Re: OS fingerprint extraction quality when scanning a large number of machines

[Michael Head <mrhead () us ibm com>]

David wrote on 12/18/2008 12:15:40 AM:

> I found and fixed an OS scan bug in r11421. An implementation error
> disabled global congestion control, leading to large bursts of
> outstanding probes. With the fix Nmap will not send so many at once.
>
> Unfortunately, as I said I can't reproduce the problem so I don't know
> if this fixes it specifically. If you have been compiling from source
> please try r11421. Anyone else who has experienced this problem, we
> could use your help.

I have been using the 4.76 pre-built windows installer, but I can surely
build and test it here. What's the preferred build system to make sure the
version I try is most comparable to the version I've been using?

I have cygwin and msys/mingw32 installed, but I can avail myself of MS VC++
of various versions.

> This change could potentially be disruptive for those of you who do
> large-scale OS scans. I'd appreciate some tests before and after r11421.
> My feeling is that they will take the same amount of time or will be a
> little bit slower.
>
> David Fifield

Thanks,
mike

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