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MAC-IP table

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This commit is contained in:
Hugo Levy-Falk 2019-03-12 22:06:21 +01:00 committed by root
parent 31ee6ef787
commit ec80954927
12 changed files with 453 additions and 119 deletions
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1
.gitignore vendored
View file

@ -1,3 +1,4 @@
config.ini
Pipfile*
# Created by https://www.gitignore.io/api/vim,python
# Edit at https://www.gitignore.io/?templates=vim,python

3
.gitmodules vendored Normal file
View file

@ -0,0 +1,3 @@
[submodule "re2oapi"]
path = re2oapi
url = https://gitlab.federez.net/re2o/re2oapi.git

6
checkmac.nft
View file

@ -1,9 +1,13 @@
# Table checkmac, à bas le spoof d'ips.
table firewall {
table inet firewall {
set ip_mac {
type ipv4_addr . ether_addr
}
chain checkmac {
meta iifname $if_adherent ip saddr . ether saddr != @ip_mac drop
meta iifname $if_aloes ip saddr . ether saddr != @ip_mac drop
}
}
# Note :

9
config.ini.example Normal file
View file

@ -0,0 +1,9 @@
[NAT]
range_in_adherent=10.69.0.0/31
range_out_adherent=193.48.225.11-193.48.225.12
first_port_adherent=11135
last_port_adherent=65535
[Re2o]
hostname=re2o.rezometz.org
password=some_pass
username=service-daemon

7
firewall.nft
View file

@ -1,4 +1,4 @@
#! /usr/sbin/nft -f
#! /usr/sbin/nft -I /usr/local/firewall -f
# Remise à zéro des règles du pare-feu
flush ruleset
@ -27,7 +27,10 @@ table inet firewall {
policy drop;
# Applique la politique globale
#jump global
jump global
# Passage par le checkmac pour les concernés
jump checkmac
# Filtre sur les interfaces entrantes, ne pas accepter
# directement dans la chaine, mais retourner.

