
diff --git a/bin/tests/system/dnssec/README b/bin/tests/system/dnssec/README
index c45bd71f23..df83eb14e2 100644
--- a/bin/tests/system/dnssec/README
+++ b/bin/tests/system/dnssec/README
@@ -17,3 +17,6 @@ key for the root.  It is used for testing failure cases.
 ns6 is a caching-only server configured to use DLV.
 
 ns7 is used for checking non-cacheable answers.
+
+ns8 is a caching-only server, configured with unsupported and disabled
+algorithms.  It is used for testing failure cases.
diff --git a/bin/tests/system/dnssec/clean.sh b/bin/tests/system/dnssec/clean.sh
index b561b0c2cd..2010bada16 100644
--- a/bin/tests/system/dnssec/clean.sh
+++ b/bin/tests/system/dnssec/clean.sh
@@ -33,7 +33,7 @@ rm -f ./ns*/*.nta
 rm -f ./ns*/managed-keys.bind* ./ns*/*.mkeys*
 rm -f ./ns*/named.lock
 rm -f ./ns1/managed.key.id
-rm -f ./ns1/root.db ./ns2/example.db ./ns3/secure.example.db
+rm -f ./ns1/root.db ./ns2/example.db ./ns2/managed.db ./ns2/trusted.db
 rm -f ./ns2/algroll.db
 rm -f ./ns2/badparam.db ./ns2/badparam.db.bad
 rm -f ./ns2/cdnskey-kskonly.secure.db
@@ -49,6 +49,8 @@ rm -f ./ns2/in-addr.arpa.db
 rm -f ./ns2/nsec3chain-test.db
 rm -f ./ns2/private.secure.example.db
 rm -f ./ns2/single-nsec3.db
+rm -f ./ns3/secure.example.db ./ns3/*.managed.db ./ns3/*.trusted.db
+rm -f ./ns3/unsupported.managed.db.tmp ./ns3/unsupported.trusted.db.tmp
 rm -f ./ns3/auto-nsec.example.db ./ns3/auto-nsec3.example.db
 rm -f ./ns3/badds.example.db
 rm -f ./ns3/dname-at-apex-nsec3.example.db
diff --git a/bin/tests/system/dnssec/ns1/root.db.in b/bin/tests/system/dnssec/ns1/root.db.in
index 5ad5d9ef1d..7fdbab9c4e 100644
--- a/bin/tests/system/dnssec/ns1/root.db.in
+++ b/bin/tests/system/dnssec/ns1/root.db.in
@@ -8,12 +8,12 @@
 ; information regarding copyright ownership.
 
 $TTL 300
-. 			IN SOA	gson.nominum.com. a.root.servers.nil. (
-				2000042100   	; serial
-				600         	; refresh
-				600         	; retry
-				1200    	; expire
-				600       	; minimum
+.			IN SOA	gson.nominum.com. a.root.servers.nil. (
+				2000042100	; serial
+				600		; refresh
+				600		; retry
+				1200		; expire
+				600		; minimum
 				)
 .			NS	a.root-servers.nil.
 a.root-servers.nil.	A	10.53.0.1
@@ -22,8 +22,12 @@ example.		NS	ns2.example.
 ns2.example.		A	10.53.0.2
 dlv.			NS	ns2.dlv.
 ns2.dlv.		A	10.53.0.2
-algroll			NS	ns2.algroll
+algroll.		NS	ns2.algroll.
 ns2.algroll.		A	10.53.0.2
+managed.		NS	ns2.managed.
+ns2.managed.		A	10.53.0.2
+trusted.		NS	ns2.trusted.
+ns2.trusted.		A	10.53.0.2
 optout-tld		NS	ns6.optout-tld.
 ns6.optout-tld.		A	10.53.0.6
 in-addr.arpa.		NS	ns2.example.
diff --git a/bin/tests/system/dnssec/ns1/sign.sh b/bin/tests/system/dnssec/ns1/sign.sh
index 313b03c1de..4df96bf1e0 100644
--- a/bin/tests/system/dnssec/ns1/sign.sh
+++ b/bin/tests/system/dnssec/ns1/sign.sh
@@ -22,6 +22,8 @@ zonefile=root.db
 (cd ../ns6 && $SHELL sign.sh )
 (cd ../ns7 && $SHELL sign.sh )
 
