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-rwxr-xr-xsrc/conf_mode/dns_forwarding.py25
1 files changed, 13 insertions, 12 deletions
diff --git a/src/conf_mode/dns_forwarding.py b/src/conf_mode/dns_forwarding.py
index 23a16df63..fa9b21f20 100755
--- a/src/conf_mode/dns_forwarding.py
+++ b/src/conf_mode/dns_forwarding.py
@@ -1,6 +1,6 @@
#!/usr/bin/env python3
#
-# Copyright (C) 2018-2020 VyOS maintainers and contributors
+# Copyright (C) 2018-2022 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
@@ -16,6 +16,7 @@
import os
+from netifaces import interfaces
from sys import exit
from glob import glob
@@ -65,10 +66,6 @@ def get_config(config=None):
if conf.exists(base_nameservers):
dns.update({'system_name_server': conf.return_values(base_nameservers)})
- base_nameservers_dhcp = ['system', 'name-servers-dhcp']
- if conf.exists(base_nameservers_dhcp):
- dns.update({'system_name_server_dhcp': conf.return_values(base_nameservers_dhcp)})
-
if 'authoritative_domain' in dns:
dns['authoritative_zones'] = []
dns['authoritative_zone_errors'] = []
@@ -272,9 +269,8 @@ def verify(dns):
raise ConfigError('Invalid authoritative records have been defined')
if 'system' in dns:
- if not ('system_name_server' in dns or 'system_name_server_dhcp' in dns):
- print("Warning: No 'system name-server' or 'system " \
- "name-servers-dhcp' configured")
+ if not 'system_name_server' in dns:
+ print('Warning: No "system name-server" configured')
return None
@@ -339,10 +335,15 @@ def apply(dns):
hc.delete_name_server_tags_recursor(['system'])
# add dhcp nameserver tags for configured interfaces
- if 'system_name_server_dhcp' in dns:
- for interface in dns['system_name_server_dhcp']:
- hc.add_name_server_tags_recursor(['dhcp-' + interface,
- 'dhcpv6-' + interface ])
+ if 'system_name_server' in dns:
+ for interface in dns['system_name_server']:
+ # system_name_server key contains both IP addresses and interface
+ # names (DHCP) to use DNS servers. We need to check if the
+ # value is an interface name - only if this is the case, add the
+ # interface based DNS forwarder.
+ if interface in interfaces():
+ hc.add_name_server_tags_recursor(['dhcp-' + interface,
+ 'dhcpv6-' + interface ])
# hostsd will generate the forward-zones file
# the list and keys() are required as get returns a dict, not list