289
firewall.py
View file

@ -33,13 +33,14 @@ Module for nftables set management.
import logging
import subprocess
import re
import netaddr # MAC, IPv4, IPv6
import requests
from collections import Iterable
from config import Config
from configparser import ConfigParser
class ExecError(Exception):
@ -95,13 +96,14 @@ class Parser:
ip: can either be a tuple (in this case returns an IPRange), a
single IP address or a IP Network.
"""
if isinstance(ip, tuple):
begin, end = ip
return netaddr.IPRange(begin, end, version=4)
try:
return netaddr.IPAddress(ip, version=4)
except ValueError:
except netaddr.core.AddrFormatError:
try:
return netaddr.IPNetwork(ip, version=4)
except netaddr.core.AddrFormatError:
begin, end = ip.split('-')
return netaddr.IPRange(begin, end)
@staticmethod
def IPv6(ip):
"""Check a IPv6 validity.
@ -127,9 +129,15 @@ class Parser:
@staticmethod
def port_number(port):
"""Check a port validity."""
try:
port_number = int(port)
if 0 <= port_number < 65536:
return port_number
except ValueError:
begin, end = port.split('-')
begin, end = int(begin), int(end)
if 0 <= begin < end <= 65536:
return port
raise ValueError('Invalid port number: "{}".'.format(port))
class NetfilterSet:
@ -145,6 +153,8 @@ class NetfilterSet:
FLAGS = {'constant', 'interval', 'timeout'}
NFT_TYPE = {'set', 'map'}
def __init__(self,
name,
type_, # e.g.: ('MAC', 'IPv4')
@ -152,21 +162,30 @@ class NetfilterSet:
use_sudo=True,
address_family='inet', # Manage both IPv4 and IPv6.
table_name='filter',
flags = []
flags = [],
type_from=None
):
self.name = name
self.content = set()
# self.type
self.set_type(type_)
if type_from:
self.set_type_from(type_from)
self.nft_type = 'map'
self.key_filters = tuple(self.FILTERS[i] for i in self.type_from)
else:
self.nft_type = 'set'
self.filters = tuple(self.FILTERS[i] for i in self.type)
self.set_flags(flags)
# self.address_family
self.set_address_family(address_family)
self.table = table_name
self.set_flags(flags)
sudo = ["/usr/bin/sudo"] * int(bool(use_sudo))
self.nft = [*sudo, "/usr/sbin/nft"]
if target_content:
if target_content and self.nft_type == 'set':
self._target_content = self.validate_set_data(target_content)
elif target_content and self.nft_type == 'map':
self._target_content = self.validate_map_data(target_content)
else:
self._target_content = set()
@ -181,6 +200,9 @@ class NetfilterSet:
def filter(self, elements):
return (self.filters[i](element) for i, element in enumerate(elements))
def filter_key(self, elements):
return (self.key_filters[i](element) for i, element in enumerate(elements))
def set_type(self, type_):
"""Check set type validity and store it along with a type checker."""
for element_type in type_:
@ -188,6 +210,13 @@ class NetfilterSet:
raise ValueError('Invalid type: "{}".'.format(element_type))
self.type = type_
def set_type_from(self, type_):
"""Check set type validity and store it along with a type checker."""
for element_type in type_:
if element_type not in self.TYPES:
raise ValueError('Invalid type: "{}".'.format(element_type))
self.type_from = type_
def set_address_family(self, address_family='ip'):
"""Set set addres_family, defaulting to "ip" like nftables."""
if address_family not in self.ADDRESS_FAMILIES:
@ -200,7 +229,7 @@ class NetfilterSet:
for f in flags_:
if f not in self.FLAGS:
raise ValueError('Invalid flag: "{}".'.format(f))
self.flags = _flags
self.flags = set(flags_)
def create_in_kernel(self):
"""Create the set, removing existing set if needed."""
@ -217,20 +246,34 @@ class NetfilterSet:
"""Delete the set, table and set must exist."""
CommandExec.run([
*self.nft,
'delete set {addr_family} {table} {set_}'.format(
'delete {nft_type} {addr_family} {table} {set_}'.format(
nft_type=self.nft_type,
addr_family=self.address_family, table=self.table,
set_=self.name)
])
