Loïc Blot <loic.blot <at> unix-experience.fr> writes:

> 
> Strange but with
>  nmap -sT -p <port> <server> -PN it works.
> 

Hello,

it looks like there's some kind of incompatibility between PF and 
libdnet, which nmap uses (and maintains) for low level network
operations. The -sT -Pn switches make nmap perform non-privileged
operations only, and therefore mitigates the issue.

Could you please report the problem to d...@nmap.org? You might want to
test the latest (nmap 6.25) version first [1].


Regards

[1] http://nmap.org/download

--
Henri

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