Linux Networking- Nmap Script

I need a script to run the nmap command on about 50 subnets (with varying subnet lengths - input in the form of [login to view URL]\24) It will be run from a virtual server and must not cause the server to crash. It will be run as super-user. It must be multi-threaded to get through thousands of hosts per day. It should scan all 65356 ports and do it quickly - e.g. low timeouts. It must not rely on ping to establish if the host is alive - icmp is usually blocked. All major protocols - TCP, UDP, GRE should be tested. It should do each of: TCP NULL, TCP CONNECT, TCP SYN, TCP FIN It must not scan one port per host any more than 1 per second. This is to avoid smart firewalls that block on detection of stealth. Therefore: the script should accept port-ranges so that the project can be distributed amongst several EC2 instances. E.g. instance 1 does ports 1-8000, instance 2 does 8001-16000, etc. The command line should accept the port-range to make it easy to manage. Furthermore it should include the --reason for 'filtered' UDP ports. And it should detect the service version found on open ports. It should save it to a text file. It should break down a subnet into individual IP addresses. It should comment which type of scan caused the detection Next I need a script that will take the text file as input, and convert it into CSV format so that I have one row listing the IP address, the port, and its status (open, filtered, closed), the service version, and the scans it responded to (NULL,CONNECT,SYN,FIN,UDP), an any reason. The script should Gzip it and send it to an address as an attachment using sendmail. So I will have many rows for each IP address. Even by using multiple EC2 instances it becomes easy to consolidate the various CSV files. ---------------------------- If an existing tool does this project, you are welcome to use it. So long as we use a wrapper to make it one command. -------------------------- To be awarded, provide the text of the nmap parameters you propose to use. This will show me that you know what you are doing. I receive too many automated bids and need to filter these people.