def _create_new_set_in_kernel(self):
"""Create the non-existing set, creating table if needed."""
if self.flags:
nft_command = 'add {nft_type} {addr_family} {table} {set_} {{ type {type_} ; flags {flags};}}'.format(
nft_type=self.nft_type,
addr_family=self.address_family,
table=self.table,
set_=self.name,
type_=self.format_type(),
flags=', '.join(self.flags)
)
else:
nft_command = 'add {nft_type} {addr_family} {table} {set_} {{ type {type_} ;}}'.format(
nft_type=self.nft_type,
addr_family=self.address_family,
table=self.table,
set_=self.name,
type_=self.format_type(),
)
create_set = [
*self.nft,
'add set {addr_family} {table} {set_} {{ type {type_} ; flags {flags}}}'.format(
addr_family=self.address_family, table=self.table,
set_=self.name,
type_=' . '.join(self.TYPES[i] for i in self.type)),
flags=', '.join(self.flags)
nft_command
]
return_code = CommandExec.run(create_set, allowed_return_codes=(0, 1))
if return_code == 0:
@ -261,7 +304,33 @@ class NetfilterSet:
.format(len(errors), '",\n"'.join(map(str, errors))))
return set_
def validate_map_data(self, dict_data):
"""
Validate data, returning it or raising a ValueError.
For MAC-IPv4 set, data must be an iterable of (MAC, IPv4) iterables.
"""
set_ = {}
errors = []
for key in dict_data:
try:
set_[tuple(self.filter_key(key))] = tuple(self.filter(dict_data[key]))
except Exception as err:
errors.append(err)
if errors:
raise ValueError(
'Error parsing data, encountered the folowing {} errors.\n"{}"'
.format(len(errors), '",\n"'.join(map(str, errors))))
return set_
def _apply_target_content(self):
"""Change netfilter content to target set."""
if self.nft_type == 'set':
self._apply_target_content_set()
else:
self._apply_target_content_map()
def _apply_target_content_set(self):
"""Change netfilter set content to target set."""
current_set = self.get_netfilter_set_content()
if current_set is None:
@ -272,6 +341,23 @@ class NetfilterSet:
to_add = self._target_content - current_set
self._change_set_content(delete=to_delete, add=to_add)
def _apply_target_content_map(self):
"""Change netfilter set content to target set."""
current_map = self.get_netfilter_map_content()
if current_map is None:
raise ValueError('Cannot change "{}" netfilter map content: map '
'do not exist in "{}" "{}".'.format(
self.name, self.address_family, self.table))
keys_to_delete = current_map.keys() - self._target_content.keys()
keys_to_add = self._target_content.keys() - current_map.keys()
keys_to_check = current_map.keys() & self._target_content.keys()
for k in keys_to_check:
if current_map[k] != self._target_content[k]:
keys_to_add.add(k)
keys_to_delete.add(k)
to_add = {k : self._target_content[k] for k in keys_to_add}
self._change_map_content(delete=keys_to_delete, add=to_add)
def _change_set_content(self, delete=None, add=None):
todo = [tuple_ for tuple_ in (('add', add), ('delete', delete))
if tuple_[1]]
@ -286,6 +372,32 @@ class NetfilterSet:
]
CommandExec.run(command)
def _change_map_content(self, delete=None, add=None):
if delete:
content = ', '.join(' . '.join(str(element) for element in tuple_)
for tuple_ in delete)
command = [
*self.nft,
'delete element {addr_family} {table} {set_} {{{content}}}' \
.format(addr_family=self.address_family,
table=self.table, set_=self.name, content=content)
]
CommandExec.run(command)
if add:
content = ', '.join(
' . '.join(str(element) for element in tuple_)
+ ' : '
+ ' . '.join(str(element) for element in add[tuple_])
for tuple_ in add
)
command = [
*self.nft,
'add element {addr_family} {table} {set_} {{{content}}}' \
.format(addr_family=self.address_family,
table=self.table, set_=self.name, content=content)
]
CommandExec.run(command)
def _get_raw_netfilter_set(self, parse_elements=True):
"""Return a dict describing the netfilter set matching self or None."""
