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257 lines
8.7 KiB
Python
257 lines
8.7 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2014, Jarno Keskikangas <jarno.keskikangas@gmail.com>
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# (c) 2013, Aleksey Ovcharenko <aleksey.ovcharenko@gmail.com>
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# (c) 2013, James Martin <jmartin@basho.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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DOCUMENTATION = '''
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---
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module: ufw
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short_description: Manage firewall with UFW
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description:
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- Manage firewall with UFW.
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version_added: 1.6
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author: Aleksey Ovcharenko, Jarno Keskikangas
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notes:
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- See C(man ufw) for more examples.
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requirements:
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- C(ufw) package
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options:
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state:
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description:
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- C(enabled) reloads firewall and enables firewall on boot.
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- C(disabled) unloads firewall and disables firewall on boot.
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- C(reloaded) reloads firewall.
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- C(reseted) disables and resets firewall to installation defaults.
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required: false
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choices: ['enabled', 'disabled', 'reloaded', 'reseted']
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policy:
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description:
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- Change the default policy for incoming or outgoing traffic.
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required: false
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alias: default
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choices: ['allow', 'deny', 'reject']
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direction:
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description:
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- Select direction for a rule or default policy command.
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required: false
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choices: ['in', 'out', 'incoming', 'outgoing']
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logging:
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description:
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- Toggles logging. Logged packets use the LOG_KERN syslog facility.
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choices: ['on', 'off', 'low', 'medium', 'high', 'full']
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required: false
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insert:
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description:
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- Insert the corresponding rule as rule number NUM
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required: false
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rule:
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description:
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- Add firewall rule
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required: false
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choises: ['allow', 'deny', 'reject', 'limit']
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log:
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description:
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- Log new connections matched to this rule
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required: false
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choises: ['yes', 'no']
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from_ip:
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description:
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- Source IP address.
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required: false
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aliases: ['from', 'src']
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default: 'any'
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from_port:
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description:
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- Source port.
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required: false
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to_ip:
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description:
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- Destination IP address.
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required: false
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aliases: ['to', 'dest']
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default: 'any'
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to_port:
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description:
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- Destination port.
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required: false
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aliases: ['port']
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proto:
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description:
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- TCP/IP protocol.
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choices: ['any', 'tcp', 'udp', 'ipv6', 'esp', 'ah']
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required: false
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name:
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description:
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- Use profile located in C(/etc/ufw/applications.d)
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required: false
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aliases: ['app']
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delete:
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description:
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- Delete rule.
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required: false
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choices: ['yes', 'no']
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'''
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EXAMPLES = '''
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# Allow everything and enable UFW
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ufw: state=enable policy=allow logging=on
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# Sometimes it is desirable to let the sender know when traffic is
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# being denied, rather than simply ignoring it. In these cases, use
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# reject instead of deny. In addition, log rejected connections:
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ufw: rule=reject port=auth log=yes
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# ufw supports connection rate limiting, which is useful for protecting
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# against brute-force login attacks. ufw will deny connections if an IP
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# address has attempted to initiate 6 or more connections in the last
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# 30 seconds. See http://www.debian-administration.org/articles/187
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# for details. Typical usage is:
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ufw: rule=limit port=ssh proto=tcp
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# Allow OpenSSH
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ufw: rule=allow name=OpenSSH
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# Delete OpenSSH rule
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ufw: rule=allow name=OpenSSH delete=yes
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# Deny all access to port 53:
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ufw: rule=deny port=53
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# Allow all access to tcp port 80:
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ufw: rule=allow port=80 proto=tcp
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# Allow all access from RFC1918 networks to this host:
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ufw: rule=allow src={{ item }}
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with_items:
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- 10.0.0.0/8
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- 172.16.0.0/12
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- 192.168.0.0/16
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# Deny access to udp port 514 from host 1.2.3.4:
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ufw: rule=deny proto=udp src=1.2.3.4 port=514
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# Allow incoming access to eth0 from 1.2.3.5 port 5469 to 1.2.3.4 port 5469
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ufw: rule=allow interface=eth0 direction=in proto=udp src=1.2.3.5 from_port=5469 dest=1.2.3.4 to_port=5469
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# Deny all traffic from the IPv6 2001:db8::/32 to tcp port 25 on this host.
