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feat: protection system for the idps

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Oxbian
2024-11-23 12:15:10 -05:00
parent 4b84c4ebb1
commit c4df869596
16 changed files with 259 additions and 145 deletions
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17
idps/rules/TCP/DOS/synflood.py
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@ -2,7 +2,7 @@ from datetime import datetime
import time
def rule(packet, tcp_packets, db):
def rule(packet, objets):
"""
Règle SYN Flood:
Un SYN Flood va envoyer des requêtes TCP avec le flag SYN en très grand nombre afin de surcharger le serveur ou la cible
@ -15,17 +15,19 @@ def rule(packet, tcp_packets, db):
return
# Initialisation des paramètres à partir de la configuration si nécessaire
if (rule.seuil == 0 and rule.time_window == 0):
rule.time_window = db.get_key("synsflood_time", 60)
rule.seuil = db.get_key("synflood_count", 100)
if (rule.seuil == 0 and rule.time_window == 0 and rule.ban_time == 0):
rule.time_window = objets["config"].get("synsflood_time", 60)
rule.seuil = objets["config"].get("synflood_count", 100)
rule.ban_time = objets["config"].get("synflood_bantime", 300)
# Comptage des paquets TCP correspondant aux motifs spécifiques
syndeny_count = tcp_packets.count_packet_of_type(["S", "RA"], rule.time_window, True)
synaccept_count = tcp_packets.count_packet_of_type(["S", "SA", "R"], rule.time_window, True)
syndeny_count = objets["tcp_packets"].count_packet_of_type(["S", "RA"], rule.time_window, True)
synaccept_count = objets["tcp_packets"].count_packet_of_type(["S", "SA", "R"], rule.time_window, True)
# Détection si le seuil est dépassé
if (syndeny_count + synaccept_count >= rule.seuil):
db.send_alert(datetime.now(), 5, None, "Syn flood", packet['IP'].src, packet['IP'].dst, proto="TCP", reason="Détection de nombreux patterns de Syn->SynACK->Reset et Syn->Reset ACK", act="Alerte")
objets["database"].send_alert(datetime.now(), 5, None, "Syn flood", objets["pkt_origin"][0], objets["pkt_origin"][2], proto="TCP", reason="Détection de nombreux patterns de Syn->SynACK->Reset et Syn->Reset ACK", act="Alerte")
objets["iptables_manager"].add_rule("iptables -I FORWARD -s " + objets["pkt_origin"][0] + " -j DROP", rule.ban_time)
print("Alerte, seuil dépassé, risque de Syn Flood détecté.")
rule.cooldown = time.time()
@ -34,3 +36,4 @@ def rule(packet, tcp_packets, db):
rule.cooldown = 0
rule.time_window = 0
rule.seuil = 0
rule.ban_time = 0