_, stdout, _ = CommandExec.run_check_output(
@ -301,9 +413,25 @@ class NetfilterSet:
if netfilter_set['name'] != self.name \
or netfilter_set['address_family'] != self.address_family \
or netfilter_set['table'] != self.table \
or netfilter_set['type'] != [
self.TYPES[type_] for type_ in self.type]:
raise ValueError('Did not get the right set, too wrong to fix.')
or not self.has_type(netfilter_set['type']) \
or netfilter_set.get('flags', set()) != self.flags:
raise ValueError(
'Did not get the right set, too wrong to fix. Got '
+ str(netfilter_set)
+ ("\nExpected : "
"\n\tname: {name}"
"\n\taddress_family: {family}"
"\n\ttable: {table}"
"\n\tflags: {flags}"
"\n\ttypes: {types}"
).format(
name=self.name,
family=self.address_family,
table=self.table,
flags=self.flags,
types=tuple(self.TYPES[t] for t in self.type)
)
)
if parse_elements:
if netfilter_set['raw_content']:
netfilter_set['content'] = self.validate_set_data((
@ -313,21 +441,79 @@ class NetfilterSet:
netfilter_set['content'] = set()
return netfilter_set
def _get_raw_netfilter_map(self, parse_elements=True):
"""Return a dict describing the netfilter map matching self or None."""
_, stdout, _ = CommandExec.run_check_output(
[*self.nft, '-nn', 'list map {addr_family} {table} {set_}'.format(
addr_family=self.address_family, table=self.table,
set_=self.name)],
allowed_return_codes=(0, 1) # In case table do not exist
)
if not stdout:
return None
else:
netfilter_set = self._parse_netfilter_map_string(stdout)
if netfilter_set['name'] != self.name \
or netfilter_set['address_family'] != self.address_family \
or netfilter_set['table'] != self.table \
or not self.has_type(netfilter_set['type']):
raise ValueError('Did not get the right map, too wrong to fix.')
if parse_elements:
if netfilter_set['raw_content']:
netfilter_set['content'] = self.validate_map_data({
(element.strip() for element in n_uplet.split(' : ')[0].split(' . ')) :
(element.strip() for element in n_uplet.split(' : ')[1].split(' . '))
for n_uplet in netfilter_set['raw_content'].split(',')
})
else:
netfilter_set['content'] = {}
return netfilter_set
@staticmethod
def _parse_netfilter_set_string(set_string):
"""
Parse netfilter set definition and return set as dict.
Do not validate content type against detected set type.
Return a dict with 'name', 'address_family', 'table', 'type',
Return a dict with 'name', 'address_family', 'table', 'type', 'flags',
'raw_content' keys (all strings, 'raw_content' can be None).
Raise ValueError in case of unexpected syntax.
"""
# A.K.A. Really, I don't hate you, so please don't hate me...
regexp = (
"table (?P<address_family>\w+)+ (?P<table>\w+) \{\n"
"\s*set (?P<name>\w+) \{\n"
"\s*type (?P<type>(\w+( \. )?)+)\n"
"(\s*elements = \{ "
"(?P<elements>((\n\s*)?([\w:\.]+( \. )?)+,?)*) "
"\}\n)?"
"\s*\}\n"
"\s*\}"
)
values = re.match(regexp, set_string).groupdict()
return {
'address_family': values['address_family'],
'table': values['table'],
'name': values['name'],
'type': values['type'].split(' . '),
'raw_content': values['elements'],
}
@staticmethod
def _parse_netfilter_map_string(set_string):
"""
Parse netfilter map definition and return map as dict.
Do not validate content type against detected map type.
Return a dict with 'name', 'address_family', 'table', 'type', 'flags'
'raw_content' keys (all strings, 'raw_content' can be None).
Raise ValueError in case of unexpected syntax.
"""
# Fragile code since using lexer / parser would be quite heavy
lines = [line.lstrip('\t ') for line in set_string.strip().splitlines()]
errors = []
# 5 lines when empty, 6 with elements = { … }
if len(lines) not in (5, 6):
# 5 lines when empty, 6 with elements = { … } + one for flags
if len(lines) not in (5, 6, 7):
errors.append('Error, expecting 5 or 6 lines for set definition, '
'got "{}".'.format(set_string))
