def test_dns_block_two_domain_name(self):
rules = Rules(block_two_domain_name_rules)
binary_packet = BinaryPacket()
binary_packet.udp_source = 53
binary_packet.dns_question = 'fda.gov' # Should block
packet = Packet(pkt_dir=PKT_DIR_INCOMING, pkt=binary_packet.get_dns_packet(), geoDB=None)
result = rules.result_for_pkt(packet)
self.assertEqual(RULE_RESULT_DROP, result)
binary_packet.dns_question = 'www.fda.gov' # Should block
packet = Packet(pkt_dir=PKT_DIR_INCOMING, pkt=binary_packet.get_dns_packet(), geoDB=None)
def test_dns_block_full_domain_name(self):
rules = Rules(block_full_domain_name_rules)
binary_packet = BinaryPacket()
binary_packet.udp_source = 53
binary_packet.dns_question = 'images.google.com' # Shouldn't block
packet = Packet(pkt_dir=PKT_DIR_INCOMING, pkt=binary_packet.get_dns_packet(), geoDB=None)
result = rules.result_for_pkt(packet)
self.assertEqual(RULE_RESULT_PASS, result)
binary_packet.dns_question = 'www.google.com' # Should block
packet = Packet(pkt_dir=PKT_DIR_INCOMING, pkt=binary_packet.get_dns_packet(), geoDB=None)
def test_dns_incoming_block_weird_spelling(self):
rules = Rules(block_dns_weird_spelling_rules)
binary_packet = BinaryPacket()
binary_packet.dns_question = "www.google.com"
binary_packet.udp_source = 53
packet = Packet(pkt_dir=PKT_DIR_INCOMING, pkt=binary_packet.get_dns_packet(), geoDB=None)
result = rules.result_for_pkt(packet)
self.assertEqual(RULE_RESULT_DROP, result)
def test_dns_outgoing_block_google(self):
rules = Rules(block_google_rules)
binary_packet = BinaryPacket()
binary_packet.dns_question = "www.google.com"
binary_packet.udp_dest = 53
packet = Packet(pkt_dir=PKT_DIR_OUTGOING, pkt=binary_packet.get_dns_packet(), geoDB=None)
result = rules.result_for_pkt(packet)
self.assertEqual(RULE_RESULT_DROP, result)
def test_dns_block_all(self):
rules = Rules(block_all_dns_rules)
binary_packet = BinaryPacket()
binary_packet.udp_source = 53
questions = ["www.google.com", "www.facebook.com", "berkeley.edu"]
for question in questions:
binary_packet.dns_question = question
packet = Packet(pkt_dir=PKT_DIR_INCOMING, pkt=binary_packet.get_dns_packet(), geoDB=None)
result = rules.result_for_pkt(packet)
self.assertEqual(RULE_RESULT_DROP, result)
def test_dns_incoming_requires_qclass_one(self):
rules = Rules(block_google_rules)
binary_packet = BinaryPacket()
binary_packet.dns_question = "www.google.com"
binary_packet.udp_source = 53
# If the query type is 1 or 28 it should be okay
for qclass in range(1, 256):
binary_packet.dns_qclass = qclass
packet = Packet(pkt_dir=PKT_DIR_INCOMING, pkt=binary_packet.get_dns_packet(), geoDB=None)
result = rules.result_for_pkt(packet)
if qclass == 1:
self.assertEqual(RULE_RESULT_DROP, result)
else:
# The rule wont apply
self.assertEqual(RULE_RESULT_PASS, result)
def test_dns_outgoing_requires_query_type(self):
rules = Rules(block_google_rules)
binary_packet = BinaryPacket()
binary_packet.dns_question = "www.google.com"
binary_packet.udp_dest = 53
# If the query type is 1 or 28 it should be okay
for qtype in range(1, 256):
binary_packet.dns_qtype = qtype
packet = Packet(pkt_dir=PKT_DIR_OUTGOING, pkt=binary_packet.get_dns_packet(), geoDB=None)
result = rules.result_for_pkt(packet)
if qtype == 1 or qtype == 28:
self.assertEqual(RULE_RESULT_DROP, result)
else:
# The rule wont apply
self.assertEqual(RULE_RESULT_PASS, result)