Re: [nmap-svn] r21941 - nmap/todo

[David <david () bamsoftware com>]

On Sat, Jan 22, 2011 at 01:16:17PM +0100, Luis MartinGarcia wrote:
> On Fri, Jan 21, 2011 at 10:58 PM,  <commit-mailer () insecure org> wrote:
> > Author: david
> > Date: Fri Jan 21 13:58:55 2011
> > New Revision: 21941
> >
> > Log:
> > TODO:
> > o [Nping] See whether --echo-client mode really requires root, and
> >  remove that restriction if not.
>
> Hi David,
>
> Nping does need root access for echo mode (for both client and server
> roles). This is because the protocol requires the client to provide
> the server with details about the packets that are going to be
> transmitted. When Nping is run in unprivileged mode, most of that
> information cannot be accessed as it is the OS who crafts network
> layer and transport layer headers.
>
> If you need a more elaborate answer, please let me know.

What kind of information? What is the client unable to provide with, for
example,
        nping --echo-client "public" --tcp-connect server
What phase of the connection does it send this information in?

David Fifield
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