@ -346,25 +532,47 @@ class NetfilterSet:
line = next(line_iterator).split(' ') # line #2
# 'set <name> {'
if len(line) != 3 or line[0] != 'set' or line[2] != '{':
if len(line) != 3 or line[0] != 'map' or line[2] != '{':
errors.append('Cannot parse set definition, expecting "set <name> '
'{{", got "{}".' .format(' '.join(line)))
else:
set_definition['name'] = line[1]
line = next(line_iterator).split(' ') # line #3
# 'type <type> [. <type>]...'
if len(line) < 2 or len(line) % 2 != 0 or line[0] != 'type' \
or any(element != '.' for element in line[2::2]):
line, elements_type = next(line_iterator).split(' : ') # line #3
# 'type <type> [. <type>]... : <type> [. <type>]...'
line = line.split(' ')
if len(line) < 2:
errors.append(
'Cannot parse type definition, left side of \':\' is too short : %s' % line
)
type_, keys_type = line[0], line[1:]
elements_type = elements_type.split(' ')
if type_ != 'type':
errors.append(
'Cannot parse type definition, expected first word \'type\', got %s' % type_
)
elif len(elements_type) % 2 != 1 or len(keys_type) % 2 != 1 \
or any(e != '.' for e in elements_type[1::2]) \
or any(e != '.' for e in keys_type[1::2]):
errors.append(
'Cannot parse type definition, expecting "type <type> '
'[. <type>]...", got "{}".'.format(' '.join(line)))
'[. <type>]... : <type> [. <type>]...", got "{}".'.format(' '.join(line)))
else:
set_definition['type'] = line[1::2]
set_definition['type'] = (keys_type[::2], elements_type[::2])
if len(lines) == 6:
# here we can have the flags, if there are any
# flags <flag_1>, <flag_2>, ...
if len(lines) >= 6:
line = next(line_iterator)
if line[:5] == 'flags': # If there are actually flags
set_definition['flags'] = {f.strip() for f in line[:5].strip().split(',')}
if len(lines) >= 6:
# set is not empty, getting raw elements
if 'flags' in set_definition and len(lines) == 7: # the line unsplitted previously has been used.
line = next(line_iterator) # Unsplit line #4
print(line)
if ('flags' in set_definition and len(lines)==7) or ('flags' not in set_definition and len(lines)==6) :
if line[:13] != 'elements = { ' or line[-1] != '}':
errors.append('Cannot parse set elements, expecting "elements '
'= {{ <…>}}", got "{}".'.format(line))
@ -372,6 +580,8 @@ class NetfilterSet:
set_definition['raw_content'] = line[13:-1].strip()
else:
set_definition['raw_content'] = None
else:
set_definition['raw_content'] = None
# last two lines
for i in range(2):
@ -393,22 +603,41 @@ class NetfilterSet:
else:
return netfilter_set['content']
def get_netfilter_map_content(self):
"""Return current set content from netfilter."""
netfilter_set = self._get_raw_netfilter_map(parse_elements=True)
if netfilter_set is None:
return None
else:
return netfilter_set['content']
def has_type(self, type_):
"""Check if some type match the set's one."""
if self.nft_type == 'set':
return tuple(self.TYPES[t] for t in self.type) == tuple(type_)
else:
return tuple(self.TYPES[t] for t in self.type) == tuple(type_[1]) and \
tuple(self.TYPES[t] for t in self.type_from) == tuple(type_[0])
def manage(self):
"""Create set if needed and populate it with target content."""
self.create_in_kernel()
self._apply_target_content()
def format_type(self):
if self.nft_type == 'set':
return ' . '.join(self.TYPES[i] for i in self.type)
else:
return ' . '.join(self.TYPES[i] for i in self.type_from) + ' : ' + ' . '.join(self.TYPES[i] for i in self.type)
class Firewall:
"""Manages the firewall using nftables."""
@staticmethod
def manage_sets(sets, address_family=None, table=None, use_sudo=None):
CONFIG = Config()
CONFIG = ConfigParser()
CONFIG.read('config.ini')
address_family = address_family or CONFIG['address_family'] or 'inet'
table = table or CONFIG['table'] or 'filter'
sudo = use_sudo or (use_sudo is None and CONFIG['use_sudo'])

