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-rw-r--r--data/templates/dns-forwarding/recursor.conf.j25
-rw-r--r--interface-definitions/dns-forwarding.xml.in12
-rwxr-xr-xsmoketest/scripts/cli/test_service_dns_forwarding.py11
-rwxr-xr-xsrc/conf_mode/dns_forwarding.py6
4 files changed, 34 insertions, 0 deletions
diff --git a/data/templates/dns-forwarding/recursor.conf.j2 b/data/templates/dns-forwarding/recursor.conf.j2
index c1950e1bc..ce1b676d1 100644
--- a/data/templates/dns-forwarding/recursor.conf.j2
+++ b/data/templates/dns-forwarding/recursor.conf.j2
@@ -32,6 +32,11 @@ local-address={{ listen_address | join(',') }}
# dnssec
dnssec={{ dnssec }}
+{% if dns64_prefix is vyos_defined %}
+# dns64-prefix
+dns64-prefix={{ dns64_prefix }}
+{% endif %}
+
# serve rfc1918 records
serve-rfc1918={{ 'no' if no_serve_rfc1918 is vyos_defined else 'yes' }}
diff --git a/interface-definitions/dns-forwarding.xml.in b/interface-definitions/dns-forwarding.xml.in
index baff4a841..3de0dc0eb 100644
--- a/interface-definitions/dns-forwarding.xml.in
+++ b/interface-definitions/dns-forwarding.xml.in
@@ -36,6 +36,18 @@
<multi/>
</properties>
</leafNode>
+ <leafNode name="dns64-prefix">
+ <properties>
+ <help>Help to communicate between IPv6-only client and IPv4-only server</help>
+ <valueHelp>
+ <format>ipv6net</format>
+ <description>IPv6 address and /96 only prefix length</description>
+ </valueHelp>
+ <constraint>
+ <validator name="ipv6-prefix"/>
+ </constraint>
+ </properties>
+ </leafNode>
<leafNode name="dnssec">
<properties>
<help>DNSSEC mode</help>
diff --git a/smoketest/scripts/cli/test_service_dns_forwarding.py b/smoketest/scripts/cli/test_service_dns_forwarding.py
index 5929f8cba..dcc0dc1e2 100755
--- a/smoketest/scripts/cli/test_service_dns_forwarding.py
+++ b/smoketest/scripts/cli/test_service_dns_forwarding.py
@@ -51,6 +51,7 @@ class TestServicePowerDNS(VyOSUnitTestSHIM.TestCase):
# Check basic DNS forwarding settings
cache_size = '20'
negative_ttl = '120'
+ dns_prefix = '64:ff9b::/96'
self.cli_set(base_path + ['cache-size', cache_size])
self.cli_set(base_path + ['negative-ttl', negative_ttl])
@@ -67,6 +68,12 @@ class TestServicePowerDNS(VyOSUnitTestSHIM.TestCase):
for address in listen_adress:
self.cli_set(base_path + ['listen-address', address])
+ # Check dns64-prefix - must be prefix /96
+ self.cli_set(base_path + ['dns64-prefix', '2001:db8:aabb::/64'])
+ with self.assertRaises(ConfigSessionError):
+ self.cli_commit()
+ self.cli_set(base_path + ['dns64-prefix', dns_prefix])
+
# configure DNSSEC
self.cli_set(base_path + ['dnssec', 'validate'])
@@ -100,6 +107,10 @@ class TestServicePowerDNS(VyOSUnitTestSHIM.TestCase):
tmp = get_config_value('serve-rfc1918')
self.assertEqual(tmp, 'yes')
+ # dns64-prefix
+ tmp = get_config_value('dns64-prefix')
+ self.assertEqual(tmp, dns_prefix)
+
# Check for running process
self.assertTrue(process_named_running(PROCESS_NAME))
diff --git a/src/conf_mode/dns_forwarding.py b/src/conf_mode/dns_forwarding.py
index 41023c135..a96183b04 100755
--- a/src/conf_mode/dns_forwarding.py
+++ b/src/conf_mode/dns_forwarding.py
@@ -266,6 +266,12 @@ def verify(dns):
if 'server' not in dns['domain'][domain]:
raise ConfigError(f'No server configured for domain {domain}!')
+ if 'dns64_prefix' in dns:
+ dns_prefix = dns['dns64_prefix'].split('/')[1]
+ # RFC 6147 requires prefix /96
+ if int(dns_prefix) != 96:
+ raise ConfigError('DNS forwarding "dns64-prefix" must be /96')
+
if ('authoritative_zone_errors' in dns) and dns['authoritative_zone_errors']:
for error in dns['authoritative_zone_errors']:
print(error)