+echo_i "ns1/sign.sh"
+
 cp "../ns2/dsset-example$TP" .
 cp "../ns2/dsset-dlv$TP" .
 cp "../ns2/dsset-in-addr.arpa$TP" .
diff --git a/bin/tests/system/dnssec/ns2/key.db.in b/bin/tests/system/dnssec/ns2/key.db.in
new file mode 100644
index 0000000000..60be0cf4c1
--- /dev/null
+++ b/bin/tests/system/dnssec/ns2/key.db.in
@@ -0,0 +1,40 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0. If a copy of the MPL was not distributed with this
+; file, You can obtain one at http://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 300	; 5 minutes
+@			IN SOA	mname1. . (
+				2000042407 ; serial
+				20         ; refresh (20 seconds)
+				20         ; retry (20 seconds)
+				1814400    ; expire (3 weeks)
+				3600       ; minimum (1 hour)
+				)
+			NS	ns2
+ns2			A	10.53.0.2
+
+a			A	10.0.0.1
+b			A	10.0.0.2
+d			A	10.0.0.4
+
+; A secure subdomain
+secure			NS	ns3.secure
+ns3.secure		A	10.53.0.3
+
+; A subdomain that is signed with an unsupported algorithm
+unsupported		NS	ns3.unsupported
+ns3.unsupported		A	10.53.0.3
+
+; A secure subdomain with a disabled algorithm
+disabled		NS	ns3.disabled
+ns3.disabled		A	10.53.0.3
+
+; A secure subdomain with a disabled algorithm, but not in bailiwick
+enabled			NS	ns3.enabled
+ns3.enabled		A	10.53.0.3
+
diff --git a/bin/tests/system/dnssec/ns2/named.conf.in b/bin/tests/system/dnssec/ns2/named.conf.in
index 558eaecf49..189e275014 100644
--- a/bin/tests/system/dnssec/ns2/named.conf.in
+++ b/bin/tests/system/dnssec/ns2/named.conf.in
@@ -36,6 +36,16 @@ zone "dlv" {
 	file "dlv.db.signed";
 };
 
+zone "trusted" {
+	type master;
+	file "trusted.db.signed";
+};
+
+zone "managed" {
+	type master;
+	file "managed.db.signed";
+};
+
 zone "example" {
 	type master;
 	file "example.db.signed";
diff --git a/bin/tests/system/dnssec/ns2/sign.sh b/bin/tests/system/dnssec/ns2/sign.sh
index 8b9b20af0a..d0a978b61c 100644
--- a/bin/tests/system/dnssec/ns2/sign.sh
+++ b/bin/tests/system/dnssec/ns2/sign.sh
@@ -14,24 +14,59 @@
 
 set -e
 
+# Sign child zones (served by ns3).
+( cd ../ns3 && $SHELL sign.sh )
+
+echo_i "ns2/sign.sh"
+
+# Get the DS records for the "trusted." and "managed." zones.
+for subdomain in secure unsupported disabled enabled
+do
+	cp "../ns3/dsset-$subdomain.managed$TP" .
+	cp "../ns3/dsset-$subdomain.trusted$TP" .
+done
+
+# Sign the "trusted." and "managed." zones.
+zone=managed.
+infile=key.db.in
+zonefile=managed.db
+
+keyname1=$("$KEYGEN" -q -a "$ALTERNATIVE_ALGORITHM" -b "$ALTERNATIVE_BITS" -n zone -f KSK "$zone")
+keyname2=$("$KEYGEN" -q -a "$ALTERNATIVE_ALGORITHM" -b "$ALTERNATIVE_BITS" -n zone "$zone")
+
+cat "$infile" "$keyname1.key" "$keyname2.key" > "$zonefile"
+
+"$SIGNER" -P -g -o "$zone" -k "$keyname1" "$zonefile" "$keyname2" > /dev/null 2>&1
+
+zone=trusted.
+infile=key.db.in
+zonefile=trusted.db
+
+keyname1=$("$KEYGEN" -q -a "$ALTERNATIVE_ALGORITHM" -b "$ALTERNATIVE_BITS" -n zone -f KSK "$zone")
+keyname2=$("$KEYGEN" -q -a "$ALTERNATIVE_ALGORITHM" -b "$ALTERNATIVE_BITS" -n zone "$zone")
+
+cat "$infile" "$keyname1.key" "$keyname2.key" > "$zonefile"
+
+"$SIGNER" -P -g -o "$zone" -k "$keyname1" "$zonefile" "$keyname2" > /dev/null 2>&1
+
+# The "example." zone.
 zone=example.
 infile=example.db.in
 zonefile=example.db
 
