Differences

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--- networking:dns:dns_response_crafter [2021/02/01 13:54] – created peter
+++ networking:dns:dns_response_crafter [2022/10/08 09:52] (current) – [Make lots of DNS requests in quick succession:] peter
@@ Line 1: / Line 1: @@
 ====== Networking - DNS - DNS Response Crafter ======
+===== Make lots of DNS requests in quick succession: =====
+<code python>
+import dns.resolver
+resolver = dns.resolver.Resolver()for x in range(2, 10):
+    for i in range(85, 200):
+        try:
+            print resolver.query(chr(i) * x + '.com', 'A')
+        except:
+            pass
+</code>
+<WRAP info>
+**NOTE:**
+See: https://dnspython.readthedocs.io/en/latest/_modules/dns/resolver.html
+</WRAP>
+----
+===== Craft Specific DNS requests =====
 <code python>
@@ Line 7: / Line 31: @@
 UDP_IP_ADDRESS  = <IP−of−virtual−machine>
 RESPONSE_IP =  '123.123.123.123'  # Can be any address.
-UDP_PORT_NO = 53  # Bind to DNS port
+UDP_PORT_NO = 53  # Bind to DNS port.
-TTL = 86400  # Time to live in cache
+TTL = 86400  # Time to live in cache.
-NAME_POINTER = "\xc0\x0c "  # Message compression rfc 1035 4.1.4910
+NAME_POINTER = "\xc0\x0c "  # Message compression rfc 1035 4.1.4910.
 def CraftResponse(addr, data):
   dns = DNS(data)
   dnsrr =  DNSRR(rrname=NAMEPOINTER, ttl=TTL, rdata=RESPONSEIP)
-  opt = DNSRROPT(rrname= '.’ ,type= 'OPT' , rclass=512,
+  opt = DNSRROPT(rrname= '.' ,type= 'OPT' , rclass=512,
         extrcode=0, version=0, z=0, rdlen=0)
-  return \ # Assemble and return packet
+  return \ # Assemble and return packet.
     IP(dst=addr[0])/\
     UDP(dport=addr[1], sport=UDPPORTNO) /\
@@ Line 26: / Line 50: @@
 def main():
-  # Set up and bind socket for UDP packets
+  # Set up and bind socket for UDP packets.
   s = socket.socket(socket.AFINET, socket.SOCKDGRAM)
   s.bind(UDPIPADDRESS, UDPPORTNO)