7
global_policy.nft
View file

@ -1,9 +1,8 @@
table firewall {
table inet firewall {
chain global {
# Interdiction de l'encapsulation ipv6 dans ipv4
ip protocol 6 drop;
# On accepte les connexions déjà établies
ct state established,related accept
# Gestion de l'ICMP :
# On empêche le ping flood
icmp type echo-request limit rate over 50/second drop;

78
mac_ip.py Normal file
View file

@ -0,0 +1,78 @@
#! /usr/bin/python3
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# 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/>.
# Copyright © 2019 Hugo Levy-Falk <me@klafyvel.me>
"""
Creates the nat set.
"""
import logging
from configparser import ConfigParser
from re2oapi import Re2oAPIClient
from firewall import NetfilterSet
CONFIG = ConfigParser()
CONFIG.read('config.ini')
api_hostname = CONFIG.get('Re2o', 'hostname')
api_password = CONFIG.get('Re2o', 'password')
api_username = CONFIG.get('Re2o', 'username')
api_client = Re2oAPIClient(api_hostname, api_username, api_password)
api_client.list('dhcp/hostmacip')
def gen_ip_mac_set():
"""Generates the ip_mac set in nftables.
Returns:
A NetfilterSet object with the allowed ip - mac pairs.
"""
hosts = api_client.list('dhcp/hostmacip')
content = [
(h['ipv4'], h['mac_address'])
for h in hosts
if h['ipv4'] and h['mac_address']
]
return NetfilterSet(
target_content=content,
type_=('IPv4', 'MAC'),
name='ip_mac',
table_name='firewall',
)
def update_macip():
log = logging.getLogger(__name__)
if not log.hasHandlers():
handler = logging.StreamHandler()
formatter = logging.Formatter(
"%(asctime)s %(levelname)s %(name)s %(message)s"
)
handler.setFormatter(formatter)
log.addHandler(handler)
log.setLevel(logging.INFO)
log.info('Updating the ip - mac set...')
ip_mac = gen_ip_mac_set()
log.info('Applying modifications...')
ip_mac.manage()
log.info('Done')
if __name__=='__main__':
update_macip()

13
nat.nft
View file

@ -10,17 +10,8 @@ table ip nat {
chain postrouting {
type nat hook postrouting priority 100
meta oifname != $if_supelec return
meta iifname vmap {
$if_adherent : goto adh_nat,
$if_admin : goto adm_nat,
$if_aloes : goto aloes_nat,
$if_federez : goto federez_nat,
$if_prerezotage : goto prerezotage_nat,
}
ip saddr 10.0.0.0/8 masquerade
# ip saddr 10.0.0.0/8 snat to 193.48.225.3
meta oifname $if_supelec snat to 193.48.225.3
}