-# Have the child generate a zone key and pass it to us.
-
-( cd ../ns3 && $SHELL sign.sh )
-
+# Get the DS records for the "example." zone.
 for subdomain in secure badds bogus dynamic keyless nsec3 optout \
 	nsec3-unknown optout-unknown multiple rsasha256 rsasha512 \
 	kskonly update-nsec3 auto-nsec auto-nsec3 secure.below-cname \
 	ttlpatch split-dnssec split-smart expired expiring upper lower \
-	dnskey-unknown dnskey-nsec3-unknown managed-future revkey \
+	dnskey-unknown dnskey-unsupported dnskey-unsupported-2 \
+	dnskey-nsec3-unknown managed-future revkey \
 	dname-at-apex-nsec3 occluded
 do
 	cp "../ns3/dsset-$subdomain.example$TP" .
 done
 
+# Sign the "example." zone.
 keyname1=$("$KEYGEN" -q -a "$ALTERNATIVE_ALGORITHM" -b "$ALTERNATIVE_BITS" -n zone -f KSK "$zone")
 keyname2=$("$KEYGEN" -q -a "$ALTERNATIVE_ALGORITHM" -b "$ALTERNATIVE_BITS" -n zone "$zone")
 
diff --git a/bin/tests/system/dnssec/ns3/key.db.in b/bin/tests/system/dnssec/ns3/key.db.in
new file mode 100644
index 0000000000..3847e2ea10
--- /dev/null
+++ b/bin/tests/system/dnssec/ns3/key.db.in
@@ -0,0 +1,24 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0. If a copy of the MPL was not distributed with this
+; file, You can obtain one at http://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 300	; 5 minutes
+@			IN SOA	mname1. . (
+				2000042407 ; serial
+				20         ; refresh (20 seconds)
+				20         ; retry (20 seconds)
+				1814400    ; expire (3 weeks)
+				3600       ; minimum (1 hour)
+				)
+			NS	ns3
+ns3			A	10.53.0.3
+
+a			A	10.0.0.1
+b			A	10.0.0.2
+c			A	10.0.0.3
+
diff --git a/bin/tests/system/dnssec/ns3/named.conf.in b/bin/tests/system/dnssec/ns3/named.conf.in
index 18268d7975..e33ee52146 100644
--- a/bin/tests/system/dnssec/ns3/named.conf.in
+++ b/bin/tests/system/dnssec/ns3/named.conf.in
@@ -313,6 +313,46 @@ zone "occluded.example" {
 	file "occluded.example.db.signed";
 };
 
+zone "secure.managed" {
+	type master;
+	file "secure.managed.db.signed";
+};
+
+zone "disabled.managed" {
+	type master;
+	file "disabled.managed.db.signed";
+};
+
+zone "enabled.managed" {
+	type master;
+	file "enabled.managed.db.signed";
+};
+
+zone "unsupported.managed" {
+	type master;
+	file "unsupported.managed.db.signed";
+};
+
+zone "secure.trusted" {
+	type master;
+	file "secure.trusted.db.signed";
+};
+
+zone "disabled.trusted" {
+	type master;
+	file "disabled.trusted.db.signed";
+};
+
+zone "enabled.trusted" {
+	type master;
+	file "enabled.trusted.db.signed";
+};
+
+zone "unsupported.trusted" {
+	type master;
+	file "unsupported.trusted.db.signed";
+};
+
 include "siginterval.conf";
 
 include "trusted.conf";
diff --git a/bin/tests/system/dnssec/ns3/sign.sh b/bin/tests/system/dnssec/ns3/sign.sh
index 055cd9444d..a9a063e0ef 100644
--- a/bin/tests/system/dnssec/ns3/sign.sh
+++ b/bin/tests/system/dnssec/ns3/sign.sh
@@ -14,6 +14,68 @@
 
