#!/usr/bin/env python3 # # Copyright (C) 2021-2022 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 . import unittest from glob import glob from base_vyostest_shim import VyOSUnitTestSHIM from vyos.util import cmd sysfs_config = { 'all_ping': {'sysfs': '/proc/sys/net/ipv4/icmp_echo_ignore_all', 'default': '0', 'test_value': 'disable'}, 'broadcast_ping': {'sysfs': '/proc/sys/net/ipv4/icmp_echo_ignore_broadcasts', 'default': '1', 'test_value': 'enable'}, 'ip_src_route': {'sysfs': '/proc/sys/net/ipv4/conf/*/accept_source_route', 'default': '0', 'test_value': 'enable'}, 'ipv6_receive_redirects': {'sysfs': '/proc/sys/net/ipv6/conf/*/accept_redirects', 'default': '0', 'test_value': 'enable'}, 'ipv6_src_route': {'sysfs': '/proc/sys/net/ipv6/conf/*/accept_source_route', 'default': '-1', 'test_value': 'enable'}, 'log_martians': {'sysfs': '/proc/sys/net/ipv4/conf/all/log_martians', 'default': '1', 'test_value': 'disable'}, 'receive_redirects': {'sysfs': '/proc/sys/net/ipv4/conf/*/accept_redirects', 'default': '0', 'test_value': 'enable'}, 'send_redirects': {'sysfs': '/proc/sys/net/ipv4/conf/*/send_redirects', 'default': '1', 'test_value': 'disable'}, 'syn_cookies': {'sysfs': '/proc/sys/net/ipv4/tcp_syncookies', 'default': '1', 'test_value': 'disable'}, 'twa_hazards_protection': {'sysfs': '/proc/sys/net/ipv4/tcp_rfc1337', 'default': '0', 'test_value': 'enable'} } class TestFirewall(VyOSUnitTestSHIM.TestCase): @classmethod def setUpClass(cls): super(TestFirewall, cls).setUpClass() # ensure we can also run this test on a live system - so lets clean # out the current configuration :) cls.cli_delete(cls, ['firewall']) cls.cli_set(cls, ['interfaces', 'ethernet', 'eth0', 'address', '172.16.10.1/24']) @classmethod def tearDownClass(cls): cls.cli_delete(cls, ['interfaces', 'ethernet', 'eth0', 'address', '172.16.10.1/24']) super(TestFirewall, cls).tearDownClass() def tearDown(self): self.cli_delete(['interfaces', 'ethernet', 'eth0', 'firewall']) self.cli_delete(['firewall']) self.cli_commit() def test_groups(self): self.cli_set(['firewall', 'group', 'mac-group', 'smoketest_mac', 'mac-address', '00:01:02:03:04:05']) self.cli_set(['firewall', 'group', 'network-group', 'smoketest_network', 'network', '172.16.99.0/24']) self.cli_set(['firewall', 'group', 'port-group', 'smoketest_port', 'port', '53']) self.cli_set(['firewall', 'group', 'port-group', 'smoketest_port', 'port', '123']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'action', 'accept']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'source', 'group', 'network-group', 'smoketest_network']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'destination', 'address', '172.16.10.10']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'destination', 'group', 'port-group', 'smoketest_port']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'protocol', 'tcp_udp']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'action', 'accept']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'source', 'group', 'mac-group', 'smoketest_mac']) self.cli_set(['interfaces', 'ethernet', 'eth0', 'firewall', 'in', 'name', 'smoketest']) self.cli_commit() nftables_search = [ ['iifname "eth0"', 'jump NAME_smoketest'], ['ip saddr { 172.16.99.0/24 }', 'ip daddr 172.16.10.10', 'th dport { 53, 123 }', 'return'], ['ether saddr { 00:01:02:03:04:05 }', 'return'] ] nftables_output = cmd('sudo nft list table ip filter') for search in nftables_search: matched = False for line in nftables_output.split("\n"): if all(item in line for item in search): matched = True break self.assertTrue(matched, msg=search) def test_basic_rules(self): self.cli_set(['firewall', 'name', 'smoketest', 'default-action', 'drop']) self.cli_set(['firewall', 'name', 'smoketest', 'enable-default-log']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'action', 'accept']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'source', 'address', '172.16.20.10']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'destination', 'address', '172.16.10.10']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'log', 'enable']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'log-level', 'debug']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'action', 'reject']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'protocol', 'tcp']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'destination', 'port', '8888']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'log', 'enable']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'log-level', 'err']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'tcp', 'flags', 'syn']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'tcp', 'flags', 'not', 'ack']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '3', 'action', 'accept']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '3', 'protocol', 'tcp']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '3', 'destination', 'port', '22']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '3', 'limit', 'rate', '5/minute']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '3', 'log', 'disable']) self.cli_set(['interfaces', 'ethernet', 'eth0', 'firewall', 'in', 'name', 