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# Note that IPv6 must be enabled in /etc/default/ufw for IPv6 firewalling to work.
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ufw: rule=deny proto=tcp src=2001:db8::/32 port=25
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'''
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from operator import itemgetter
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def main():
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module = AnsibleModule(
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argument_spec = dict(
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state = dict(default=None, choices=['enabled', 'disabled', 'reloaded', 'reset']),
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default = dict(default=None, aliases=['policy'], choices=['allow', 'deny', 'reject']),
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logging = dict(default=None, choises=['on', 'off', 'low', 'medium', 'high', 'full']),
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direction = dict(default=None, choises=['in', 'incoming', 'out', 'outgoing']),
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delete = dict(default=False, choices=BOOLEANS),
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insert = dict(default=None),
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rule = dict(default=None, choices=['allow', 'deny', 'reject', 'limit']),
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interface = dict(default=None, aliases=['if']),
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log = dict(default=False, type='bool'),
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from_ip = dict(default='any', aliases=['src', 'from']),
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from_port = dict(default=None),
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to_ip = dict(default='any', aliases=['dest', 'to']),
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to_port = dict(default=None, aliases=['port']),
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proto = dict(default=None, aliases=['protocol'], choices=['any', 'tcp', 'udp', 'ipv6', 'esp', 'ah']),
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app = dict(default=None, aliases=['name'])
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),
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supports_check_mode = True,
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mutually_exclusive = [['app', 'proto']]
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)
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cmds = []
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def execute(cmd):
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cmd = ' '.join(map(itemgetter(-1), filter(itemgetter(0), cmd)))
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cmds.append(cmd)
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(rc, out, err) = module.run_command(cmd)
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if rc != 0:
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module.fail_json(msg=err or out)
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params = module.params
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# Ensure at least one of the command arguments are given
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command_keys = ['state', 'default', 'rule', 'logging']
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commands = dict((key, params[key]) for key in command_keys if params[key])
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if len(commands) < 1:
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module.fail_json(msg="Not any of the command arguments %s given" % commands)
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# Ensure ufw is available
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ufw_bin = module.get_bin_path('ufw', True)
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# Save the pre state and rules in order to recognize changes
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(_, pre_state, _) = module.run_command(ufw_bin + ' status verbose')
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(_, pre_rules, _) = module.run_command("grep '^### tuple' /lib/ufw/user*.rules")
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# Execute commands
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for (command, value) in commands.iteritems():
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cmd = [[ufw_bin], [module.check_mode, '--dry-run']]
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if command == 'state':
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states = { 'enabled': 'enable', 'disabled': 'disable',
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'reloaded': 'reload', 'reset': 'reset' }
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execute(cmd + [['-f'], [states[value]]])
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elif command == 'logging':
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execute(cmd + [[command, value]])
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elif command == 'default':
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execute(cmd + [[command], [value], [params['direction']]])
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elif command == 'rule':
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# Rules are constructed according to the long format
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#
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# ufw [--dry-run] [delete] [insert NUM] allow|deny|reject|limit [in|out on INTERFACE] [log|log-all] \
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# [from ADDRESS [port PORT]] [to ADDRESS [port PORT]] \
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# [proto protocol] [app application]
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cmd.append([module.boolean(params['delete']), 'delete'])
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cmd.append([params['insert'], "insert %s" % params['insert']])
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cmd.append([value])
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cmd.append([module.boolean(params['log']), 'log'])
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for (key, template) in [('direction', "%s" ), ('interface', "on %s" ),
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('from_ip', "from %s" ), ('from_port', "port %s" ),
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('to_ip', "to %s" ), ('to_port', "port %s" ),
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('proto', "proto %s"), ('app', "app '%s'")]:
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value = params[key]
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cmd.append([value, template % (value)])
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execute(cmd)
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# Get the new state
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(_, post_state, _) = module.run_command(ufw_bin + ' status verbose')
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(_, post_rules, _) = module.run_command("grep '^### tuple' /lib/ufw/user*.rules")
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changed = (pre_state != post_state) or (pre_rules != post_rules)
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return module.exit_json(changed=changed, commands=cmds, msg=post_state.rstrip())
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# import module snippets
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from ansible.module_utils.basic import *
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main()
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