 set -e
 
+echo_i "ns3/sign.sh"
+
+infile=key.db.in
+for tld in managed trusted
+do
+	# A secure zone to test.
+	zone=secure.${tld}
+	zonefile=${zone}.db
+
+	keyname1=$("$KEYGEN" -f KSK -q -a "$DEFAULT_ALGORITHM" -b "$DEFAULT_BITS" -n zone "$zone")
+	cat "$infile" "$keyname1.key" > "$zonefile"
+	"$SIGNER" -z -P -3 - -o "$zone" -O full -f ${zonefile}.signed "$zonefile" > /dev/null 2>&1
+
+	# Zone to test trust anchor that matches disabled algorithm.
+	zone=disabled.${tld}
+	zonefile=${zone}.db
+
+	keyname2=$("$KEYGEN" -f KSK -q -a "$DISABLED_ALGORITHM" -b "$DISABLED_BITS" -n zone "$zone")
+	cat "$infile" "$keyname2.key" > "$zonefile"
+	"$SIGNER" -z -P -3 - -o "$zone" -O full -f ${zonefile}.signed "$zonefile" > /dev/null 2>&1
+
+	# Zone to test trust anchor that has disabled algorithm for other domain.
+	zone=enabled.${tld}
+	zonefile=${zone}.db
+
+	keyname3=$("$KEYGEN" -f KSK -q -a "$DISABLED_ALGORITHM" -b "$DISABLED_BITS" -n zone "$zone")
+	cat "$infile" "$keyname3.key" > "$zonefile"
+	"$SIGNER" -z -P -3 - -o "$zone" -O full -f ${zonefile}.signed "$zonefile" > /dev/null 2>&1
+
+	# Zone to test trust anchor with unsupported algorithm.
+	zone=unsupported.${tld}
+	zonefile=${zone}.db
+
+	keyname4=$("$KEYGEN" -f KSK -q -a "$DEFAULT_ALGORITHM" -b "$DEFAULT_BITS" -n zone "$zone")
+	cat "$infile" "$keyname4.key" > "$zonefile"
+	"$SIGNER" -z -P -3 - -o "$zone" -O full -f ${zonefile}.tmp "$zonefile" > /dev/null 2>&1
+	awk '$4 == "DNSKEY" { $7 = 255 } $4 == "RRSIG" { $6 = 255 } { print }' ${zonefile}.tmp > ${zonefile}.signed
+
+	# Make trusted-keys and managed keys conf sections for ns8.
+	mv ${keyname4}.key ${keyname4}.tmp
+	awk '$1 == "unsupported.'"${tld}"'." { $6 = 255 } { print }' ${keyname4}.tmp > ${keyname4}.key
+
+	# Zone to test trust anchor that is revoked.
+	zone=revoked.${tld}
+	zonefile=${zone}.db
+
+	keyname5=$("$KEYGEN" -f KSK -f REVOKE -q -a "$DEFAULT_ALGORITHM" -b "$DEFAULT_BITS" -n zone "$zone")
+	cat "$infile" "$keyname5.key" > "$zonefile"
+	"$SIGNER" -z -P -3 - -o "$zone" -O full -f ${zonefile}.signed "$zonefile" > /dev/null 2>&1
+
+	case $tld in
+	"managed")
+		keyfile_to_managed_keys $keyname1 $keyname2 $keyname3 $keyname4 $keyname5 > ../ns8/managed.conf
+		;;
+	"trusted")
+		keyfile_to_trusted_keys $keyname1 $keyname2 $keyname3 $keyname4 $keyname5 > ../ns8/trusted.conf
+		;;
+	esac
+done
+
+echo_i "ns3/sign.sh: example zones"
+
 zone=secure.example.
 infile=secure.example.db.in
 zonefile=secure.example.db
@@ -209,7 +271,7 @@ cat "$infile" "$keyname.key" > "$zonefile"
 
 "$SIGNER" -P -3 - -o "$zone" -O full -f ${zonefile}.tmp "$zonefile" > /dev/null 2>&1
 
-awk '$4 == "DNSKEY" { $7 = 100; print } $4 == "RRSIG" { $6 = 100; print } { print }' ${zonefile}.tmp > ${zonefile}.signed
+awk '$4 == "DNSKEY" { $7 = 100 } $4 == "RRSIG" { $6 = 100 } { print }' ${zonefile}.tmp > ${zonefile}.signed
 
 DSFILE="dsset-$(echo ${zone} |sed -e "s/\\.$//g")$TP"
 $DSFROMKEY -A -f ${zonefile}.signed "$zone" > "$DSFILE"
@@ -228,7 +290,7 @@ cat "$infile" "$keyname.key" > "$zonefile"
 
 "$SIGNER" -P -3 - -o "$zone" -O full -f ${zonefile}.tmp "$zonefile" > /dev/null 2>&1
 
-awk '$4 == "DNSKEY" { $7 = 255; print } $4 == "RRSIG" { $6 = 255; print } { print }' ${zonefile}.tmp > ${zonefile}.signed
+awk '$4 == "DNSKEY" { $7 = 255 } $4 == "RRSIG" { $6 = 255 } { print }' ${zonefile}.tmp > ${zonefile}.signed
 
 DSFILE="dsset-$(echo ${zone} |sed -e "s/\\.$//g")$TP"
 $DSFROMKEY -A -f ${zonefile}.signed "$zone" > "$DSFILE"
@@ -246,7 +308,6 @@ zsk=$("$KEYGEN" -q -a "$DEFAULT_ALGORITHM" -b "$DEFAULT_BITS" -n zone "$zone")
 
 cat "$infile" "$ksk.key" "$zsk.key" unsupported-algorithm.key > "$zonefile"
 
