Penetration Testing: Comprehensive firewall test using Nmap?

[Alexander Sandström Krantz A <alexander.a.sandstrom.krantz () ericsson com>]

Is it possible to automatically alter the source port when using Nmap to test a firewall? It would be very nice if it 
was possible to provide a port range instead of one single source port, even though I realise that such as scan would 
take a long time to execute. Anyone knows of any patches for Nmap that allows a source port range to be provided?

If not, do you have any other suggestion on what application to use to perform a more comprehensive firewall test?

Thanks,
Alexander

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