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https://github.com/Oxbian/SIDPS.git
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feat: protection system for the idps
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@ -2,7 +2,7 @@ from datetime import datetime
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import time
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def rule(packet, tcp_packets, db):
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def rule(packet, objets):
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"""Règle ACK Scan:
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Un ACK Scan va envoyer des requêtes TCP avec le flag ACK
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Si le firewall ne bloque pas, alors il répond avec le flag Reset
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@ -12,17 +12,19 @@ def rule(packet, tcp_packets, db):
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return
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# Vérification si nécessaire de récupérer les variables depuis la config
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if (rule.seuil == 0 and rule.time_window == 0):
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rule.time_window = db.get_key("ackscan_time", 180)
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rule.seuil = db.get_key("ackscan_count", 5)
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if (rule.seuil == 0 and rule.time_window == 0 and rule.ban_time == 0):
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rule.time_window = objets["config"].get("ackscan_time", 180)
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rule.seuil = objets["config"].get("ackscan_count", 5)
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rule.ban_time = objets["config"].get("ackscan_bantime", 300)
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# Comptage nombre de scan ack acceptés et refusés
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ackdeny_count = tcp_packets.count_packet_of_type(["A", "R"], rule.time_window, True)
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ackaccept_count = tcp_packets.count_packet_of_type(["A"], rule.time_window, True)
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ackdeny_count = objets["tcp_packets"].count_packet_of_type(["A", "R"], rule.time_window, True)
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ackaccept_count = objets["tcp_packets"].count_packet_of_type(["A"], rule.time_window, True)
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if (ackaccept_count + ackdeny_count >= rule.seuil):
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db.send_alert(datetime.now(), 5, None, "ACK scan", packet['IP'].src, packet['IP'].dst, proto="TCP", reason="Détection de nombreux patterns de Ack->Reset et Ack pas de réponse", act="Alerte")
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print(f"Alerte, seuil dépassés, risque d'Ack scan")
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objets["database"].send_alert(datetime.now(), 5, None, "ACK scan", objets["pkt_origin"][0], objets["pkt_origin"][2], proto="TCP", reason="Détection de nombreux patterns de Ack->Reset et Ack pas de réponse", act="Alerte")
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print("Alerte, seuil dépassés, risque d'Ack scan")
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objets["iptables_manager"].add_rule("iptables -I FORWARD -s " + objets["pkt_origin"][0] + " -j DROP", rule.ban_time)
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rule.cooldown = time.time()
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@ -30,3 +32,4 @@ def rule(packet, tcp_packets, db):
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rule.cooldown = 0
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rule.time_window = 0
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rule.seuil = 0
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rule.ban_time = 0
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