-# "$SIGNER" -P -3 - -o "$zone" -f ${zonefile}.signed "$zonefile" > /dev/null 2>&1
 "$SIGNER" -P -3 - -o "$zone" -f ${zonefile}.signed "$zonefile" > /dev/null 2>&1
 
 #
diff --git a/bin/tests/system/dnssec/ns5/sign.sh b/bin/tests/system/dnssec/ns5/sign.sh
index 9f9c39fb73..83f08769c0 100644
--- a/bin/tests/system/dnssec/ns5/sign.sh
+++ b/bin/tests/system/dnssec/ns5/sign.sh
@@ -14,6 +14,8 @@
 
 set -e
 
+echo_i "ns5/sign.sh"
+
 zone=.
 infile=../ns1/root.db.in
 zonefile=root.db.signed
diff --git a/bin/tests/system/dnssec/ns6/sign.sh b/bin/tests/system/dnssec/ns6/sign.sh
index 54a21548bc..80d8881c15 100644
--- a/bin/tests/system/dnssec/ns6/sign.sh
+++ b/bin/tests/system/dnssec/ns6/sign.sh
@@ -14,6 +14,8 @@
 
 set -e
 
+echo_i "ns6/sign.sh"
+
 zone=optout-tld
 infile=optout-tld.db.in
 zonefile=optout-tld.db
diff --git a/bin/tests/system/dnssec/ns7/sign.sh b/bin/tests/system/dnssec/ns7/sign.sh
index a5d8dc0bd2..625300339c 100644
--- a/bin/tests/system/dnssec/ns7/sign.sh
+++ b/bin/tests/system/dnssec/ns7/sign.sh
@@ -14,6 +14,8 @@
 
 set -e
 
+echo_i "ns7/sign.sh"
+
 zone=split-rrsig
 infile=split-rrsig.db.in
 zonefile=split-rrsig.db
diff --git a/bin/tests/system/dnssec/ns8/named.conf.in b/bin/tests/system/dnssec/ns8/named.conf.in
new file mode 100644
index 0000000000..de95e26301
--- /dev/null
+++ b/bin/tests/system/dnssec/ns8/named.conf.in
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+// NS8
+
+options {
+	query-source address 10.53.0.8;
+	notify-source 10.53.0.8;
+	transfer-source 10.53.0.8;
+	port @PORT@;
+	pid-file "named.pid";
+	listen-on { 10.53.0.8; };
+	listen-on-v6 { none; };
+	recursion yes;
+	dnssec-enable yes;
+	dnssec-validation yes;
+	minimal-responses no;
+	disable-algorithms "disabled.managed." { @DISABLED_ALGORITHM@; };
+	disable-algorithms "disabled.trusted." { @DISABLED_ALGORITHM@; };
+};
+
+key rndc_key {
+	secret "1234abcd8765";
+	algorithm hmac-sha256;
+};
+
+controls {
+	inet 10.53.0.8 port @CONTROLPORT@ allow { any; } keys { rndc_key; };
+};
+
+zone "." {
+	type hint;
+	file "../../common/root.hint";
+};
+
+include "managed.conf";
+include "trusted.conf";
+
diff --git a/bin/tests/system/dnssec/setup.sh b/bin/tests/system/dnssec/setup.sh
index 62cf46cff0..2238153204 100644
--- a/bin/tests/system/dnssec/setup.sh
+++ b/bin/tests/system/dnssec/setup.sh
@@ -25,6 +25,7 @@ copy_setports ns5/named1.conf.in ns5/named.conf
 
 copy_setports ns6/named.conf.in ns6/named.conf
 copy_setports ns7/named.conf.in ns7/named.conf
+copy_setports ns8/named.conf.in ns8/named.conf
 
