Parefeu re2o; adaptation filtrage port + reglages des interfaces dans config.ini
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chirac
parent
9a27e5da95
commit
439da0dcbb
1 changed files with 45 additions and 42 deletions
77
main.py
77
main.py
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@ -24,7 +24,6 @@ api_client = Re2oAPIClient(api_hostname, api_username, api_password)
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client_hostname = socket.gethostname().split('.', 1)[0]
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all_switchs = api_client.list("switchs/ports-config/")
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class iptables:
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@ -40,6 +39,10 @@ class iptables:
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self.verbose = False
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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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def commit(self, chain):
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self.add(chain, "COMMIT\n")
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@ -155,7 +158,7 @@ class iptables:
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self.base_filter()
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if self.verbose:
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print("Filter : interdit les machines blacklistées en forward")
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self.blacklist_hard_forward()
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# self.blacklist_hard_forward()
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if self.verbose:
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print("Filter : filtrage ports 4")
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self.filtrage_ports(ip_type='4')
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@ -175,10 +178,10 @@ class iptables:
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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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# 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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# self.nat_prive_ip('wifi')
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def portail(self, table):
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if table == "filter":
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@ -217,7 +220,7 @@ class iptables:
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self.reseaux_non_routables()
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if self.verbose:
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print("Filter : bl hard")
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self.blacklist_hard()
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#self.blacklist_hard()
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if self.verbose:
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print("Filter : connexion input")
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if self.verbose:
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@ -252,50 +255,51 @@ 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_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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def add_general_rule(ports, ip_type, chain, subtable, rule, protocol, direction):
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def add_general_rule(ports, ip_type, chain, subtable, subnet, protocol, direction):
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"""Règles générales, fonction de factorisation"""
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if ip_type == '4':
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self.add_in_subtable(chain, subtable, """-m iprange --%s-range %s-%s -p %s -m multiport --dports %s -j RETURN""" % (direction, rule["domaine_ip_start"], rule["domaine_ip_stop"], protocol, ports))
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self.add_in_subtable(chain, subtable, """-m iprange --%s-range %s-%s -p %s -m multiport --dports %s -j RETURN""" % (direction, subnet["domaine_ip_start"], subnet["domaine_ip_stop"], protocol, ports))
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if ip_type == '6':
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self.add_in_subtable(chain, subtable, """-%s %s -p %s -m multiport --dports %s -j RETURN""" % (direction[0], rule["complete_prefixv6"], protocol, ports))
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self.add_in_subtable(chain, subtable, """-%s %s -p %s -m multiport --dports %s -j RETURN""" % (direction[0], subnet["complete_prefixv6"], protocol, ports))
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#Ajout des règles générales
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for subnet in self.subnet_ports:
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if subnet["ouverture_ports"]:
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if subnet["ouverture_ports"]["tcp_ports_in"]:
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ports = ','.join(rule["show_port"] for rule in subnet["ouverture_ports"]["tcp_ports_in"])
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if ports:
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add_general_rule(ports, ip_type, chain, subtable, rule, 'tcp', 'dst')
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add_general_rule(ports, ip_type, chain, subtable, subnet, 'tcp', 'dst')
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if subnet["ouverture_ports"]["tcp_ports_out"]:
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ports = ','.join(rule["show_port"] for rule in subnet["ouverture_ports"]["tcp_ports_out"])
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if ports:
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add_general_rule(ports, ip_type, chain, subtable, rule, 'tcp', 'src')
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add_general_rule(ports, ip_type, chain, subtable, subnet, 'tcp', 'src')
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if subnet["ouverture_ports"]["udp_ports_in"]:
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ports = ','.join(rule["show_port"] for rule in subnet["ouverture_ports"]["udp_ports_in"])
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if ports:
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add_general_rule(ports, ip_type, chain, subtable, rule, 'udp', 'dst')
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add_general_rule(ports, ip_type, chain, subtable, subnt, 'udp', 'dst')
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if subnet["ouverture_ports"]["udp_ports_out"]:
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ports = ','.join(rule["show_port"] for rule in subnet["ouverture_ports"]["udp_ports_out"])
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if ports:
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add_general_rule(ports, ip_type, chain, subtable, rule, 'udp', 'src')
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add_general_rule(ports, ip_type, chain, subtable, subnet, 'udp', 'src')
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for interface in self.interface_ports:
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ports = ','.join([ports_list['show_port'] for dict_ports in interface["port_lists"] for port_list in dict_ports["tcp_ports_in"]])
