Recommand to Listen on UDP port 53

[zjlywjh001]

...
# listen for DNS query
    log('Listening for DNS queries...')
    udpserver = socket. socket(socket.AF_INET, socket.SOCK_DGRAM)  
    udpserver.bind(('0.0.0.0',53)) #listen to 53 port

    while True: dns_listener = sniff(filter='udp dst port 53', iface=args.interface, prn=dns_handler)

Recommand to add two line in the code to listen to udp port 53 .Because if we don't listen 53 port ,the kernel will always reply a "Destination Unreachable" packet to the client which will cause data transfering not stable.