 (
     cd ns1
diff --git a/bin/tests/system/dnssec/tests.sh b/bin/tests/system/dnssec/tests.sh
index b07f540c5e..458ecacf7f 100644
--- a/bin/tests/system/dnssec/tests.sh
+++ b/bin/tests/system/dnssec/tests.sh
@@ -1402,8 +1402,11 @@ status=$((status+ret))
 echo_i "checking that a key using an unsupported algorithm cannot be generated ($n)"
 ret=0
 zone=example
-$KEYGEN -a 255 example > dnssectools.out.test$n 2>&1 && ret=0
-grep "unsupported algorithm: 255" dnssectools.out.test$n || ret=1
+# If dnssec-keygen fails, the test script will exit immediately.  Prevent that
+# from happening, and also trigger a test failure if dnssec-keygen unexpectedly
+# succeeds, by using "&& ret=1".
+$KEYGEN -a 255 $zone > dnssectools.out.test$n 2>&1 && ret=1
+grep -q "unsupported algorithm: 255" dnssectools.out.test$n || ret=1
 n=$((n+1))
 test "$ret" -eq 0 || echo_i "failed"
 status=$((status+ret))
@@ -1413,23 +1416,26 @@ ret=0
 zone=example
 # Fake an unsupported algorithm key
 unsupportedkey=$("$KEYGEN" -q -a "$DEFAULT_ALGORITHM" -b "$DEFAULT_BITS" -n zone "$zone")
-awk '$3 == "DNSKEY" { $6 = 255; print } { print }' ${unsupportedkey}.key > ${unsupportedkey}.tmp
+awk '$3 == "DNSKEY" { $6 = 255 } { print }' ${unsupportedkey}.key > ${unsupportedkey}.tmp
 mv ${unsupportedkey}.tmp ${unsupportedkey}.key
-$DSFROMKEY ${unsupportedkey} > dnssectools.out.test$n 2>&1 && ret=0
-grep "algorithm is unsupported" dnssectools.out.test$n || ret=1
+# If dnssec-dsfromkey fails, the test script will exit immediately.  Prevent
+# that from happening, and also trigger a test failure if dnssec-dsfromkey
+# unexpectedly succeeds, by using "&& ret=1".
+$DSFROMKEY ${unsupportedkey} > dnssectools.out.test$n 2>&1 && ret=1
+grep -q "algorithm is unsupported" dnssectools.out.test$n || ret=1
 n=$((n+1))
 test "$ret" -eq 0 || echo_i "failed"
 status=$((status+ret))
 
 echo_i "checking that a zone cannot be signed with a key using an unsupported algorithm ($n)"
 ret=0
-cp ${unsupportedkey}.* signer/
-(
-cd signer || exit 1
-cat example.db.in "${unsupportedkey}.key" > example.db
-$SIGNER -o example example.db ${unsupportedkey} > ../dnssectools.out.test$n 2>&1 && ret=0
-) && ret=0
-grep "algorithm is unsupported" dnssectools.out.test$n || ret=1
+ret=0
+cat signer/example.db.in "${unsupportedkey}.key" > signer/example.db
+# If dnssec-signzone fails, the test script will exit immediately.  Prevent that
+# from happening, and also trigger a test failure if dnssec-signzone
+# unexpectedly succeeds, by using "&& ret=1".
+$SIGNER -o example signer/example.db ${unsupportedkey} > dnssectools.out.test$n 2>&1 && ret=1
+grep -q "algorithm is unsupported" dnssectools.out.test$n || ret=1
 n=$((n+1))
 test "$ret" -eq 0 || echo_i "failed"
 status=$((status+ret))
@@ -3683,5 +3689,172 @@ n=$((n+1))
 test "$ret" -eq 0 || echo_i "failed"
 status=$((status+ret))
 