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ports = ','.join([port_list['show_port'] for dict_ports in interface["port_lists"] for port_list in dict_ports["tcp_ports_in"]])
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if ports:
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self.add_in_subtable(chain, subtable, """-d %s -p tcp -m multiport --dports %s -j RETURN""" % (interface['ipv4'], ports))
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for ipv6_addr in interface['ipv6']:
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self.add_in_subtable(chain, subtable, """-d %s -p tcp -m multiport --dports %s -j RETURN""" % (ipv6_addr['ipv6'], ports))
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ports = ','.join([ports_list['show_port'] for dict_ports in interface["port_lists"] for port_list in dict_ports["tcp_ports_out"]])
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ports = ','.join([port_list['show_port'] for dict_ports in interface["port_lists"] for port_list in dict_ports["tcp_ports_out"]])
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if ports:
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self.add_in_subtable(chain, subtable, """-s %s -p tcp -m multiport --dports %s -j RETURN""" % (interface['ipv4'], ports))
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for ipv6_addr in interface['ipv6']:
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self.add_in_subtable(chain, subtable, """-s %s -p tcp -m multiport --dports %s -j RETURN""" % (ipv6_addr['ipv6'], ports))
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ports = ','.join([ports_list['show_port'] for dict_ports in interface["port_lists"] for port_list in dict_ports["udp_ports_in"]])
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ports = ','.join([port_list['show_port'] for dict_ports in interface["port_lists"] for port_list in dict_ports["udp_ports_in"]])
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if ports:
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self.add_in_subtable(chain, subtable, """-d %s -p udp -m multiport --dports %s -j RETURN""" % (interface['ipv4'], ports))
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for ipv6_addr in interface['ipv6']:
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self.add_in_subtable(chain, subtable, """-d %s -p udp -m multiport --dports %s -j RETURN""" % (ipv6_addr['ipv6'], ports))
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ports = ','.join([ports_list['show_port'] for dict_ports in interface["port_lists"] for port_list in dict_ports["udp_ports_out"]])
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ports = ','.join([port_list['show_port'] for dict_ports in interface["port_lists"] for port_list in dict_ports["udp_ports_out"]])
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if ports:
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self.add_in_subtable(chain, subtable, """-s %s -p udp -m multiport --dports %s -j RETURN""" % (interface['ipv4'], ports))
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for ipv6_addr in interface['ipv6']:
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@ -308,7 +312,7 @@ 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_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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@ -318,7 +322,7 @@ 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['non-routables']:
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for interface in self.interfaces_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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@ -338,7 +342,7 @@ 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['routables']:
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for interface in self.interfaces_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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@ -354,7 +358,7 @@ 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_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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@ -391,7 +395,7 @@ 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['routables']:
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for interface in self.interfaces_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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@ -399,7 +403,7 @@ 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_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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@ -407,7 +411,7 @@ 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_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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@ -422,10 +426,9 @@ 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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if "sortie" in self.interfaces:
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for interface in self.interfaces['sortie']:
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for interface in self.interfaces_sortie:
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self.jump_traficfrom("filter", interface, "FORWARD", subtable)
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for interface in self.interfaces['routables']:
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for interface in self.interfaces_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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@ -440,13 +443,13 @@ 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['routables']:
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for interface in self.interfaces_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['routables']:
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for interface in self.interfaces_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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@ -457,7 +460,7 @@ 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['routables']:
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for interface in self.interfaces_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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@ -467,7 +470,7 @@ 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['non-routables']:
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for interface in self.interfaces_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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@ -555,8 +558,8 @@ class iptables:
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else:
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global_chain = self.nat4 + self.filter4 + self.mangle4
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command_to_execute = ["sudo","-n","/sbin/iptables-restore"]
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process = subprocess.Popen(command_to_execute, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
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process.communicate(input=global_chain.encode('utf-8'))
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#process = subprocess.Popen(command_to_execute, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
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#process.communicate(input=global_chain.encode('utf-8'))
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if self.export:
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print(global_chain)
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