Adaptation du nat, et des réglages interfaces au fichier de settings python firewall
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chirac
parent
837873eede
commit
09e0006d32
1 changed files with 31 additions and 32 deletions
63
main.py
63
main.py
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@ -13,6 +13,8 @@ import subprocess
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import socket
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import argparse
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import firewall_config
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config = ConfigParser()
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config.read('config.ini')
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@ -40,9 +42,8 @@ class iptables:
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self.action = None
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self.export = False
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self.role = config.get('Firewall', 'role').split(',')
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self.interfaces_sortie = config.get('Firewall', 'interfaces_sortie').split(',')
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self.interfaces_routable = config.get('Firewall', 'interfaces_routable').split(',')
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self.interfaces_admin = config.get('Firewall', 'interfaces_admin').split(',')
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self.interfaces_settings = getattr(firewall_config, 'interfaces_type', None)
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self.nat_settings = getattr(firewall_config, 'nat', None)
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def commit(self, chain):
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self.add(chain, "COMMIT\n")
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@ -176,12 +177,10 @@ class iptables:
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print("Mangle : Réglage correct du MSS")
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self.mss()
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elif table == "nat":
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if self.verbose:
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print("Nat : priv fil")
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# self.nat_prive_ip('fil')
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if self.verbose:
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print("Nat : priv wifi")
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# self.nat_prive_ip('wifi')
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for nat_to_do in self.nat_settings:
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if self.verbose:
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print("Nat : priv" + nat_to_do['name'])
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self.nat_prive_ip(nat_to_do)
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def portail(self, table):
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if table == "filter":
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@ -255,7 +254,7 @@ class iptables:
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chain = "filter6"
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self.init_filter(subtable, decision="-")
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for interface in self.interfaces_sortie:
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for interface in self.interfaces_settings['sortie']:
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self.jump_traficto("filter", interface, "FORWARD", subtable, mode=ip_type)
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self.jump_traficfrom("filter", interface, "FORWARD", subtable, mode=ip_type)
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@ -312,7 +311,7 @@ class iptables:
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def accept_freerad_from_server(self, subtable='RADIUS-SERVER'):
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"""Accepte uniquement le trafique venant des serveurs radius federez"""
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self.init_filter(subtable, decision="-")
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for interface in self.interfaces_sortie:
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for interface in self.interfaces_settings['sortie']:
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self.jump_traficfrom("filter", interface, "INPUT", subtable)
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for server in self.config_firewall.radius_server:
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self.add_in_subtable("filter4", subtable, """-s %s -p %s -m multiport --dports %s -j ACCEPT""" % (server['ipaddr'], server['protocol'], ','.join(server['port'])))
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@ -322,7 +321,7 @@ class iptables:
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def reseaux_non_routables(self, subtable='ADM-NETWORK'):
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"""Bloc le trafic vers les réseaux non routables"""
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self.init_filter(subtable, decision="-")
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for interface in self.interfaces_admin:
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for interface in self.interfaces_settings['admin']:
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self.jump_traficto("filter", interface, "FORWARD", subtable)
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self.add_in_subtable("filter", subtable, """-j REJECT""")
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@ -342,7 +341,7 @@ class iptables:
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def capture_connexion_portail(self, subtable="PORTAIL-CAPTIF-REDIRECT"):
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"""Nat les connexions derrière l'ip de la machine du portail"""
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self.init_nat(subtable, decision="-")
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for interface in self.interfaces_routable:
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for interface in self.interfaces_settings['routable']:
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self.jump_traficfrom("nat", interface, "PREROUTING", subtable, mode='4')
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for ip in self.config.accueil_route.keys():
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@ -358,7 +357,7 @@ class iptables:
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def nat_connexion_portail(self, subtable="PORTAIL-CAPTIF-NAT"):
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"""Nat les connexions derrière l'ip de la machine du portail"""
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self.init_nat(subtable, decision="-")
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for interface in self.interfaces_sortie:
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for interface in self.interfaces_settings['sortie']:
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self.jump_traficto("nat", interface, "POSTROUTING", subtable, mode='4')
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for ip in self.config.accueil_route.keys():
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@ -395,7 +394,7 @@ class iptables:
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def limit_ssh_connexion_input(self, subtable='LIMIT-SSH-INPUT'):
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self.init_filter(subtable, decision="-")
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for interface in self.interfaces_routable:
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for interface in self.interfaces_settings['routable']:
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self.jump_traficfrom("filter", interface, "INPUT", subtable)
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self.add_in_subtable("filter", subtable, """-p tcp --dport ssh -m state --state NEW -m recent --name SSH-INPUT --set""")
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@ -403,7 +402,7 @@ class iptables:
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def limit_ssh_connexion_forward(self, subtable='LIMIT-SSH-FORWARD'):
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self.init_filter(subtable, decision="-")
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for interface in self.interfaces_sortie:
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for interface in self.interfaces_settings['sortie']:
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self.jump_traficfrom("filter", interface, "FORWARD", subtable)
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self.add_in_subtable("filter", subtable, """-p tcp --dport ssh -m state --state NEW -m recent --name SSH-FORWARD --set""")
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@ -411,7 +410,7 @@ class iptables:
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def limit_connexion_srcip(self, subtable='LIMIT-CONNEXION-SRCIP'):
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self.init_filter(subtable, decision="-")
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for interface in self.interfaces_sortie:
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for interface in self.interfaces_settings['sortie']:
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self.jump_traficto("filter", interface, "FORWARD", subtable)
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self.add_in_subtable("filter", subtable, """-p udp -m hashlimit --hashlimit-upto 400/sec --hashlimit-burst 800 --hashlimit-mode srcip --hashlimit-name LIMIT_UDP_SRCIP_CONNEXION -j RETURN""")
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@ -426,9 +425,9 @@ class iptables:
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def limit_connexion_dstip(self, subtable='LIMIT-CONNEXION-DSTIP', cible='INPUT'):
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self.init_filter(subtable, decision="-")
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for interface in self.interfaces_sortie:
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for interface in self.interfaces_settings['sortie']:
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self.jump_traficfrom("filter", interface, "FORWARD", subtable)
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for interface in self.interfaces_routable:
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for interface in self.interfaces_settings['routable']:
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self.jump_traficfrom("filter", interface, "INPUT", subtable)
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self.add_in_subtable("filter", subtable, """-p udp -m hashlimit --hashlimit-upto 400/sec --hashlimit-burst 800 --hashlimit-mode srcip --hashlimit-name LIMIT_UDP_DSTIP_CONNEXION -j RETURN""")
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@ -443,13 +442,13 @@ class iptables:
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def blacklist_hard_forward(self, subtable='BLACKLIST-HARD'):
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"""Blacklist les machines en forward, à appliquer sur les routeurs de sortie"""
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for interface in self.interfaces_routable:
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for interface in self.interfaces_settings['routable']:
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self.jump_traficfrom("filter", interface, "FORWARD", subtable)
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def blacklist_hard(self, subtable='BLACKLIST-HARD'):
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"""Génération de la chaine blackliste hard, blackliste des mac des machines bl"""
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self.init_filter(subtable, decision="-")
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for interface in self.interfaces_routable:
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for interface in self.interfaces_settings['routable']:
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self.jump_traficfrom("filter", interface, "INPUT", subtable)
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for machine in self.conn.allMachines():
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@ -460,7 +459,7 @@ class iptables:
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"""Génération de la chaine blackliste output, meme idée que si dessus sauf que
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ici on filtre les users uid sur un serveur et non leurs ip"""
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self.init_filter(subtable, decision="-")
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for interface in self.interfaces_routable:
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for interface in self.interfaces_settings['routable']:
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self.jump_traficto("filter", interface, "OUTPUT", subtable)
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for user in self.conn.search(u'(&(uidNumber=*)(!(droits=nounou))(!(droits=apprenti))(|(objectClass=adherent)(objectClass=club)))', sizelimit=10000):
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@ -470,7 +469,7 @@ class iptables:
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def forbid_adm(self, subtable='ADMIN-VLAN'):
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"""Interdit aux users non admin de parler sur les vlans admin"""
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self.init_filter(subtable, decision="-")
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for interface in self.interfaces_admin:
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for interface in self.interfaces_settings['admin']:
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self.jump_traficto("filter", interface, "OUTPUT", subtable)
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for user in self.conn.search(u'(&(uidNumber=*)(!(droits=nounou))(!(droits=apprenti))(|(objectClass=adherent)(objectClass=club)))', sizelimit=10000):
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@ -503,11 +502,11 @@ class iptables:
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def nat_prive_ip(self, nat_type):
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"""Nat filaire en v4"""
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subtable = "CONNEXION-NAT-" + nat_type.upper()
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subtable = "CONNEXION-NAT-" + nat_type['name'].upper()
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self.init_nat(subtable, decision="-")
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self.jump_all_trafic("nat", "POSTROUTING", subtable)
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nat_prive_ip_plage = self.config_firewall.nat_prive_ip_plage[nat_type]
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nat_prive_ip_plage = nat_type['ip_sources']
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for nat_ip_range in range(1, 26):
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range_name = 'nat' + nat_prive_ip_plage.split('.')[1] + '_' + str("%02d" % nat_ip_range )
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self.init_nat(range_name, decision="-")
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@ -524,18 +523,18 @@ class iptables:
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port_low = 10000 + 2000*(nat_private_ip%26)
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port_high = port_low + 1999
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subrange_name = range_name + '_' + str(hex(nat_private_ip/16)[2:])
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subrange_name = range_name + '_' + str(hex(nat_private_ip//16)[2:])
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# On nat
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for interface in self.config_firewall.nat_pub_ip_plage[nat_type]:
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ip_nat = '.'.join(self.config_firewall.nat_pub_ip_plage[nat_type][interface].split('.')[:3]) + '.' + str(10*(nat_ip_range - 1) + nat_private_ip/26)
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self.add_in_subtable("nat", subrange_name, '-s %s -o %s -p tcp -j SNAT --to-source %s' % (ip_src, self.dev[interface], ip_nat + ':' + str(port_low) + '-' + str(port_high)))
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self.add_in_subtable("nat", subrange_name, '-s %s -o %s -p udp -j SNAT --to-source %s' % (ip_src, self.dev[interface], ip_nat + ':' + str(port_low) + '-' + str(port_high)))
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for interface, pub_ip_range in nat_type['interfaces_ip_to_nat'].items():
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ip_nat = '.'.join(pub_ip_range.split('.')[:3]) + '.' + str(10*(nat_ip_range - 1) + nat_private_ip/26)
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self.add_in_subtable("nat", subrange_name, '-s %s -o %s -p tcp -j SNAT --to-source %s' % (ip_src, interface, ip_nat + ':' + str(port_low) + '-' + str(port_high)))
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self.add_in_subtable("nat", subrange_name, '-s %s -o %s -p udp -j SNAT --to-source %s' % (ip_src, interface, ip_nat + ':' + str(port_low) + '-' + str(port_high)))
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# On nat tout ce qui match dans les règles et qui n'est pas du tcp/udp derrière la première ip publique unused (25*10) + 1
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# Ne pas oublier de loguer ce qui sort de cette ip
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for interface in self.config_firewall.nat_pub_ip_plage[nat_type]:
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self.add_in_subtable("nat", subtable, '-s ' + nat_prive_ip_plage + ' -o %s -j SNAT --to-source ' % (self.dev[interface],) + '.'.join(self.config_firewall.nat_pub_ip_plage[nat_type][interface].split('.')[:3]) + '.250')
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for interface, pub_ip_range in nat_type['interfaces_ip_to_nat'].items():
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self.add_in_subtable("nat", subtable, '-s ' + nat_prive_ip_plage + ' -o %s -j SNAT --to-source ' % (interface,) + '.'.join(pub_ip_range.split('.')[:3]) + '.250')
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def gen_mangle(self, empty=False):
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"""Génération de la chaine mangle"""
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