+#
+# DNSSEC tests related to unsupported, disabled and revoked trust anchors.
+#
+
+# This nameserver (ns8) is loaded with a bunch of trust anchors.  Some of them
+# are good (enabled.managed, enabled.trusted, secure.managed, secure.trusted),
+# and some of them are bad (disabled.managed, revoked.managed, unsupported.managed,
+# disabled.trusted, revoked.trusted, unsupported.trusted).  Make sure that the bad
+# trust anchors are ignored.  This is tested by looking for the corresponding
+# lines in the logfile.
+echo_i "checking that keys with unsupported algorithms and disabled algorithms are ignored ($n)"
+ret=0
+grep -q "ignoring trusted key for 'disabled\.trusted\.': algorithm is disabled" ns8/named.run || ret=1
+grep -q "ignoring trusted key for 'unsupported\.trusted\.': algorithm is unsupported" ns8/named.run || ret=1
+grep -q "ignoring managed key for 'disabled\.managed\.': algorithm is disabled" ns8/named.run || ret=1
+grep -q "ignoring managed key for 'unsupported\.managed\.': algorithm is unsupported" ns8/named.run || ret=1
+n=$((n+1))
+test "$ret" -eq 0 || echo_i "failed"
+status=$((status+ret))
+
+# The next two tests are fairly normal DNSSEC queries to signed zones with a
+# default algorithm.  First, a query is made against the server that is
+# authoritative for the given zone (ns3).  Second, a query is made against a
+# resolver with trust anchors for the given zone (ns8).  Both are expected to
+# return an authentic data positive response.
+echo_i "checking that a trusted key using a supported algorithm validates as secure ($n)"
+ret=0
+dig_with_opts @10.53.0.3 a.secure.trusted A > dig.out.ns3.test$n
+dig_with_opts @10.53.0.8 a.secure.trusted A > dig.out.ns8.test$n
+grep "status: NOERROR," dig.out.ns3.test$n > /dev/null || ret=1
+grep "status: NOERROR," dig.out.ns8.test$n > /dev/null || ret=1
+grep "flags:.*ad.*QUERY" dig.out.ns8.test$n > /dev/null || ret=1
+n=$((n+1))
+test "$ret" -eq 0 || echo_i "failed"
+status=$((status+ret))
+
+echo_i "checking that a managed key using a supported algorithm validates as secure ($n)"
+ret=0
+dig_with_opts @10.53.0.3 a.secure.managed A > dig.out.ns3.test$n
+dig_with_opts @10.53.0.8 a.secure.managed A > dig.out.ns8.test$n
+grep "status: NOERROR," dig.out.ns3.test$n > /dev/null || ret=1
+grep "status: NOERROR," dig.out.ns8.test$n > /dev/null || ret=1
+grep "flags:.*ad.*QUERY" dig.out.ns8.test$n > /dev/null || ret=1
+n=$((n+1))
+test "$ret" -eq 0 || echo_i "failed"
+status=$((status+ret))
+
+# The next two queries ensure that a zone signed with a DNSKEY with an unsupported
+# algorithm will yield insecure positive responses.  These trust anchors in ns8 are
+# ignored and so this domain is treated as insecure.  The AD bit should not be set
+# in the response.
+echo_i "checking that a trusted key using an unsupported algorithm validates as insecure ($n)"
+ret=0
+dig_with_opts @10.53.0.3 a.unsupported.trusted A > dig.out.ns3.test$n
+dig_with_opts @10.53.0.8 a.unsupported.trusted A > dig.out.ns8.test$n
+grep "status: NOERROR," dig.out.ns3.test$n > /dev/null || ret=1
+grep "status: NOERROR," dig.out.ns8.test$n > /dev/null || ret=1
+grep "flags:.*ad.*QUERY" dig.out.ns8.test$n > /dev/null && ret=1
+n=$((n+1))
+test "$ret" -eq 0 || echo_i "failed"
+status=$((status+ret))
+
+echo_i "checking that a managed key using an unsupported algorithm validates as insecure ($n)"
+ret=0
+dig_with_opts @10.53.0.3 a.unsupported.managed A > dig.out.ns3.test$n
+dig_with_opts @10.53.0.8 a.unsupported.managed A > dig.out.ns8.test$n
+grep "status: NOERROR," dig.out.ns3.test$n > /dev/null || ret=1
+grep "status: NOERROR," dig.out.ns8.test$n > /dev/null || ret=1
+grep "flags:.*ad.*QUERY" dig.out.ns8.test$n > /dev/null && ret=1
+n=$((n+1))
+test "$ret" -eq 0 || echo_i "failed"
+status=$((status+ret))
+
+# The next two queries ensure that a zone signed with a DNSKEY that the nameserver
+# has a disabled algorithm match for will yield insecure positive responses.
+# These trust anchors in ns8 are ignored and so this domain is treated as insecure.
+# The AD bit should not be set in the response.
+echo_i "checking that a trusted key using a disabled algorithm validates as insecure ($n)"
+ret=0
+dig_with_opts @10.53.0.3 a.disabled.trusted A > dig.out.ns3.test$n
+dig_with_opts @10.53.0.8 a.disabled.trusted A > dig.out.ns8.test$n
+grep "status: NOERROR," dig.out.ns3.test$n > /dev/null || ret=1
+grep "status: NOERROR," dig.out.ns8.test$n > /dev/null || ret=1
+grep "flags:.*ad.*QUERY" dig.out.ns8.test$n > /dev/null && ret=1
