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RE: Fast UDP scan Aug 29 2007 04:18PM
Henderson, Dennis K. (Dennis Henderson umb com)
Read here:

http://blog.tenablesecurity.com/2007/02/udp_service_and.html

This should help you understand why if you do a generic UDP portscan you
should not exceed 1 port per second. If the server OS rate limits the
ICMP code3 type 3 messages, your scanner may think the port is open.

Dennis

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