'smoketest']) self.cli_commit() nftables_search = [ ['iifname "eth0"', 'jump NAME_smoketest'], ['saddr 172.16.20.10', 'daddr 172.16.10.10', 'log prefix "[smoketest-1-A]" level debug','return'], ['tcp flags & (syn | ack) == syn', 'tcp dport { 8888 }', 'log prefix "[smoketest-2-R]" level err', 'reject'], ['tcp dport { 22 }', 'limit rate 5/minute', 'return'], ['log prefix "[smoketest-default-D]"','smoketest default-action', 'drop'] ] nftables_output = cmd('sudo nft list table ip filter') for search in nftables_search: matched = False for line in nftables_output.split("\n"): if all(item in line for item in search): matched = True break self.assertTrue(matched, msg=search) def test_basic_rules_ipv6(self): self.cli_set(['firewall', 'ipv6-name', 'v6-smoketest', 'default-action', 'drop']) self.cli_set(['firewall', 'ipv6-name', 'v6-smoketest', 'enable-default-log']) self.cli_set(['firewall', 'ipv6-name', 'v6-smoketest', 'rule', '1', 'action', 'accept']) self.cli_set(['firewall', 'ipv6-name', 'v6-smoketest', 'rule', '1', 'source', 'address', '2002::1']) self.cli_set(['firewall', 'ipv6-name', 'v6-smoketest', 'rule', '1', 'destination', 'address', '2002::1:1']) self.cli_set(['firewall', 'ipv6-name', 'v6-smoketest', 'rule', '1', 'log', 'enable']) self.cli_set(['firewall', 'ipv6-name', 'v6-smoketest', 'rule', '1', 'log-level', 'crit']) self.cli_set(['firewall', 'ipv6-name', 'v6-smoketest', 'rule', '2', 'action', 'reject']) self.cli_set(['firewall', 'ipv6-name', 'v6-smoketest', 'rule', '2', 'protocol', 'tcp_udp']) self.cli_set(['firewall', 'ipv6-name', 'v6-smoketest', 'rule', '2', 'destination', 'port', '8888']) self.cli_set(['interfaces', 'ethernet', 'eth0', 'firewall', 'in', 'ipv6-name', 'v6-smoketest']) self.cli_commit() nftables_search = [ ['iifname "eth0"', 'jump NAME6_v6-smoketest'], ['saddr 2002::1', 'daddr 2002::1:1', 'log prefix "[v6-smoketest-1-A]" level crit', 'return'], ['meta l4proto { tcp, udp }', 'th dport { 8888 }', 'reject'], ['smoketest default-action', 'log prefix "[v6-smoketest-default-D]"', 'drop'] ] nftables_output = cmd('sudo nft list table ip6 filter') for search in nftables_search: matched = False for line in nftables_output.split("\n"): if all(item in line for item in search): matched = True break self.assertTrue(matched, msg=search) def test_state_policy(self): self.cli_set(['firewall', 'state-policy', 'established', 'action', 'accept']) self.cli_set(['firewall', 'state-policy', 'related', 'action', 'accept']) self.cli_set(['firewall', 'state-policy', 'invalid', 'action', 'drop']) self.cli_commit() chains = { 'ip filter': ['VYOS_FW_FORWARD', 'VYOS_FW_OUTPUT', 'VYOS_FW_LOCAL'], 'ip6 filter': ['VYOS_FW6_FORWARD', 'VYOS_FW6_OUTPUT', 'VYOS_FW6_LOCAL'] } for table in ['ip filter', 'ip6 filter']: for chain in chains[table]: nftables_output = cmd(f'sudo nft list chain {table} {chain}') self.assertTrue('jump VYOS_STATE_POLICY' in nftables_output) def test_state_and_status_rules(self): self.cli_set(['firewall', 'name', 'smoketest', 'default-action', 'drop']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'action', 'accept']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'state', 'established', 'enable']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '1', 'state', 'related', 'enable']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'action', 'reject']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '2', 'state', 'invalid', 'enable']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '3', 'action', 'accept']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '3', 'state', 'new', 'enable']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '3', 'connection-status', 'nat', 'destination']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '4', 'action', 'accept']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '4', 'state', 'new', 'enable']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '4', 'state', 'established', 'enable']) self.cli_set(['firewall', 'name', 'smoketest', 'rule', '4', 'connection-status', 'nat', 'source']) self.cli_set(['interfaces', 'ethernet', 'eth0', 'firewall', 'in', 'name', 'smoketest']) self.cli_commit() nftables_search = [ ['iifname "eth0"', 'jump NAME_smoketest'], ['ct state { established, related }', 'return'], ['ct state { invalid }', 'reject'], ['ct state { new }', 'ct status { dnat }', 'return'], ['ct state { established, new }', 'ct status { snat }', 'return'], ['smoketest default-action', 'drop'] ] nftables_output = cmd('sudo nft list table ip filter') for search in nftables_search: matched = False for line in nftables_output.split("\n"): if all(item in line for item in search): matched = True break self.assertTrue(matched, msg=search) def test_sysfs(self): for name, conf in sysfs_config.items(): paths = glob(conf['sysfs']) for path in paths: with open(path, 'r') as f: self.assertEqual(f.read().strip(), conf['default'], msg=path) self.cli_set(['firewall', name.replace("_", "-"), conf['test_value']]) self.cli_commit() for name, conf in sysfs_config.items(): paths = glob(conf['sysfs']) for path in paths: with open(path, 'r') as f: self.assertNotEqual(f.read().strip(), conf['default'], msg=path) if __name__ == '__main__': unittest.main(verbosity=2)