+n=$((n+1))
+test "$ret" -eq 0 || echo_i "failed"
+status=$((status+ret))
+
+echo_i "checking that a managed key using a disabled algorithm validates as insecure ($n)"
+ret=0
+dig_with_opts @10.53.0.3 a.disabled.managed A > dig.out.ns3.test$n
+dig_with_opts @10.53.0.8 a.disabled.managed A > dig.out.ns8.test$n
+grep "status: NOERROR," dig.out.ns3.test$n > /dev/null || ret=1
+grep "status: NOERROR," dig.out.ns8.test$n > /dev/null || ret=1
+grep "flags:.*ad.*QUERY" dig.out.ns8.test$n > /dev/null && ret=1
+n=$((n+1))
+test "$ret" -eq 0 || echo_i "failed"
+status=$((status+ret))
+
+# The next two queries ensure that a zone signed with a DNSKEY that the
+# nameserver has a disabled algorithm for, but for a different domain, will
+# yield secure positive responses.  Since "enabled.trusted." and
+# "enabled.managed." do not match the "disable-algorithms" option, no
+# special rules apply and these zones should validate as secure, with the AD
+# bit set.
+echo_i "checking that a trusted key using an algorithm disabled for another domain validates as secure ($n)"
+ret=0
+dig_with_opts @10.53.0.3 a.enabled.trusted A > dig.out.ns3.test$n
+dig_with_opts @10.53.0.8 a.enabled.trusted A > dig.out.ns8.test$n
+grep "status: NOERROR," dig.out.ns3.test$n > /dev/null || ret=1
+grep "status: NOERROR," dig.out.ns8.test$n > /dev/null || ret=1
+grep "flags:.*ad.*QUERY" dig.out.ns8.test$n > /dev/null || ret=1
+n=$((n+1))
+test "$ret" -eq 0 || echo_i "failed"
+status=$((status+ret))
+
+echo_i "checking that a managed key using an algorithm disabled for another domain validates as secure ($n)"
+ret=0
+dig_with_opts @10.53.0.3 a.enabled.managed A > dig.out.ns3.test$n
+dig_with_opts @10.53.0.8 a.enabled.managed A > dig.out.ns8.test$n
+grep "status: NOERROR," dig.out.ns3.test$n > /dev/null || ret=1
+grep "status: NOERROR," dig.out.ns8.test$n > /dev/null || ret=1
+grep "flags:.*ad.*QUERY" dig.out.ns8.test$n > /dev/null || ret=1
+n=$((n+1))
+test "$ret" -eq 0 || echo_i "failed"
+status=$((status+ret))
+
+# A configured revoked trust anchor is ignored and thus the two queries below
+# should result in insecure responses, since no trust points for the
+# "revoked.trusted." and "revoked.managed." zones are created.
+echo_i "checking that a trusted key that is revoked validates as insecure ($n)"
+ret=0
+dig_with_opts @10.53.0.3 a.revoked.trusted A > dig.out.ns3.test$n
+dig_with_opts @10.53.0.8 a.revoked.trusted A > dig.out.ns8.test$n
+grep "status: NOERROR," dig.out.ns3.test$n > /dev/null || ret=1
+grep "status: NOERROR," dig.out.ns8.test$n > /dev/null || ret=1
+grep "flags:.*ad.*QUERY" dig.out.ns8.test$n > /dev/null && ret=1
+n=$((n+1))
+test "$ret" -eq 0 || echo_i "failed"
+status=$((status+ret))
+
+echo_i "checking that a managed key that is revoked validates as insecure ($n)"
+ret=0
+dig_with_opts @10.53.0.3 a.revoked.managed A > dig.out.ns3.test$n
+dig_with_opts @10.53.0.8 a.revoked.managed A > dig.out.ns8.test$n
+grep "status: NOERROR," dig.out.ns3.test$n > /dev/null || ret=1
+grep "status: NOERROR," dig.out.ns8.test$n > /dev/null || ret=1
+grep "flags:.*ad.*QUERY" dig.out.ns8.test$n > /dev/null && ret=1
+n=$((n+1))
+test "$ret" -eq 0 || echo_i "failed"
+status=$((status+ret))
+
+# Note: after this check, ns4 will not be validating any more; do not add any
+# further validation tests employing ns4 below this check.
+echo_i "check that validation defaults to off when dnssec-enable is off ($n)"
+ret=0
+# Sanity check - validation should be enabled.
+rndccmd 10.53.0.4 validation status | grep "enabled" > /dev/null || ret=1
+# Set "dnssec-enable" to "no" and reconfigure.
+copy_setports ns4/named5.conf.in ns4/named.conf
+rndccmd 10.53.0.4 reconfig 2>&1 | sed 's/^/ns4 /' | cat_i
+# Check validation status again.
+rndccmd 10.53.0.4 validation status | grep "disabled" > /dev/null || ret=1
+n=$((n+1))
+test "$ret" -eq 0 || echo_i "failed"
+status=$((status+ret))
+
 echo_i "exit status: $status"
 [ $status -eq 0 ] || exit 1
diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index f69d5dcc75..a97a4d3acf 100644
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -5033,6 +5033,12 @@ options {
 		by the <command>disable-algorithms</command> will be treated
 		as insecure.
 	      </para>
+	      <para>
+		Configured trust anchors in <command>trusted-keys</command>
+		or <command>managed-keys</command> that match a disabled
+		algorithm will be ignored and treated as if they were not
+		configured at all.
+	      </para>
 	    </listitem>
 	  </varlistentry>