133
nat.py
View file

@ -30,6 +30,18 @@ CONFIG = ConfigParser()
CONFIG.read('config.ini')
def get_ip_iterable_from_str(ip):
try:
ret = netaddr.IPGlob(ip)
except netaddr.core.AddrFormatError:
try:
ret = netaddr.IPNetwork(ip)
except netaddr.core.AddrFormatError:
begin,end = ip.split('-')
ret = netaddr.IPRange(begin,end)
return ret
def create_nat(name, range_in, range_out, first_port, last_port):
"""Create two nftables tables for the nat:
- <name>_address : which link a (or a range of) local address to a
@ -46,55 +58,53 @@ def create_nat(name, range_in, range_out, first_port, last_port):
Returns:
(<name>_address, <name>_port) which are NetfilterSet
"""
assert last_port >= first_port, (name + ": Your first_port "
assert 0 <= first_port < last_port < 65536, (name + ": Your first_port "
"is lower than your last_port")
nb_private_by_public = range_in.size / range_out.size
nb_port_by_ip = (last_port - first_port + 1) / nb_private_by_public
nb_private_by_public = range_in.size // range_out.size
nb_port_by_ip = (last_port - first_port + 1) // nb_private_by_public
ports = []
ips = []
ports = {}
ips = {}
port = first_port
for ip, port in range_in:
ports.append((
str(netaddr.IPAddress(ip)),
"%d-%d" % (port, port+nb_port_by_ip)
))
for ip in range_in:
ports[(str(netaddr.IPAddress(ip)),)] = ("%d-%d" % (port, min(port+nb_port_by_ip, 65535)),)
port += nb_port_by_ip + 1
if port >= last_port:
port = first_port
ip = range_in.first
for ip_out in range_out:
ips.append((
'-'.join([
ips[('-'.join([
str(netaddr.IPAddress(ip)),
str(netaddr.IPAddress(ip+nb_private_by_public))
]),
str(ip_out)
))
]),)] = (str(ip_out),)
ip += nb_private_by_public + 1
return (
NetfilterSet(
target_content=ips,
type_=('IPv4', 'IPv4'),
name=name,
type_=('IPv4',),
name=name+'_nat_address',
table_name='nat',
flags=('interval',),
type_from=('IPv4',)
),
NetfilterSet(
target_content=ports,
type_=('IPv4', 'port'),
name=name,
type_=('port',),
name=name+'_nat_port',
table_name='nat',
flags=('interval',),
type_from=('IPv4',)
),
)
def create_nat_adherent():
range_in = netaddr.IPRange(CONFIG['range_in_adherent'])
range_out = netaddr.IPRange(CONFIG['range_out_adherent'])
first_port = CONFIG['first_port_adherent']
last_port = CONFIG['last_port_adherent']
range_in = get_ip_iterable_from_str(CONFIG['NAT']['range_in_adherent'])
range_out = get_ip_iterable_from_str(CONFIG['NAT']['range_out_adherent'])
first_port = int(CONFIG['NAT']['first_port_adherent'])
last_port = int(CONFIG['NAT']['last_port_adherent'])
return create_nat(
'adherent',
range_in,
@ -105,10 +115,10 @@ def create_nat_adherent():
def create_nat_federez():
range_in = netaddr.IPRange(CONFIG['range_in_federez'])
range_out = netaddr.IPRange(CONFIG['range_out_federez'])
first_port = CONFIG['first_port_federez']
last_port = CONFIG['last_port_federez']
range_in = get_ip_iterable_from_str(CONFIG['NAT']['range_in_federez'])
range_out = get_ip_iterable_from_str(CONFIG['NAT']['range_out_federez'])
first_port = CONFIG['NAT']['first_port_federez']
last_port = CONFIG['NAT']['last_port_federez']
return create_nat(
'federez',
range_in,
@ -119,10 +129,10 @@ def create_nat_federez():
def create_nat_aloes():
range_in = netaddr.IPRange(CONFIG['range_in_aloes'])
range_out = netaddr.IPRange(CONFIG['range_out_aloes'])
first_port = CONFIG['first_port_aloes']
last_port = CONFIG['last_port_aloes']
range_in = get_ip_iterable_from_str(CONFIG['NAT']['range_in_aloes'])
range_out = get_ip_iterable_from_str(CONFIG['NAT']['range_out_aloes'])
first_port = CONFIG['NAT']['first_port_aloes']
last_port = CONFIG['NAT']['last_port_aloes']
return create_nat(
'aloes',
range_in,
@ -133,10 +143,10 @@ def create_nat_aloes():
def create_nat_admin():
range_in = netaddr.IPRange(CONFIG['range_in_admin'])
range_out = netaddr.IPRange(CONFIG['range_out_admin'])
first_port = CONFIG['first_port_admin']
last_port = CONFIG['last_port_admin']
range_in = get_ip_iterable_from_str(CONFIG['NAT']['range_in_admin'])
range_out = get_ip_iterable_from_str(CONFIG['NAT']['range_out_admin'])
first_port = CONFIG['NAT']['first_port_admin']
last_port = CONFIG['NAT']['last_port_admin']
return create_nat(
'admin',
range_in,
@ -147,10 +157,10 @@ def create_nat_admin():
def create_nat_prerezotage():
range_in = netaddr.IPRange(CONFIG['range_in_prerezotage'])
range_out = netaddr.IPRange(CONFIG['range_out_prerezotage'])
first_port = CONFIG['first_port_prerezotage']
last_port = CONFIG['last_port_prerezotage']
range_in = get_ip_iterable_from_str(CONFIG['NAT']['range_in_prerezotage'])
range_out = get_ip_iterable_from_str(CONFIG['NAT']['range_out_prerezotage'])
first_port = CONFIG['NAT']['first_port_prerezotage']
last_port = CONFIG['NAT']['last_port_prerezotage']
return create_nat(
'prerezotage',
range_in,
@ -166,23 +176,28 @@ def main():
address.manage()
port.manage()
logging.info("Done.")
logging.info("Creating federez nat...")
address, port = create_nat_federez()
address.manage()
port.manage()
logging.info("Done.")
logging.info("Creating aloes nat...")
address, port = create_nat_aloes()
address.manage()
port.manage()
logging.info("Done.")
logging.info("Creating admin nat...")
address, port = create_nat_admin()
address.manage()
port.manage()
logging.info("Done.")
logging.info("Creating prerezotage nat...")
address, port = create_nat_prerezotage()
address.manage()
port.manage()
logging.info("Done.")
#logging.info("Creating federez nat...")
#address, port = create_nat_federez()
#address.manage()
#port.manage()
#logging.info("Done.")
#logging.info("Creating aloes nat...")
#address, port = create_nat_aloes()
#address.manage()
#port.manage()
#logging.info("Done.")
#logging.info("Creating admin nat...")
#address, port = create_nat_admin()
#address.manage()
#port.manage()
#logging.info("Done.")
#logging.info("Creating prerezotage nat...")
#address, port = create_nat_prerezotage()
#address.manage()
#port.manage()
#logging.info("Done.")
if __name__=='__main__':
logging.info('Updating the NAT table.')
main()

1
re2oapi Submodule

@ -0,0 +1 @@
Subproject commit b12df74fe73f351986ff51c8122089644218f8fe

5
zones/adherent.nft
View file

@ -7,8 +7,6 @@ table inet firewall {
}
chain from_adh {
# On passe d'abord par le checkmac pour éviter le spoof d'ip:
#ip saddr . ether saddr != @ip_mac drop
}
}
@ -22,10 +20,13 @@ table ip nat {
# nft add element nat adherent_nat_address {10.69.0.1-10.69.0.31 : 193.48.225.11}
map adherent_nat_address {
type ipv4_addr: ipv4_addr
flags interval
}
# exemple: 10.69.0.1 : 11135-12834
# On peut aussi ajouter dynamiquement des éléments :
# nft add element nat adherent_nat_port {10.69.0.1 : 11135-12834}
# Sauf qu'on peut pas faire de maps d'intervalles (seules les clés peuvent en être)
# du coup je vois rien d'autre à faire que de modifier à la volée les règles...
map adherent_nat_port {
type ipv4_addr: inet_service
flags interval