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authorViacheslav Hletenko <v.gletenko@vyos.io>2022-05-17 21:30:50 +0000
committerViacheslav Hletenko <v.gletenko@vyos.io>2022-05-28 13:20:13 +0000
commite990b2f4c045f5d1be02915ec7d8869d5475ed4e (patch)
tree47d28c45e5cabe54ec9507e9bc44e894ab4b8b2d /src/helpers/vyos-domain-group-resolve.py
parent9347dc53c5bd3d5712121524ea16f3030d735601 (diff)
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firewall: T970: Add firewall group domain-group
Domain group allows to filter addresses by domain main Resolved addresses as elements are stored to named "nft set" that used in the nftables rules Also added a dynamic "resolver" systemd daemon vyos-domain-group-resolve.service which starts python script for the domain-group addresses resolving by timeout 300 sec set firewall group domain-group DOMAINS address 'example.com' set firewall group domain-group DOMAINS address 'example.org' set firewall name FOO rule 10 action 'drop' set firewall name FOO rule 10 source group domain-group 'DOMAINS' set interfaces ethernet eth0 firewall local name 'FOO' nft list table ip filter table ip filter { set DOMAINS { type ipv4_addr flags interval elements = { 192.0.2.1, 192.0.2.85, 203.0.113.55, 203.0.113.58 } } chain NAME_FOO { ip saddr @DOMAINS counter packets 0 bytes 0 drop comment "FOO-10" counter packets 0 bytes 0 return comment "FOO default-action accept" } }
Diffstat (limited to 'src/helpers/vyos-domain-group-resolve.py')
-rwxr-xr-xsrc/helpers/vyos-domain-group-resolve.py54
1 files changed, 54 insertions, 0 deletions
diff --git a/src/helpers/vyos-domain-group-resolve.py b/src/helpers/vyos-domain-group-resolve.py
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+++ b/src/helpers/vyos-domain-group-resolve.py
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+#!/usr/bin/env python3
+#
+# Copyright (C) 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
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+import time
+
+from vyos.configquery import ConfigTreeQuery
+from vyos.firewall import get_ips_domains_dict
+from vyos.firewall import nft_add_set_elements
+from vyos.firewall import nft_flush_set
+from vyos.firewall import nft_init_set
+from vyos.firewall import nft_update_set_elements
+from vyos.util import call
+
+
+base = ['firewall', 'group', 'domain-group']
+check_required = True
+count_failed = 0
+# Timeout in sec between checks
+timeout = 300
+
+
+if __name__ == '__main__':
+
+ while check_required:
+ config = ConfigTreeQuery()
+ if config.exists(base):
+ domain_groups = config.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
+ for set_name, domain_config in domain_groups.items():
+ list_domains = domain_config['address']
+ elements = get_ips_domains_dict(list_domains)
+ # Resolve successful
+ if bool(elements):
+ nft_update_set_elements(set_name, elements)
+ count_failed = 0
+ else:
+ count_failed += 1
+ # Domains not resolved 3 times by timeout
+ if count_failed >= timeout * 3:
+ nft_flush_set(set_name)
+ time.sleep(timeout)